KR20190020146A - Secondary battery manufacturing method - Google Patents

Abstract

According to an embodiment of the present invention, there is provided a method of manufacturing a secondary battery, comprising: an electrode part notching step of cutting an edge of an electrode part into a designed shape; A step of inserting a plurality of electrode parts and a separation membrane into a laminae in a state that the electrode parts and the separation membrane are sequentially laminated and pressing them into a single body, and cutting the electrode part and separation part of the separation membrane, which are drawn out from the laminator, An electrode lamination step comprising; Cutting a part of the separation membrane of the mono-cell body along the edge of the electrode part to form a mono cell corresponding to the designed shape of the electrode part; A mono-cell stacking step of stacking a plurality of mono cells cut with a separator; A thermocompression bonding step of compressing a mono cell laminate comprising a plurality of mono cells stacked by heat and pressure; And a packaging step of wrapping and wrapping the battery cell completed by thermocompression in a pouch.

Description

Secondary battery manufacturing method

The present invention relates to a secondary battery manufacturing method.

2. Description of the Related Art Unlike a primary battery, which can not normally be charged, a secondary battery capable of charging and discharging is being actively studied in the development of advanced fields such as a digital camera, a mobile phone, and a hybrid vehicle. Examples of the secondary battery include a nickel-cadmium battery, a nickel-hydrogen battery, and a lithium secondary battery.

The secondary battery can be classified into a stacked structure, a winding type (jelly roll type) structure, and a folding type structure.

1 is a view illustrating a manufacturing process of a conventional folding type secondary battery.

1, in order to manufacture a folding type secondary battery 1, a bi-cell 3, 4 having the same electrodes on both surfaces thereof is arranged in a separator 2, 2) so that the plurality of bi-cells are stacked. The bi-cell includes a first type cell 3 stacked with a cathode-separator-cathode-separator-anode, and a second cell 4 stacked with a cathode-separator-anode-separator-cathode. In order to manufacture the folding type secondary battery 1, the first type cell 3 and the second type cell 4 are alternately disposed on the separation membrane 2, and then the separation membrane 2 is rolled to form the first The type cell 3 and the second type cell 4 are alternately laminated.

Such a folding type secondary battery has the following problems.

First, since the separator must be rolled and laminated, there is a problem that it can not be realized in the form of a rectangular parallelepiped secondary battery. In recent years, various types of electronic devices have been introduced, and accordingly, various geometries of batteries have been required. For example, cells having a rounded shape (circular, elliptical, etc.) or a stepped shape (stepped shape or L shape) are disadvantageous in that they can not be realized by a folding method.

Second, in the case of the folding type secondary battery, the battery may be sideways pushed as the stack height increases. That is, in order to form a large-capacity secondary battery, the thickness of the lamination layer should be increased, and the longitudinal section should be maintained in a rectangular shape or a square shape. However, in the folding process, the bi-cells may be pushed to the side and deformed into a parallelogram shape.

Thirdly, according to the folding type secondary battery manufacturing method, there is a disadvantage that the electrode taps arranged up and down can not be aligned accurately and the degree of deviation in the left and right direction becomes large.

<Prior Art>

KR2015-0025420A (March 10, 2015)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems.

According to another aspect of the present invention, there is provided a method of manufacturing a secondary battery, comprising: an electrode part notching step of cutting the edge of the electrode part into a designed shape; A step of inserting a plurality of electrode parts and a separation membrane into a laminae in a state that the electrode parts and the separation membrane are sequentially stacked and pressing them into a single body, and cutting the electrode part and separation part of the separation membrane, which are drawn out from the laminator, An electrode lamination step comprising; Cutting a part of the separation membrane of the mono-cell body along the edge of the electrode part to form a mono cell corresponding to the designed shape of the electrode part; A mono-cell stacking step of stacking a plurality of mono cells cut with a separator; A thermocompression bonding step of compressing a mono cell laminate comprising a plurality of mono cells stacked by heat and pressure; And a packaging step of wrapping and wrapping the battery cell completed by thermocompression in a pouch.

The membrane cutting step may include an aligning step of aligning the monocell matrix to the baseline so as to cut the separator precisely along the cut line.

The cutting line of the separation membrane cut in the membrane cutting step may include a curved line or a bent line.

The mono cell stacking step is characterized in that mono cells having different sizes or shapes are stacked.

The present invention is characterized in that the mono cells having different sizes or shapes are stacked to form a stepped top surface.

Wherein the thermocompression step comprises a pre-press step of compressing the mono-cell laminate with low heat and pressure, a main press step of compressing the mono cell laminate with high heat and pressure after the pre-press step, And a final press step of finally pressing the press.

The present invention may further include a tap welding step of welding a tab of the thermocompression-bonded battery cell into a single body.

The secondary battery manufacturing method according to the embodiment of the present invention has the following effects.

First, the lamination-type secondary battery manufacturing method has an advantage that a battery cell having various geometries other than a rectangular parallelepiped can be manufactured. Therefore, since the secondary battery can be designed in an appropriate shape according to the design of the electric product to which the secondary battery is attached, the degree of freedom in designing the battery cell is improved.

Second, for the production of a large-capacity battery, even if the stack height (or thickness) of the cell is increased, the phenomenon of being sideways does not occur.

Third, there is an advantage that the degree of deviation of the electrode taps adjacent to the upper and lower sides in the left and right direction is remarkably reduced.

