Patent Description:
The present invention relates to an apparatus and method for manufacturing a secondary battery.

Rechargeable batteries are classified into coin type batteries, cylindrical type batteries, prismatic type batteries, and pouch type batteries according to a shape of a battery case. The secondary battery accommodates an electrode assembly and an electrolyte. In such a secondary battery, an electrode assembly mounted in a battery case is a chargeable and dischargeable power generating device having a structure in which an electrode and a separator are stacked.

The electrode assembly may be approximately classified into a jelly-roll type electrode assembly in which a separator is interposed between a positive electrode and a negative electrode, each of which is provided as the form of a sheet coated with an active material, and then, the positive electrode, the separator, and the negative electrode are wound, a stacked type electrode assembly in which a plurality of positive and negative electrodes with a separator therebetween are sequentially stacked, and a stack/folding type electrode assembly in which stacked type unit cells are wound together with a separation film having a long length.

Recently, the pouch-type battery in which a stack/folding type electrode assembly is built in a pouch-type battery case provided as an aluminum lamination sheet is attracting much attention due to its low manufacturing cost, small weight, easy shape deformation, and the like, and thus, its usage is gradually increasing.

However, in a degassing process for the secondary battery, which discharges an internal gas of the secondary battery to the outside when manufacturing the secondary battery, there has been a problem in that an electrolyte accommodated therein is discharged together to contaminate the secondary battery, thereby deteriorating battery performance.

[Prior Art Document] (Patent Document <CIT>.

European Patent Publication <CIT> discloses an apparatus to manufacture and de-gas secondary batteries.

One aspect of the present invention is to provide an apparatus and method for manufacturing a secondary battery, which are capable of minimizing a phenomenon, in which an electrolyte accommodated in a battery case is discharged to the outside of the battery case when manufacturing the secondary battery.

An apparatus for manufacturing a secondary battery according to an embodiment of the present invention comprises: a fixing part configured to press and fix a cell comprising an electrode assembly, an electrolyte, and a battery case configured to accommodate the electrode assembly and the electrolyte, wherein the cell is fixed so that a gas pocket part is disposed above a main body of the battery case, a piercing part configured to pierce the fixed cell through a knife so as to form a gas discharge hole, a vacuum part through which the cell is maintained in a vacuum state, and an internal gas of the cell is discharged to the outside, a leakage prevention part configured to prevent the electrolyte from leaking by pressing the gas pocket part of the cell, in which the internal gas is discharged through the vacuum part, through a leakage prevention block, and a pre-sealing part configured to seal the gas pocket part.

A method for manufacturing a secondary battery according to an embodiment of the present invention comprises a fixing step of pressing and fixing a cell comprising an electrode assembly, an electrolyte, and a battery case accommodating the electrode assembly and the electrolyte, wherein the cell is fixed so that a gas pocket part is disposed above a main body of the battery case, a piercing step of piercing the gas pocket part through a knife after fixing the cell to form a gas discharge hole, a vacuum step of maintaining the pierced cell in a vacuum state and discharging an internal gas of the cell to the outside, a leakage prevention step of pressing the gas pocket part to prevent the electrolyte from leaking after the internal gas is discharged through the vacuum step, and a pre-sealing step of sealing the gas pocket part after the leakage prevention step.

According to the present invention, the internal gas of the cell may be discharged to the outside after the gas pocket part is disposed above the main body of the battery case to minimize the discharge of the electrolyte to the outside of the battery case, thereby preventing the battery performance from being deteriorated. At this time, the internal gas of the cell may be discharged to the outside after the cell is disposed vertically to minimize the discharge of the electrolyte.

In addition, according to the present invention, after the internal gas of the cell is discharged to the outside, the leakage prevention block may press the gas pocket part to pre-seal the gas pocket part, thereby preventing the electrolyte from being leaking through the gas pock part during the sealing.

The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that the reference numerals are added to the components of the drawings in the present specification with the same numerals as possible, even if they are illustrated in other drawings. Also, the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. In the following description of the present invention, the detailed descriptions of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

<FIG> is an exploded perspective view illustrating a cell applied to an apparatus for manufacturing a secondary battery according to an embodiment of the present invention, <FIG> is a perspective view illustrating the apparatus for manufacturing the secondary battery according to an embodiment of the present invention, and <FIG> is a front view illustrating a main part in the apparatus for manufacturing the secondary battery according to an embodiment of the present invention.