1 is a view showing a manufacturing process of a conventional folding type secondary battery.
2 is a perspective view of a secondary battery cell according to an embodiment of the present invention.
3 is a plan view of mono cells constituting the secondary battery cell.
4 is a flow chart for explaining the entire process of manufacturing a stacked secondary battery according to an embodiment of the present invention.
5 is a view illustrating an electrode notching process included in a method of manufacturing a secondary battery according to an embodiment of the present invention.
6 is a view illustrating an electrode laminating process included in a method of manufacturing a secondary battery according to an embodiment of the present invention.
7 is a plan view of a mono cell that has undergone a membrane cutting process;
8 is a flow chart showing a separation membrane cutting process in a separation membrane cutting apparatus according to an embodiment of the present invention.
9 is an external perspective view of a membrane cutting apparatus according to an embodiment of the present invention.
10 is an enlarged perspective view of a pickup unit constituting a separation membrane cutting apparatus according to an embodiment of the present invention;
11 is an enlarged perspective view of an aligning portion and a separating membrane cutting portion which constitute a separating membrane cutting device according to an embodiment of the present invention;
12 is an enlarged perspective view of a defect inspection unit constituting a separation membrane cutting apparatus according to an embodiment of the present invention;
FIG. 13 is an enlarged perspective view of a loading unit constituting a membrane cutting apparatus according to an embodiment of the present invention; FIG.
14 is a perspective view of a cell stacking and thermocompression bonding apparatus according to an embodiment of the present invention.
15 is a flow chart showing a stacking process of a cell stacking and thermocompression bonding unit according to an embodiment of the present invention in order.
16 to 18 are views showing a configuration of a cell stacking and thermocompression bonding apparatus in which a monocell laminating process according to an embodiment of the present invention is performed.
FIG. 19 is a flowchart sequentially illustrating a thermal compression process performed in a cell stacking and thermocompression bonding apparatus according to an embodiment of the present invention. FIG.
20 is an enlarged perspective view showing a pre-press section and a main press section constituting a cell laminating apparatus and a thermocompression apparatus according to an embodiment of the present invention;
21 is an enlarged perspective view showing a device for putting a mono-cell laminate into a press device.
22 is a perspective view of a press apparatus according to an embodiment of the present invention.
23 is a bottom perspective view of a press upper constituting the press apparatus.
24 is an enlarged perspective view showing a final press area of a cell stacking and thermocompression bonding apparatus according to an embodiment of the present invention;
25 is a view showing a process of inspecting a secondary battery cell that has undergone the thermocompression process.
26 is an enlarged perspective view of a stacking portion constituting a cell stacking and thermocompression bonding portion according to an embodiment of the present invention;

Hereinafter, a method of manufacturing a secondary battery according to an embodiment of the present invention, particularly a method of manufacturing a stacked type secondary battery, and an apparatus used in a manufacturing method according to an embodiment of the present invention will be described in detail with reference to the drawings.

Hereinafter, it is noted that the adsorbing portion and the adsorption plate may be used in combination, but the constitution and the function are the same.

FIG. 2 is a perspective view of a secondary battery cell according to an embodiment of the present invention, and FIG. 3 is a plan view of mono cells constituting the secondary battery cell.

Referring to FIGS. 2 and 3, a secondary battery cell 10 manufactured by the method of manufacturing a secondary battery according to an embodiment of the present invention includes mono cells 11, 12 and 13 are stacked. The secondary battery cell 10 shown in FIG. 2 is a state before being wrapped by the pouch.

In detail, the secondary battery cell 10 has a specific shape deviating from a conventional typical rectangular parallelepiped shape. Such a shape is obtained by stacking a plurality of mono cells 11, 12, 13 having a specific shape, Can be implemented.

FIG. 4 is a flowchart illustrating an entire manufacturing process of a stacked secondary battery according to an embodiment of the present invention.

Referring to FIG. 4, a method of manufacturing a secondary battery according to an embodiment of the present invention includes steps of: electrode notching (S10), electrode lamination (S20), separator cutting (S30), monocell stacking (S40) A thermal compression step S50, a package step S60, and a degas step S70.

The battery cell thermocompression step S50 from the electrode notching step S10 to the battery cell thermocompression step S50 will be described in detail below with reference to the drawings.

Meanwhile, the battery cell in which the thermocompression process has been completed proceeds to the packaging step (S60). A tab welding step of welding a plurality of electrode tabs laminated in a vertical direction in a single body in the packaging step; a forming step of forming the pouch in a battery cell form; A cell assembling step for sealing the three edges, and an electrolyte injection step for injecting the electrolyte through the open portion without being sealed.

Since the packaging step is substantially the same as that of the conventional folding type secondary battery manufacturing method, a detailed description thereof will be omitted. In the packaging step, there is a difference in how certain types of battery cells enter the accommodating portion formed after the pouch forming, and the other manufacturing steps are different from the packaging step applied to the folding type manufacturing method and the manufacturing method according to the embodiment of the present invention The applicable packaging steps can be said to be the same.

In the degassing step (S70), the battery is activated by charging and discharging the pouch-sealed secondary battery product, and a degassing step for discharging the gas generated in the cell activating step, and a final compression after resealing Step is performed. The degassing step is the same as the degassing step applied to the folding type secondary battery manufacturing method, as in the packaging step, and a detailed description thereof will be omitted.

Hereinafter, the equipment used in the separation membrane cutting process and the separation membrane cutting process, which is a main feature of the secondary battery manufacturing method according to the embodiment of the present invention, the cell stacking and thermocompression process, I will explain it mainly.

FIG. 5 is a view illustrating an electrode notching process included in a method of manufacturing a secondary battery according to an embodiment of the present invention.

Referring to FIG. 5, a method of manufacturing a secondary battery according to an embodiment of the present invention includes electrode notching (S10).

Specifically, in the electrode notching step, a tab portion and a rounded portion of an edge of the electrode are formed while an electrode material S provided with a predetermined width and wound in a roll form is supplied to the notching device. The electrode notching step is performed before the electrode part cutting step of separating the individual electrode parts 100 when the electrode part is designed to have a shape other than a rectangular shape. The electrode portion includes an anode electrode portion and a cathode electrode portion.

The electrode unit is formed in a shape corresponding to the final shape of the secondary battery cell, that is, the top view of the secondary battery cell. In the case of the secondary battery cell shown in FIG. 2, the electrode portion is required to have an electrode shape in which one corner is rounded.

Therefore, in the notching step, the edge of the electrode portion is cut roundly, and a tab is formed at one side edge.

In the notching step, the electrode material S supplied in the form of rolls is continuously fed into the notching device, and the middle portion B of the electrode material supplied in the form of a rectangular sheet in the notching device is cut into a predetermined width A notching operation is performed in which only the tab of the electrode portion is left. At the same time, a notching operation is performed in which both end portions B are cut along the design shape of the electrode portion as shown in the figure. Through this notching operation, one electrode material (S) sheet can be divided into two rows of electrode portions. In the electrode lamination step to be described later, a portion indicated by a dotted line is cut by a cutter and divided into individual electrode portions. The two rows of electrode portions become the first and second electrode materials described below.

6 is a view illustrating an electrode laminating process included in a method of manufacturing a secondary battery according to an embodiment of the present invention.

6, a first electrode material 101, a first separator material 102, a second electrode material 103, and a second separator material 104, which are supplied in a roll form, are sequentially stacked And supplied to the laminators 11 and 12. The first electrode material 101 and the second electrode material 103 each function as an anode and a cathode or a cathode and an anode after the cell is manufactured.

In addition, the first and second electrode materials 101 and 103 supplied in a roll form are connected to each other without separating the individual electrode parts 100 through the notching step described with reference to FIG. In this state, the first and second electrode materials 101 and 103 are cut by the cutter C1 shown in FIG. 5 before being drawn into the laminators L1 and L2.

Then, the electrode parts and the separators are thermo-compressed into a single body while passing through the laminator (L1, L2). Then, at the outlet end of the laminators L1 and L2, the combined body of the electrode portion and the separator is cut off by the cutter C3. The cutter C3 cuts the first separator 102 and the second separator 104. Through the cutting process, a plurality of monocell bodies 105 are completed. Here, the monocell body 105 may be defined as a cell unit that is in a state before the separation membrane is cut along the shape of the electrode part, and may be defined as a mono cell after the separation membrane is cut.

The electrode laminating process is the same as that shown in Fig. 6 of the above prior art (KR2015-0025420A), except that the shape of the electrode material subjected to the notching step is different.

7 is a top view of a mono cell that has undergone a membrane cutting process.

7, when the monocell body 105 passes the separator coating process according to the embodiment of the present invention, the unnecessary separator portion h7 is cut to form one complete mono-cell 1112 , 13). The mono cell 11 may be divided into a first mono cell 11, a second mono cell 12 and a third mono cell 13 as shown in FIG. 3 depending on the size thereof . In other words, mono cells of various shapes and sizes can be formed according to the design of the secondary battery cell.

Hereinafter, a separator cutting apparatus and a cutting process for removing an unnecessary separation membrane portion will be described with reference to the drawings.

8 is a flow chart showing a separation membrane cutting process in the separation membrane cutting apparatus according to the embodiment of the present invention.

Referring to FIG. 8, a plurality of monocell bodies 105 manufactured by the laminator illustrated in FIG. 6 are stacked in a stack defined as a cassette. And are independently loaded in separate cassettes according to the shape and size of the monocell bodies 105. Therefore, the number of the cassettes to be fed to the separation membrane cutting device may be plural.

In detail, in order to remove unnecessary separation membrane portion h7 formed in each of the monocell body 105, a step (S31) of picking up a monocell matrix loaded on the cassette transferred to the separation membrane cutting device A step S32 of moving the monocell matrix to the reference line for cutting the membrane using the image information, a step S33 of aligning the matrix with the reference line for cutting the membrane, (Step S34). In step S35, the monocell cut with unnecessary separation membrane part is transported and cut by the vision camera. The good or defective product is classified based on the photographed monocell image information. A step S36 in which the monocell is discarded, and a step S37 in which the monocell determined as a good product is loaded on the cassette. Then, the cassette on which the good monocell is mounted is transferred to the cell stacking and thermo-compression device for manufacturing the secondary battery cell.

Hereinafter, the configuration and operation of the membrane cutting apparatus in which the above-described processes are performed will be described in detail with reference to the drawings.

9 is an external perspective view of a membrane cutting apparatus according to an embodiment of the present invention.

9, a separation membrane cutting apparatus 30 according to an embodiment of the present invention includes a pickup unit C for picking up and transporting a monocell matrix formed through a lamination step, (E) for cutting the separation membrane portion of the monocell body transferred from the alignment portion (D), and a separator cutting portion (E) for separating the monocell body A defect inspection portion F for inspecting whether or not a cell is defective, and a loading portion G for loading a mono cell determined as a good product.

Hereinafter, each part described above will be described in detail with reference to the drawings.

10 is an enlarged perspective view of a pickup unit constituting a separation membrane cutting apparatus according to an embodiment of the present invention.

10, the pick-up unit C of the separation membrane cutting apparatus 30 according to the embodiment of the present invention includes a plurality of cassettes 301 on which monocell cells having been laminated are stacked, A pickup unit 31 for picking up the monocell body mounted on the pick-up unit 31 on a sheet-by-sheet basis, and a transfer unit 32 for picking up the monocell body picked up by the pick-up unit 31 and transferring the picked- .

In detail, the cassette 301 can be determined according to the number of kinds of mono cells to be manufactured. That is, as shown in FIG. 3, if three sizes of mono cells are required to make one secondary battery cell, three cassettes 301 may be prepared. Therefore, the number of the cassettes 301 can be determined depending on the types of mono cells having different shapes and sizes.

Alternatively, if one of the mono cells of the different types of mono cells is stacked relatively higher in the secondary battery manufacturing process than the other types of mono cells, the number of the cassettes for loading the same type of mono cell is A plurality can be prepared. It is apparent that a relatively large number of mono cells will be used when fabricating one battery cell because the stack height is relatively higher than mono cells having different shapes or sizes. Therefore, in such a case, it is advantageous that a large number of cassettes for loading monocells of the same kind are prepared.

The pick-up unit 31 includes a pick-up body 311 for picking up a single monocell body placed on the cassette 301 and a pick-up body 311 for picking up a single monocell body, A drive motor 314 for rotating the pick-up body 311 in the forward and reverse directions by 180 degrees and a drive motor 314 for rotating the pick-up body 311 along the rotation axis of the drive motor 314 and the side center of the pickup body 311 And may include a rotating shaft 313 for connecting.

In detail, the pickup body 311 and the suction unit 312 may be defined as a pickup module. The pick-up module is provided in a number corresponding to the number of the cassettes 301, and is located in the upper right room of each of the plurality of cassettes 301.

Further, the driving motor 314 may be mounted on the elevating portion 302, which is slidably mounted on the vertically erected guide pillar 303. The driving motor 314 is moved up and down along the guide pillar 303 together with the elevating portion 302 during the pickup process.

In addition, the plurality of pick-up modules rotate in one body by the rotation shaft 313. That is, the rotation shaft 313 passes through the plurality of pickup modules, specifically, the plurality of pickup bodies 311, so that the plurality of pickup modules rotate in one body.

One or more suction units 312 are formed on the top and bottom surfaces of the pick-up body 311 to pick up the monocell bodies loaded on the cassette 301 one by one. When one suction unit 312 is provided, the suction unit 312 may be disposed on the upper surface and the lower surface of the pickup body 311. When two suction units 312 are provided, the suction unit 312 may be arranged in a row in the left-right direction or the front-rear direction at the center of the bottom surface and the bottom surface of the pickup body 311. When three or more adsorption units 312 are provided, the top and bottom surfaces of the pick-up body 311 may be arranged in a polygonal shape corresponding to the number of the adsorption units provided, such as a triangle or a quadrangle .