Referring to <FIG>, an apparatus <NUM> for manufacturing a secondary battery according to an embodiment of the present invention comprises a fixing part <NUM> pressing and fixing a cell <NUM>, a piercing part <NUM> forming a gas discharge hole in the cell <NUM>, a vacuum part <NUM> maintaining the cell <NUM> in a vacuum state, leakage prevention part <NUM> pressing a gas pocket part <NUM> of the cell <NUM> through leakage prevention blocks <NUM> and <NUM>, and a pre-sealing part <NUM> sealing the gas pocket part <NUM>.

Also, the apparatus <NUM> for manufacturing the secondary battery according to an embodiment of the present invention further comprises a moving part <NUM> and a mounting part <NUM>.

Referring to <FIG>, the cell <NUM> comprises a battery case <NUM>, an electrode assembly <NUM> accommodated in an accommodation part <NUM> of the battery case <NUM>, and an electrolyte. Also, the electrode assembly <NUM> may comprise an electrode lead <NUM> electrically connected to electrodes <NUM>.

The electrode assembly <NUM> may be a chargeable and dischargeable power generation element and be formed by alternately stacking the electrodes <NUM> and a separator <NUM>.

The electrodes <NUM> may comprise a positive electrode <NUM> and a negative electrode <NUM>. Here, the electrode assembly <NUM> may have a structure in which the positive electrode <NUM>/the separator <NUM>/the negative electrode <NUM> are alternately laminated. Also, the electrode lead <NUM> may comprise a positive electrode lead connected to the positive electrode <NUM> and a negative electrode lead connected to the negative electrode <NUM>. Here, the electrode lead <NUM> is shown to be formed in one direction of the electrode assembly <NUM> in <FIG>, but may also be formed in both directions of the electrode assembly <NUM>.

The positive electrode <NUM> may comprise a positive electrode collector and a positive electrode active material stacked on the positive electrode collector.

The positive electrode collector may be made of an aluminum foil.

The positive electrode active material may comprise lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, or a compound or mixture containing at least one of the above-described materials.

The negative electrode <NUM> may comprise a negative electrode collector and a negative electrode active material stacked on the negative electrode collector.

The negative electrode collector may be made of, for example, a foil made of a copper (Cu) material.

The negative active material may be a compound or a mixture containing a graphite-based material.

The separator <NUM> is made of an insulation material to electrically insulate the positive electrode <NUM> from the negative electrode <NUM>. Here, the separator <NUM> may be made of a polyolefin-based resin film such as polyethylene or polypropylene having micropores.

<FIG> is a front view illustrating a state in which the cell is fixed through a fixing part in the apparatus for manufacturing the secondary battery according to an embodiment of the present invention.

Referring to <FIG> and <FIG>, a fixing part <NUM> presses and fixes the cell <NUM> comprising the electrode assembly <NUM>, the electrolyte, and the battery case <NUM> accommodating the electrode assembly <NUM> and the electrolyte. Here, the battery case <NUM> of the cell <NUM> may comprise a main body <NUM> in which the accommodation part <NUM> is formed and a gas pocket part <NUM> forming a passage extending from the accommodation part <NUM> to collect an internal gas. At this time, the fixing part <NUM> may fix the cell <NUM> so that the gas pocket part <NUM> is disposed above the main body <NUM> of the battery case <NUM>. Thus, when the internal gas of the cell <NUM> is discharged to the outside, the electrolyte may be prevented from leaking through an end of the gas pocket part <NUM>.

Also, the fixing part <NUM> may press and fix the main body <NUM> of the battery case <NUM> after the end of the gas pocket part <NUM> is disposed to face an upper side. At this time, the fixing part <NUM> may press and fix the cell <NUM> in a state in which the cell <NUM> is disposed vertically. Thus, the electrolyte may be more effectively prevented from leaking through the end of the gas pocket part <NUM> when the internal gas of the cell <NUM> is discharged to the outside. At this time, if the cell <NUM> is disposed horizontally in a vacuum chamber <NUM>, one cell <NUM> may be processed, but if the cell <NUM> is disposed vertically, two or more cells <NUM> may be pressed in the vacuum chamber <NUM>. Thus, a manufacturing quantity may increase, and manufacturing costs may decrease.

Furthermore, the fixing part <NUM> may comprise a pressing jig <NUM> pressing both surfaces of the cell <NUM>. Here, the pressing jig <NUM> may be provided in a pair to press both the surfaces of the cell <NUM>, i.e., press the main body <NUM> of the battery case <NUM>. At this time, the pair of pressing jigs <NUM> may be mutually adjusted in distance therebetween by an actuator (not shown) to adjust pressing force applied to the cell <NUM>.