In addition, vibrating means for vibrating the adsorption unit 312 in the up-and-down direction may be provided in the adsorption unit 312 or inside the pickup body 311. For example, the suction unit 312 may be a cylindrical bellows in which a spring is wound in a spiral form, and a vibration means for stretching and contracting the spring at a high speed may be provided inside the pickup body 311 .

The transfer unit 32 may include a transfer body 321 and a suction plate 322 provided on the transfer body 321. The conveying body 321 can move horizontally and vertically up and down by guide rails or guide posts.

According to this structure, when the elevation part 302 on which the driving motor 314 is mounted is lowered and the suction part 312 positioned on the bottom surface of the pickup body 311 is loaded on the cassette 301 Allowing the top monocell body of the monocell bodies to be adsorbed. Then, the vibrating means operates for a short time in a state in which the adsorbing portion 312 adsorbs the mono-cell body, so that the mono-cell body is shaken at a high speed. Then, the two or more monocell matrix bodies which were sticking to each other while being stacked can be separated, thereby preventing the plurality of monocell matrix bodies from being adsorbed and transferred at one time.

The driving motor 314 is operated in a state where two or more monocell bodies are separated by the operation of the vibrating means and only one monocell body is attracted to the adsorbing portion 312, Is rotated by 180 degrees in either the clockwise direction or the counterclockwise direction. Then, the adsorbed monocell body is positioned on the upper surface of the pick-up body 311, and the adsorbing part 312 positioned on the upper surface is directed toward the cassette 301.

In this state, the transfer unit 32 is lowered toward the mono-cell body, and the suction plate 322 sucks the mono-cell body placed on the upper surface of the pickup body 311. Then, after the adsorption plate 322 adsorbs the monocell body, the transfer unit 32 ascends to the home position. Then, the transfer unit 32 moves in the horizontal direction in the state of adsorbing the monocell body, and moves to the alignment section D.

Meanwhile, the elevation part 302 descends toward the cassette 301 while the transfer unit 32 is moved back to the alignment part D. Then, the adsorbing portion 312, which is on the upper surface and rotated to the lower surface, adsorbs one monocell body. Of course, a vibration process is performed after the adsorption. The driving motor 314 may be rotated 180 degrees in a direction opposite to the direction of rotation in the previous monocell body adsorption process so that the adsorbed monocell body is positioned on the upper surface of the pickup body 311 . This is because, when the drive motor 314 rotates only in one direction, the lead wire extending along the inside of the rotation shaft 313 may be twisted and broken. Of course, it is also possible to rotate the drive motor 314 only in one direction if the lead wire does not twist, and it is also within the scope of the present invention that the drive motor 314 rotates 180 degrees in one direction Leave.

For reference, although not specifically described with respect to the drive means or the guide rail and the guide post structure that enable the horizontal and vertical movement of the transport units described below, A description will be given on the assumption that a means is provided.

 11 is an enlarged perspective view of an aligning portion and a membrane cutting portion which constitute a membrane cutting apparatus according to an embodiment of the present invention.

11, the transfer unit 32 that has sucked the monocell body is conveyed to the alignment section D, and the monocell body is precisely aligned at the cutting position in order to accurately cut the separation membrane of the monocell body. An alignment process is performed.

As an example for aligning the monocell matrix, a method may be used in which the straight edges of the monocell matrix or the tab edges of the monocell matrix are accurately positioned on the reference line.

In detail, the alignment section D may include a vision camera 33 and an alignment stand 34. [

The separating membrane cutting portion E includes a cutting unit 37, a supply unit 38 for sucking the monocell body to be cut and drawing it into the cutting unit 37, And a transfer stand 35 for transferring the inspection result to the defect inspection portion F. [

The alignment stand 34 and the transfer stand 35 may be mounted on a transfer means such as the standmover 36 so as to move in a single body. Alternatively, the alignment stand 34 and the transfer stand 35 may move independently of each other and simultaneously move in the same direction, thereby achieving the same effect as moving in one body.

More specifically, the vision camera 33 constituting the alignment section D is disposed between the pick-up section C and the aligning stand 34, Take an image of the cell. The control unit (not shown) extracts the alignment information of the mono cell based on the photographed image information.

In other words, the photographed image information is analyzed to determine how far the position of the mono cell body adsorbed on the transporting body 321 in the pick-up section C is from the cutting position set in the cutting section E Can be determined.

The edges of the mono cells or the edges of the tabs must be accurately aligned with the baseline so that the separator can be cut along the designed cutting line. When the monocell body is drawn into the cutting device in a state where the monocell body is not aligned in the correct position for cutting, the separation membrane portion to be cut may not be cut but may be cut to the electrode portion, Can be cut.

In order to prevent such a phenomenon, the vision camera 33 takes an image of the monocell matrix adsorbed on the bottom surface of the transporting body 321 of the transporting unit 32, and transmits the shot image to the control unit.

On the other hand, when the alignment value is calculated in the controller based on the image of the monocell matrix, the alignment information is transferred to the alignment stand 34 to move the alignment stand 34. Of course, it is also possible that the transfer body 321 of the transfer unit 32 receives alignment information to align the monocell matrix and then lower the monocell to the alignment stand 34.

The alignment stand 34 includes an alignment table 341 on which the monocell matrix transferred from the transfer unit 32 is seated and an alignment table 341 on which the monocell matrix is aligned with a reference line. And an alignment driving unit 342 for driving the light emitting diodes. As shown in the drawing, the alignment table 341 is arranged on the horizontal plane in the x-axis direction (the same direction as the moving direction of the aligned stand 34) and the x- Axis, and is rotatable about a vertical axis (which may be defined as a z-axis) orthogonal to the horizontal plane by a predetermined angle [theta]. That is, according to the alignment value calculated based on the image photographed by the vision camera 33, the alignment table 341 can be rotated about the horizontal straight line in the x-axis and y-axis and the vertical angle around the vertical axis have.

According to this configuration, when the transfer unit 32 moves to the upper side of the alignment stand 34, the alignment table 341 is operated by the alignment drive unit 342. When the alignment of the alignment table 341 is completed, the transfer unit 32 places the monocell matrix on the alignment table 341 and returns to the pick-up unit C. When the monocell body is placed on the alignment table 341, the alignment table 341 returns to the state before the alignment operation. Then, the monocell body is aligned at an accurate cutting position, and in this state, the monocell body is transported to the separator cutting portion E.

In the transfer stand 35 located on the side of the alignment stand 34, a cut mono cell is placed. In this state, the standmover 36 is transported in the x-axis direction, and the aligning stand 34 is transferred to the separating membrane cutting portion E. The transferring stand 35 is connected to the defect inspection portion F, Lt; / RTI &gt;

On the other hand, on the alignment stand 34 which has been transferred to the separator cutting portion E, the mono cell accurately aligned at a position for cutting is placed. The transfer stand 35 may be provided in the same number as the alignment stand 34.

The supply unit 38 constituting the separation membrane cutting portion E includes a suction plate 382 and a transfer body 381 for moving the suction plate 382 in the horizontal and vertical directions.

The cutting device 37 may include a fixing portion 371 and a cutting portion 372. When the cutting portion 372 descends and contacts the fixing portion 371, But is not limited to, a punching machine that cuts unwanted separators. A plurality of monocell bodies may be introduced into the cutting unit 37 at a time, and a plurality of monocell bodies may be supplied to the cutting unit 37 at a time.

In detail, in a state in which the aligning stand 34 has been fed, the feeding unit 38 moves to a position right above the aligning stand 34. [ Then, the attracting plate 382 descends to attract the monocell matrix placed on the alignment table 341. Then, after the supply unit is lifted in a state of adsorbing the monocell body, the substrate moves horizontally toward the cutting device (37). Here, while the monocell matrix is adsorbed by the attracting plate 382 and the feeding unit 38 is moved up and horizontally, the standmover 36 horizontally moves back to its original position. Then, the alignment stand 34 returns to the alignment portion D, and the transfer stand 35 returns to the separation membrane cutting portion E.

Meanwhile, while the standmover 36 is moving, the feeding unit 38 feeds the monocell body to the cutting device 37 and moves horizontally and vertically again when the cutting is finished. Here, in the cutting step, the monocell is adsorbed on the adsorption plate 382 of the supply unit 38. [

However, the present invention is not limited thereto. When the monocell body is supplied to the cutting unit 37, the monocell body may be separated from the suction plate 382 of the supply unit 38. When the cutting process is completed, the feeding unit 38 advances, and the mono cell that has been cut is sucked again to move to the feeding stand 35 .

The portion of the separation membrane cut by the cutting device may be a curved or curved line rather than a straight line.

After the cutting process is completed, the mono cell is transferred to the transfer stand 35 by the supply unit 38, and is then placed on the transfer stand 35. In this state, the standmover 36 moves again, and sends the cut mono cells to the defect inspection portion F. [

12 is an enlarged perspective view of a defect inspection unit constituting a separation membrane cutting apparatus according to an embodiment of the present invention.

Referring to FIG. 12, the defect inspection unit F may include a vision camera 39 and a discard box 41.

In detail, the monocell transferred to the defect inspection part F in the state of being placed on the transfer stand 35 is photographed by the vision camera 39 to judge whether it is defective or not. The vision camera 39 is located at a height spaced a predetermined distance from the upper surface of the transfer stand 35 in order to photograph a mono cell placed on the transfer stand 35.

Based on the image information photographed by the vision camera 39, it is judged whether or not the separation membrane of the mono cell has been cut exactly as designed. Therefore, the monocells having undergone the membrane-cutting process are separated into good and defective products by passing through the imaging region by the vision camera 39. [

On the other hand, a stacking transfer unit 40 is disposed between the defect inspection unit F and the loading unit G. [ The loading / transporting unit 40 may be defined as a component of the loading unit G. [ The loading transfer unit 40 reciprocates between the defect inspection unit F and the loading unit G to transfer the mono cells whose defect inspection has been completed. Like the other transfer units, the loading transfer unit 40 may include a transfer body 401 and a suction unit 402.

More specifically, the loading transfer unit 40 is transferred to the upper side of the transfer stand 35 in a state where the transfer stand 35 is moved to the failure inspection unit F. Then, the transfer body 401 is lowered, and the sucking unit 402 sucks the monocell placed on the transfer stand 35.

When the monocell is adsorbed on the adsorption unit 402, the transfer body 401 moves up to the loading unit G after the transfer body 401 is elevated. And passes through the upper space of the waste container 41 in the process of being transferred to the loading section G by the loading transfer section 40. The adsorbing portion 402 adsorbing the monocell determined to be defective among the plurality of adsorbing portions 40 constituting the stacking conveying portion 40 is configured to adsorb an adsorbing force Lt; / RTI &gt; Then, the defective mono cell drops to the waste box 41, and only the mono cells determined to be good are transferred to the loading box G.

 13 is an enlarged perspective view of a loading unit constituting a separation membrane cutting apparatus according to an embodiment of the present invention.

13, the stacking unit G constituting the membrane cutting apparatus according to the embodiment of the present invention includes one or a plurality of cassettes 42 on which monocells of good products are stacked, And a stacking unit 43 for taking over the good mono-cells transferred by the stacking unit 40 and loading the same on the cassette 42.

More specifically, the loading unit 43 includes a driving motor 431 capable of normal and reverse rotations, a rotating plate 432 rotated by the driving motor 431, and a suction unit 433 provided on both surfaces of the rotating plate 432 ).

In the present embodiment, a plurality of the loading units 43 are shown as being driven independently by the respective driving motors. However, the present invention is not limited to this, and the loading unit 43 may be mounted on the pick- (31). Then, the loading unit 43 can operate in the same manner as the pick-up unit 31.

The lower surface of the mono cell adsorbed on the adsorption unit 402 is brought into contact with the adsorption unit 433 formed on the upper surface of the rotary plate 432 of the loading unit 43 do. In this state, the adsorption force of the adsorption unit 402 is released and the adsorption force acts on the adsorption unit 433 of the loading unit 43. Then, the loading / conveying unit 40 moves up and horizontally and returns to the failure checking unit F. [

The driving motor 431 is driven to rotate the rotating plate 432 by 180 degrees in a state where the mono cell is attracted to the suction unit 433 so that the mono cell is moved toward the cassette 42 . Then, the stacking unit 43 is lowered and the suction force of the suction unit 433 is released, so that the mono cell is loaded on the cassette 42. [

Then, the monocells stacked on the cassette 42, that is, the monocells of the good product from which the separator is cut, are transferred to a device for the cell stacking and thermo-compression process.