Also, the fixing part <NUM> may further comprise a fixing part moving means <NUM> moving the pressing jig <NUM>. Here, the fixing part moving means <NUM> may move the pressing jig <NUM> to an inner space 131a of the vacuum chamber <NUM>. At this time, the pressing jig <NUM> supports the cell <NUM> when performing a piercing step and a vacuum step on the cell <NUM> disposed in the vacuum chamber <NUM>, thereby realizing excellent processability.

The fixed part moving means <NUM> may comprise a moving motor 112a, a screw shaft (not shown) rotating by rotation of the moving motor 112a, and a fixing part frame 112b which is moved along the screw shaft according to rotation of the screw shaft and on which the pressing jig <NUM> is mounted. Here, since a technology of linearly moving a device in a direction of the screw shaft according to the rotation of the screw shaft is a technique known in the art, detailed descriptions will be omitted.

Also, when the fixing part moving means <NUM> may further comprise a sealing plate 112c that closes a side opening 131b of the vacuum chamber <NUM> when moving the pressing jig <NUM> to the inner space 131a through the side opening 131b of the vacuum chamber <NUM>.

<FIG> is a front view illustrating a state in which the cell is pierced through the piercing part in the apparatus for manufacturing the secondary battery according to an embodiment of the present invention.

Referring to <FIG>, the piercing part <NUM> may pierce the fixed cell <NUM> through a knife <NUM> to form a gas discharge hole.

Also, the piercing part <NUM> may form the gas discharge hole in a first portion 12a of the gas pocket part <NUM>.

Furthermore, the piercing part <NUM> may move the needle-shaped knife <NUM> to allow the knife <NUM> to pass through the first portion 12a of the gas pocket part <NUM>. At this time, the knife <NUM> may be moved through the actuator (not shown).

Referring to <FIG>, the vacuum part <NUM> may maintain the cell <NUM> in a vacuum state and discharge the gas within the cell <NUM> to the outside. Here, in the cell <NUM>, the gas discharge hole is formed in the gas pocket part <NUM> through the piercing part <NUM> so that the internal gas is discharged to the outside of the cell <NUM> through the gas discharge hole.

Also, the vacuum part <NUM> may comprise a vacuum chamber <NUM> having an inner space 131a formed therein and a vacuum pump <NUM> forming the inner space 131a of the vacuum chamber <NUM> into a vacuum state.

Furthermore, the vacuum part <NUM> may accommodate the cell <NUM> in the vacuum chamber <NUM> and then may vacuum the inside of the vacuum chamber <NUM> to maintain the cell <NUM> in the vacuum state.

Also, the leakage prevention part <NUM> and the pre-sealing part <NUM> may be disposed inside the vacuum chamber <NUM> to operate in the process of maintaining the vacuum state of the cell <NUM> in the vacuum part <NUM>. Here, the leakage prevention part <NUM> and the pre-sealing part <NUM> may be disposed inside the vacuum chamber <NUM>. Each of the leak prevention part <NUM> and the pre-sealing parts <NUM> may be provided in plurality inside the vacuum chamber <NUM> to process the plurality of cells <NUM> at the same time. (The piercing part <NUM>, the leakage prevention part <NUM>, and the pre-sealing part <NUM> are disposed inside the vacuum chamber <NUM>, but only the pre-sealing part <NUM> is illustrated in <FIG> for convenience.

<FIG> is a front view illustrating a state in which the cell is pressed through the leakage prevention part in the apparatus for manufacturing the secondary battery according to an embodiment of the present invention, and <FIG> is a front view illustrating a state in which the cell is pressed and pre-sealed through the leakage prevention part and the pre-sealing part in the apparatus for manufacturing the secondary battery according to an embodiment of the present invention.

Referring to <FIG> and <FIG>, the leakage prevention part <NUM> may press the gas pocket part <NUM> of the cell <NUM>, from which the internal gas is discharged through the vacuum part <NUM>, by using leakage prevention blocks <NUM> and <NUM>, to prevent the electrolyte from leaking when the gas pocket part <NUM> is sealed through the pre-sealing part <NUM>.

Also, the leakage prevention part <NUM> may press a second portion 12b disposed below the first portion 12a, in which the gas discharge hole is formed, in the gas pocket part <NUM>.

The leakage prevention blocks <NUM> and <NUM> may comprise a first leakage prevention block <NUM> and a second leakage prevention block <NUM>, which press both surfaces of the gas pocket part <NUM> of the cell <NUM>.