14 is a perspective view of a cell stacking and thermocompression bonding apparatus according to an embodiment of the present invention.

Referring to FIG. 14, the mono cells having the separator portion cut at the edge of the electrode in the separator cutting device 30 are stacked while passing through a plurality of working portions provided in the cell stacking and thermo-compression bonding device 50, So that the secondary battery cell product is completed.

Specifically, the cell lamination and thermocompression bonding apparatus 50 is composed of stacked portions H1 to H4, a thermocompression bonding portion J, an inspection portion K, and a loading portion L. [ One or a plurality of the stacked portions may be provided depending on the shape and size of the stacked mono cells. In this embodiment, the lamination portion is shown as being composed of the first to fourth lamination portions H1 to H4.

In order to manufacture the secondary battery cell of the type shown in FIG. 2, three types of mono cells must be sequentially stacked, so that three stacked portions can be continuously arranged. In other words, the third mono cell 13 having the largest size and the highest stacking height is stacked in the first stacking portion H1, and the medium sized second mono cell 12 is stacked in the second stacking portion H2, and the uppermost first mono cell 11 may be laminated in the second lamination portion H3. Then, the mono cells having been stacked are transferred to the thermocompression bonding portion J.

In addition, a plurality of cassettes on which monocells of the same kind are stacked may be disposed in the respective lamination portions, but the present invention is not limited thereto. The configuration of each laminated portion is the same regardless of the type of the laminated portion, and the working process is also the same. Therefore, only one of the laminated portions will be described as an example.

FIG. 15 is a flowchart sequentially showing a stacking process in a cell stacking and thermocompression bonding unit according to an embodiment of the present invention.

15, the laminating process (or process) of the cell lamination and thermocompression bonding unit according to the embodiment of the present invention is performed such that the monocells stacked on the plurality of cassettes moved in the membrane- A step S42 of picking up the image of the mono cell picked up by the vision camera, a step S43 of aligning the mono cell based on the image information of the picked up mono cell, (S44) in which the phosphorous mono-cells are stacked, and a step (S45) in which the stacked mono-cell assemblies are transferred to the thermocompression region.

Hereinafter, the process of performing the steps S41 to S45 will be described in detail with reference to the drawings.

FIGS. 16 to 18 are views showing a configuration of a cell stacking and thermocompression bonding apparatus in which a monocell laminating process according to an embodiment of the present invention is performed.

16, the cassettes 501 on which the separator-cut mono cells are stacked are picked up one by one by the pick-up unit 51, and the picked-up mono cells are picked up by the transfer unit 52, Lt; / RTI &gt;

Specifically, the pickup unit 51 includes a pickup body 511, a rotary shaft 513, a drive motor 514 connected to the rotary shaft, and a plurality of suction / (512). The pickup unit 51 has the same configuration and function as that of the pick-up unit 31 provided in the pick-up unit C of the film separator 30. That is, the pickup body 511 is rotated 180 degrees in the forward and reverse directions about the rotation axis 513 by the drive motor 514, and the monocell stacked on the cassette 501 is transferred to the transfer unit 52 It can be said that the feeding operation is the same as the functions of the pick-up unit 31 and the feed unit 32 provided in the pick-

Although the specific shape and size may be different, it can be said that the operation mechanism and the function are the same. Of course, the pick-up unit 51 also performs an operation of vibrating in a state in which the mono-cells are attracted to prevent multiple sheets from being picked up together.

Meanwhile, the transfer unit 52 may include a transfer body 522 and a suction plate 521. The transfer unit 52, which has passed the mono cell from the pick-up unit 51, moves to the next area for stacking and passes through the shooting area of the vision camera 53 in the course of movement.

The monocell adsorbed to the transfer unit 52 is photographed while passing through the vision camera 53, and the alignment information (or the alignment coordinates) of the monocell is calculated based on the image information of the photographed monocell. After passing through the vision camera 53, the transfer unit 52 is transferred to the upper region of the alignment stand 54. [

In detail, the alignment stand 54 may include an alignment table 541 and an alignment driver 542 for driving the alignment table 541. Since the configuration and functions of the alignment stand 54 are the same as those of the alignment stand 34 constituting the separation membrane cutting device 30, a duplicate description thereof will be omitted.

On the other hand, after the alignment table 541 moves on the x- and y-axes or rotates about the vertical axis (z-axis) based on the alignment information, the transfer unit 52 transfers the alignment table 541, And puts the mono cell on. When the monocell is seated on the alignment table 541, the alignment table 541 returns to the state before alignment. Then, the transfer unit 52 returns to the original position where the pick-up unit 51 is located, and then another transfer unit 55 is transferred to the alignment table 541 side.

It is noted that the alignment process performed here is performed not for the purpose of precisely cutting the membrane of the monocell but for the purpose of stacking a plurality of monocells at the correct position.

17 and 18, the monocells 11 laid on the alignment table 541 are transported to the cell jig 58 by another transport unit 55. As shown in Fig.

In detail, the conveying unit 55 can be composed of the conveying body 552 and the attracting plate 551 (or the attracting portion) like the conveying units previously described. The mono cells aligned at the alignment position are sucked by the transfer unit 55 and transferred to the cell jig 58 whose top surface is flat as shown in Fig. A lower arm receiving groove 581 for receiving the lower arm 601 is formed on the upper surface of the cell jig 58.

A plurality of mono cells are stacked on the cell jig 58, and new mono cells transferred by the transfer unit 55 are stacked on the upper surfaces of the stacked mono cell assemblies.

When the new mono cell is stacked, the top surface of the mono cell is pressed by the structure of the gripper 56 to prevent the mono cell from shaking or shifting. When the gripper 56 presses the uppermost surface of the mono-cell laminate, the transfer unit 55 releases the attraction force and returns to the alignment stand 541.

More specifically, the gripper 56 presses the upper surface of the mono-cell stack stacked on the cell jig 58 until the mono-cell is transported toward the cell jig 58 by the transfer unit 55 It remains in the state that it is. When the transfer unit 55 is lowered and the mono cell is placed on the uppermost surface of the mono cell laminate, the gripper 56 horizontally moves to the outside of the mono cell laminate, Escape. Then, after ascending to the upper side, it moves horizontally toward the mono cell stack body again, and presses the upper surface of the newly stacked mono cell. Thereafter, the attraction force of the conveyance unit 55 is released and the conveyance unit 55 is raised.

The gripper 56 may be formed in the form of a pair of robot arms, horizontally moving in a direction away from each other, horizontally moving in a direction approaching each other after being raised by the height of one mono cell. Then, the gripper 56 descends to push the upper surface of the mono-cell stack. The upward and downward movement and the horizontal movement of the gripper 56 are repeatedly performed each time a single mono cell is transferred.

When the set number of mono cells is stacked in the stacking unit and the mono cells are stacked by the set height, the mono cell stack is transferred to the next stacking unit or transferred to the thermo-compression unit.

In order to prevent the stacked mono cells from collapsing when the mono cell stack is moved, a member such as a clamp 57 is conveyed while pressing the mono cell stack. In other words, a clamp 57 is provided at the edge of the cell jig 58. The clamp 57 is mounted movably in the vertical direction from the upper surface of the cell jig 58, or is rotatably mounted.

When the stacking of the mono cells in the stacking portion is completed, the clamp 57 operates to press the upper surface of the mono cell stacked body. In this state, the gripper 56 ascends from the upper surface of the mono-cell laminate and horizontally moves to the outside of the mono-cell laminate. Then, the cell jig 58 and the clamp 57 move in a single body while the clip 57 presses the monocell laminate.

Hereinafter, a thermocompression bonding part for thermocompression bonding a stacked monocell laminate will be described in detail with reference to the drawings.

 FIG. 19 is a flowchart sequentially illustrating the thermocompression bonding process performed in the cell lamination and thermocompression bonding apparatus according to the embodiment of the present invention.

Referring to FIG. 19, a thermocompression bonding process for manufacturing a secondary cell according to an embodiment of the present invention includes a prepress step S51 of a mono-cell stack transferred from a lamination part, A main press step S52 of the mono cell laminate, a final press step S53 of the mono cell laminate through the main press step, and a compression step of pressing the completed secondary battery cell A step S54 of taking a vision camera, a step S55 of measuring a thickness of a secondary battery cell through a vision camera shooting step, a step S56 of measuring a shortness of a secondary battery cell through a thickness measuring step, (S57) of discarding defective ones of the rough secondary battery cells and loading only good ones.

Hereinafter, the steps S51 to S57 will be described in detail with reference to the drawings.

20 is an enlarged perspective view showing a pre-press section and a main press section constituting the cell laminating apparatus and the thermocompression apparatus according to the embodiment of the present invention.

Referring to FIG. 20, the mono cell stacks passing through the stacking step are transferred to the pre-press section J1 while being placed on the cell jig 58. As shown in FIG.

In detail, the press apparatuses 59 constituting the pre-press section J1 and the main press section J2 are identical and differ only in the temperature and pressure of the heat applied in the pressing step. Therefore, only the press apparatus 59 constituting the pre-press section J1 will be described as a representative.

In the pre-press section J1, the mono-cell laminate is compressed with heat and weak air pressure to the mono-cell laminate, and the main-press section J2 presses the weakly pressed mono cell laminate again with heat and high hydraulic pressure.

21 is an enlarged perspective view showing a device for putting a mono-cell laminate into a press device.

Referring to FIG. 21, a holding clamp 60 for picking up the monocell laminated body 10a and guiding the inside of the press apparatus 59 is disposed on the opposite side of the press apparatus 59. As shown in FIG.

More specifically, the monocell laminated body is gripped by the holding clamp 60 when it is pushed by the clamp 57 on the cell jig 58 and is conveyed to the press area where the press apparatus is.

The holding clamp 60 may have a robot arm structure capable of moving up and down and moving in the forward and backward directions. The holding clamp 60 includes a transfer body 603, a pair of arm rails 604 extending in the vertical direction from the left and right sides of the transfer body 603, A pair of upper arms 602 provided on the pair of arm rails 604 and a pair of lower arms 604 mounted on the pair of arm rails 604 below the pair of upper arms 602, (601).

The lower arm 60 is fixed to the arm rail 604 and the upper arm 602 can be slidably moved in the vertical direction in a state where the upper arm 602 is connected to the arm rail 602.

The cell jig 58 is stopped when the clamp 57 is positioned in the space between the pair of upper and lower arms 602 and 601. Therefore, even if the holding clamp 60 advances toward the press device 59, the clamp 57 does not interfere with the holding clamp 60.

In order for the holding clamp 60 to grasp the mono cell laminate, the lower arm 601 and the upper arm 602 are spaced apart from each other by an interval larger than the thickness of the mono cell laminate, And moves to the jig 58.

Therefore, the holding clamp 60 can be advanced until the front end of the lower arm 601 comes into contact with the end of the lower arm receiving groove 581. Here, it is not necessary to advance the end of the lower arm 601 until it reaches the end of the lower arm receiving groove 581, and the holding clip 60 can stably hold the mono-cell laminate It may be inserted only to a certain depth.

Specifically, in a state where the lower arm 601 is fully inserted into the lower arm receiving groove 581, the upper arm 602 descends to press the mono-cell laminate. Then, the holding clamp 60 is in a state in which it can pick up the mono-cell laminate. In this state, the clamp 57 ascends and separates from the upper surface of the mono cell laminate. The holding clamp 60 is also lifted until the lower arm 601 moves out of the lower arm receiving groove 581 of the cell jig 58.

Then, the holding clamp 60 advances until the rear end of the mono-cell laminate is out of the front end of the clamp 57. In this state, the front surface of the transporting body 603 constituting the holding clamp 60 is kept spaced apart from the clamp 57.

Then, when the mono cell laminated body is out of the rising and falling range of the clamp 57, the clamp 57 descends and returns to the home position. Then, the upper surface of the clamp 57 is spaced apart from the bottom surface of the transporting body 603. In this state, the holding clamp 60 further advances so that the mono-cell laminate is advanced to the compression bonding position formed inside the press device 59.

The pressing device 59 is disposed at a position higher than the upper surface of the cell jig 58 so that the clamp 57 returns to its original position and then the holding clamp 60 presses the pressing device 59 It may be designed to further advance to the entrance height and then advance.

FIG. 22 is a perspective view of a press apparatus according to an embodiment of the present invention, and FIG. 23 is a bottom perspective view of a press upper constituting the press apparatus.