The first leakage prevention block <NUM> may be provided with a protrusion 141a protruding in a direction of the second leakage prevention block <NUM>. The second leakage prevention block <NUM> may have an insertion groove 142a into which an end of the protrusion 141a of the first leakage prevention block <NUM> is inserted.

The protrusion 141a of the first leakage prevention block <NUM> and the insertion groove 142a of the second leakage prevention block <NUM> may be formed in a horizontal direction.

Also, the protrusion 141a of the first leakage prevention block <NUM> and the insertion groove 142a of the second leakage prevention block <NUM> may be formed in shapes corresponding to each other.

Also, the protrusion 141a of the first leakage prevention block <NUM> may be formed in a rectangular or trapezoidal protrusion shape, and the insertion groove 142a of the second leakage prevention block <NUM> may be formed in a rectangular or trapezoidal groove shape. Here, the protrusion 141a may be formed in a shape in which a thickness of the protrusion gradually decreases in the direction of the insertion groove 142a, and the insertion groove 142a may be formed in a shape corresponding thereto.

Here, the second portion 12b of the gas pocket part <NUM>, which is between the protrusion 141a of the first leakage prevention block <NUM> and the insertion groove 142a of the second leakage prevention block <NUM> may be pressed when the protrusion 141a is inserted into the insertion groove 142a and be bent in a shape corresponding to the shape of each of the protrusion 141a and the insertion groove 142a. Here, the second portion 12b of the gas pocket part <NUM> may be bent in a shape.

Referring to <FIG>, the pre-sealing part may seal the gas pocket part <NUM>.

Also, the pre-sealing part <NUM> may seal a third portion 12c disposed below the second portion 12b pressed through the leakage prevention blocks <NUM> and <NUM> in the gas pocket part <NUM>.

Furthermore, the pre-sealing part <NUM> may comprise a first sealing block <NUM> and a second sealing block <NUM>, which press both the surfaces of the gas pocket part <NUM> by applying heat to seal the gas pocket part <NUM>.

An end of each of the first sealing block <NUM> and the second sealing block <NUM> may protrude in the horizontal direction to press the third portion 12c of the gas pocket part <NUM>, thereby forming a sealed portion in the horizontal direction.

The first leakage prevention block <NUM> and the second sealing block <NUM> may be mounted on the moving part <NUM>, and the second leakage prevention block <NUM> and the second sealing block <NUM> may be mounted on the mounting part <NUM>.

Here, the moving part <NUM> may move the first leakage prevention block <NUM> and the first sealing block <NUM> in a direction facing the second leakage prevention block <NUM> and the second sealing block <NUM>.

Also, the moving part <NUM> may further comprise a cylinder <NUM>, which moves the first leakage prevention block <NUM> and the first sealing block <NUM>. Here, the cylinder <NUM> may be provided as a pneumatic actuator or a hydraulic actuator.

As an example, when the second portion 12b of the gas pocket part <NUM> is pressed by the leakage prevention blocks <NUM> and <NUM> of the leakage prevention part <NUM>, the pre-sealing part <NUM> may simultaneity seal the third portion 12c of the gas pocket part <NUM>.

As another example, the pre-sealing part <NUM> may seal the third portion 12c of the gas pocket part <NUM> after the second portion 12b of the gas pocket part <NUM> is pressed by the leakage prevention blocks <NUM> and <NUM> of the leakage prevention part <NUM>. Here, a mutual distance between the first and second leak prevention blocks <NUM> and <NUM> may be closer than that between the first and second sealing blocks <NUM> and <NUM>. Thus, when the first leakage prevention block <NUM> and the first sealing block <NUM> are moved through the moving part <NUM>, the second sealing block <NUM> The block <NUM> and the second leakage prevention block <NUM> may press the gas pocket part <NUM> first rather than the first sealing block <NUM> and the second sealing block <NUM>.

Hereinafter, a method for manufacturing a secondary battery according to an embodiment of the present invention will be described.

Referring to <FIG>, a method for manufacturing a secondary battery according to an embodiment of the present invention comprises a fixing step of pressing and fixing a cell <NUM>, a piercing step of piercing the cell <NUM> through a knife <NUM> to form a gas discharge hole, a vacuum step of maintaining the pierced cell <NUM> in a vacuum state, a leakage prevention step of pressing a gas pocket part <NUM> to prevent an electrolyte from leaking, and a pre-sealing step of sealing the gas pocket part <NUM>.

A pre-degassing method for manufacturing the secondary battery according to an embodiment of the present invention is a method for manufacturing a secondary battery through the apparatus <NUM> for manufacturing the secondary battery according to an embodiment of the present invention. Thus, in descriptions of the method for manufacturing the secondary battery according to this embodiment of the present invention, contents duplicated with the apparatus <NUM> for manufacturing the secondary battery according to forgoing embodiment of the present invention will be omitted or briefly described, and also, differences therebetween will be mainly described.

In more detail, referring to <FIG> and <FIG>, in the fixing step, the cell <NUM> comprising the electrode assembly <NUM>, the electrolyte, and the battery case <NUM> accommodating the electrode assembly <NUM> and the electrolyte may be pressed and fixed.

Also, in the fixing step, the cell <NUM> may be fixed through the fixing part <NUM> so that the gas pocket part <NUM> is disposed above the main body <NUM> of the battery case <NUM>. Here, the battery case <NUM> of the cell <NUM> may comprise a main body <NUM> in which the accommodation part <NUM> is formed and a gas pocket part <NUM> forming a passage extending from the accommodation part <NUM> to collect an internal gas. Here, in the fixing step, the end of the gas pocket part <NUM> may be disposed to face an upper side and then press and fix the main body <NUM> of the battery case <NUM>. Thus, in the fixing step, the electrolyte may be prevented from leaking through an end of the gas pocket part <NUM> when the internal gas of the cell <NUM> is discharged to the outside.

Furthermore, in the fixing step, the fixing part <NUM> may press and fix the cell <NUM> in a state in which the cell <NUM> is disposed vertically. Thus, the electrolyte may be more effectively prevented from leaking through the end of the gas pocket part <NUM> when the internal gas of the cell <NUM> is discharged to the outside.

Also, in the fixing step, both surfaces of the cell <NUM> may be pressed through the pressing jig of the fixing part <NUM>.

Here, in the fixing step, the cell <NUM> fixed to the pressing jig <NUM> through the fixing part moving means <NUM> may be moved to the inner space 131a of the vacuum chamber <NUM>. Here, the pressing jig <NUM> may support the cell <NUM> to realize superior processability when the piercing step and the vacuum step are performed.

Referring to <FIG>, in the piercing step, after the cell <NUM> is fixed, the gas pocket part <NUM> may be pierced through the knife <NUM> of the piercing part <NUM> to form the gas discharge hole.

Also, in the piercing step, the gas discharge hole may be formed in the first portion 12a of the gas pocket part <NUM>.

Furthermore, in the piercing step, the needle-shaped knife <NUM> may be moved to pass through the first portion 12a of the gas pocket part <NUM>.

Referring to <FIG> and <FIG>, in the vacuum step, the pierced cell <NUM> is maintained in a vacuum state through the vacuum part <NUM>, and the internal gas of the cell <NUM> may be discharged to the outside.

Also, in the vacuum step, after accommodating the cell <NUM> in the vacuum chamber <NUM> of the vacuum part <NUM>, the inside of the vacuum chamber <NUM> may be vacuumed to maintain the cell <NUM> in the vacuum state. At this time, in the cell <NUM>, the gas discharge hole is formed in the gas pocket part <NUM> through the piercing step so that the internal gas is discharged to the outside of the cell <NUM> through the gas discharge hole.

Here, the inner space 131a of the vacuum chamber <NUM> may be formed in the vacuum state through a vacuum pump <NUM> of the vacuum part <NUM>.

Referring to <FIG> and <FIG>, in the leakage prevention step, after the internal gas is discharged through the vacuum step, the gas pocket part <NUM> may be pressed by the leakage prevention blocks <NUM> and <NUM> to prevent the electrolyte from leaking when the gas pocket part <NUM> is sealed in the pre-sealing step.

Also, in the leakage preventing step, the second portion12b disposed below the first portion 12a, in which the gas discharge hole is formed, in the gas pocket part <NUM> may be pressed.

Also, the protrusion 141a of the first leakage prevention block <NUM> may be formed in a rectangular protrusion shape, and the insertion groove 142a of the second leakage prevention block <NUM> may be formed in a rectangular groove shape.

Here, the second portion 12b of the gas pocket part <NUM>, which is between the protrusion 141a of the first leakage prevention block <NUM> and the insertion groove 142a of the second leakage prevention block <NUM> may be pressed when the protrusion 141a is inserted into the insertion groove 142a in the leakage prevention step and be bent in a shape corresponding to the shape of each of the protrusion 141a and the insertion groove 142a. Here, in the leakage preventing step, the second portion 12b of the gas pocket part <NUM> may be bent in a "<IMG>" shape.

Referring to <FIG>, in the pre-sealing step, the gas pocket part <NUM> may be sealed through the pre-sealing part <NUM> after the leakage prevention step.

Also, in the pre-sealing step, a third portion 12c disposed below the second portion 12b pressed through the leakage prevention blocks <NUM> and <NUM> in the gas pocket part <NUM> may be sealed.

Here, the pre-sealing part <NUM> may comprise a first sealing block <NUM> and a second sealing block <NUM>, which press both the surfaces of the gas pocket part <NUM> by applying heat to seal the gas pocket part <NUM>.

Also, in the pre-sealing step, an end of each of the first sealing block <NUM> and the second sealing block <NUM> may protrude in the horizontal direction to press the third portion 12c of the gas pocket part <NUM>, thereby forming a sealed portion in the horizontal direction.

The leakage prevention step and the pre-sealing step may be performed during the process of maintaining the vacuum state of the cell <NUM> in the vacuum step.

As an example, the leakage prevention step and the pre-sealing step may be performed at the same time. That is, when the second portion 12b of the gas pocket part <NUM> is pressed by the leakage prevention blocks <NUM> and <NUM> of the leakage prevention part <NUM>, the pre-sealing part <NUM> may simultaneity seal the third portion 12c of the gas pocket part <NUM>.

As another example, after the gas pocket part <NUM> is pressed by the leakage prevention blocks <NUM> and <NUM> in the leakage prevention step, the pre-sealing step may be performed. Here, in the pre-sealing step, after the second portion 12b of the gas pocket part <NUM> is pressed by the leakage prevention blocks <NUM> and <NUM>, the third portion 12c of the gas pocket part <NUM> may be sealed. Here, a mutual distance between the first and second leak prevention blocks <NUM> and <NUM> may be closer than that between the first and second sealing blocks <NUM> and <NUM>. Thus, in the leakage prevention step, when the first leakage prevention block <NUM> and the first sealing block <NUM> are moved through the moving part <NUM>, the second sealing block <NUM> The block <NUM> and the second leakage prevention block <NUM> may press the gas pocket part <NUM> in advance rather than the first sealing block <NUM> and the second sealing block <NUM>. Here, in the leakage prevention step, the first leakage prevention block <NUM> and the first sealing block <NUM> may be mounted on the moving part <NUM>, and the first leakage prevention block <NUM> and the first sealing block <NUM> may be moved by the moving part <NUM> in the direction facing the second leakage prevention block <NUM> and the second sealing block <NUM>.

In the method of manufacturing the secondary battery according to an embodiment of the present invention, after a pre-degassing process, the remaining portion of the gas pocket part <NUM> except for the sealed part of the battery case <NUM> may be removed to manufacture the secondary battery.

In addition, the secondary battery manufacturing method according to the embodiment of the present invention may further comprise a first charging step of primarily charging the cell <NUM> before the vacuum step and a second charging/discharging step of charging and discharging the cell <NUM> after the pre-sealing step.

While the present invention has been described in detail with reference to exemplary embodiments, it is to be understood that the scope of the present invention is not limited to the apparatus and method for manufacturing the secondary battery according to the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention.

Claim 1:
An apparatus (<NUM>) for manufacturing a secondary battery, the apparatus comprising:
a fixing part (<NUM>) configured to press and fix a cell (<NUM>) comprising an electrode assembly (<NUM>), an electrolyte, and a battery case (<NUM>) configured to accommodate the electrode assembly (<NUM>) and the electrolyte, wherein the cell (<NUM>) is fixed so that a gas pocket part (<NUM>) is disposed above a main body (<NUM>) of the battery case (<NUM>);
a piercing part (<NUM>) configured to pierce the fixed cell (<NUM>) through a knife (<NUM>) so as to form a gas discharge hole;
a vacuum part (<NUM>) through which the cell (<NUM>) is maintained in a vacuum state, and an internal gas of the cell (<NUM>) is discharged to the outside;
characterized by:
a leakage prevention part (<NUM>) configured to prevent the electrolyte from leaking by pressing the gas pocket part (<NUM>) of the cell (<NUM>), in which the internal gas is discharged through the vacuum part (<NUM>), through a leakage prevention block (<NUM>, <NUM>); and
a pre-sealing part (<NUM>) configured to seal the gas pocket part (<NUM>).