22 and 23, the press apparatus 59 according to the embodiment of the present invention includes a press lower 591 on which a mono-cell laminate is placed, And a press upper 592 provided on the upper side to be movable up and down. Of course, although not shown, pneumatic or hydraulic pressure acts on the press upper 592 to press the press lower 591 strongly.

Heat lines are embedded in the bottom surface of the press upper 592 and the upper surface of the press lower 591 to heat the mono cell laminate.

A lower arm receiving groove 591a is formed on the upper surface of the presser lower 591 and the lower arm receiving groove 591a is formed in the same shape and function as the lower arm receiving groove 581 formed in the cell jig 58 Do. That is, it is a groove for receiving the lower arm 601 of the holding clamp 60.

Further, a pattern (or frame) 592a corresponding to the shape of the secondary battery cell after completion of the pressing process is formed on the bottom surface of the presser upper 592. Therefore, the secondary battery cell will be formed in a shape corresponding to the shape of the frame formed on the bottom surface of the press upper 592.

The lower surface of the press upper part 592 at a position corresponding to the lower arm receiving groove 591a is formed with a lower arm skin 592a having the same shape as the lower arm receiving groove 591a.

In detail, since the lower arm receiving groove 591a of the press lower 591 is separated from the bottom surface of the mono-cell laminate, heating and pressing are not performed. In this state, if there is no lower arm skin 592b on the press upper 592, when the pressing process is completed, the bottom surface of the secondary battery cell corresponding to the lower arm receiving groove 591a protrudes downward Will be.

In the portion corresponding to the position of the lower arm receiving groove 591a, thermocompression acts only on the upper surface of the mono-cell laminate, and thermocompression acts on both surfaces of the mono-cell laminate at the other portions . As a result, there is a high possibility that a defective battery cell is produced. Therefore, in order to prevent such a problem, the presser upper 592 is formed so as to be recessed in the bottom surface of the lower arm receiving groove 592b having the same shape.

On the other hand, the holding clamp 60 advances while holding the mono-cell laminate, and the mono-cell laminate is placed on the upper surface of the press roe 591. After the upper arm 602 of the holding clamp 60 is raised, the holding clamp 60 is retracted and the press upper 592 is lowered to press the mono-cell laminate together with the heat at a predetermined pressure. Then, the plurality of stacked mono cells are squeezed together to form a single secondary battery cell.

On the other hand, when the pre-press process and the main press process are completed, the mono-cell laminate is formed into one secondary battery cell. However, the upper surface of the secondary battery cell corresponding to the lower arm receiving groove 591a protrudes in the size and shape of the lower arm receiving groove 591a.

Therefore, when the pre-press process and the main press process are completed, the secondary battery cell is transferred to the final press area for thermally pressing the protrusion corresponding to the shape of the lower arm receiving groove 591a.

On the other hand, when the prepress or main press process is completed, the cell jig 59 is moved to the next stage after the mono cell stack or the secondary battery cell is transferred from the press device 59 to the cell jig 59 .

At this time, the mono-cell stack or the secondary battery cell inside the press device 59 is held again by the holding clamp and transferred to the upper surface of the cell jig 58.

24 is an enlarged perspective view showing a final press area of the lamination and thermocompression bonding apparatus according to the embodiment of the present invention.

Referring to FIG. 24, the secondary battery cell manufactured while passing through the pre-press and the main press is moved in the arrow direction while being placed on the cell jig 58 and is transferred to the final press portion J3.

In detail, the final press portion J3 is located on the side of the main press portion J2 to allow the cell jig 58 to move linearly. As shown in the drawing, the main press portion J2 And then the path of travel may be switched 90 degrees.

In addition, in the pre-press process, the main press process and the final press process, the holding clamp can grip the mono-cell laminate and transfer it into the press device. In the final press process, (Or the secondary battery cell) to the inside of the final press device. Hereinafter, the mono cell laminate is supplied into the final press device 60 by a separate transfer unit.

The secondary battery cell 10a that has passed through the main press process and is placed on the cell jig 58 and transferred to the inlet of the final press device 61 is adsorbed by the transfer unit 62. [ Before that, the clamp 57, which has pressed the secondary battery cell 10a, moves up to be separated from the upper surface of the secondary battery cell 10a.

In this state, the transfer unit 62 sucks the secondary battery cell 10a and guides the secondary battery cell 10a into the final press device 61. Here, the transfer unit 62 may be a suction type transfer member having the suction unit (or suction plate) described above.

The final press apparatus 61 may include a press lower 611 and a press upper 612. The press upper 612 is provided to be movable upward and downward. This is the same as the configuration of the press apparatus 59 provided in the pre-press section J1 or the main press section J2. However, the bottom surface of the presser upper 612 and the top surface of the presser foot 611 differ in that they have a smooth flat surface without depressed portions.

The transfer unit 62 transfers the secondary battery cell 10a laid on the cell jig 58 in a state in which the presser upper 612 rises and is spaced from the presser 611, And is seated on the lower 611. Then, the baby feeding unit 62 returns to the home position.

In this state, the presser upper 612 is lowered to press the upper surface of the secondary battery cell with heat and pressure. Then, a portion protruding in the shape of the lower arm receiving groove is pressed on the upper surface of the secondary battery cell. The protruded portion is pressed and held at the same height as the upper surface portion of the secondary battery cell. Here, the upper surface portion of the secondary battery cell means the upper surface of the uppermost mono cell laminated portion. That is, when passing the final press process, the upper surface of the protruded portion becomes flush with the upper surface of the portions pressed by the main press portion, and one complete secondary battery cell is formed.

 25 is a view showing a process of inspecting a secondary battery cell that has undergone the thermocompression process.

25, one complete secondary battery cell as shown in FIG. 2 is completed when passing through the final press portion J3, and the secondary battery cell 10 is transferred to another transfer unit 63 And is guided to the conveyance belt 64 for inspection. The another transfer unit 63 may be a transfer unit of the same type as the transfer unit 62 provided in the final press section.

When the secondary battery cell is transferred to the transfer belt 64 by the transfer unit 63, the secondary battery cell 10 is inspected along the transfer belt 64 while moving to the inspection unit K . That is, shape inspection by the vision camera, thickness inspection and short inspection are sequentially performed.

That is, it is judged whether the secondary battery cell is stacked and thermocompression-bonded properly by being photographed while passing through the vision camera 65. For example, in the stacking process, it is judged whether or not the mono cells are pushed to the side so that the sides of the cells do not form a vertical plane and are not inclined obliquely, or whether the mono cell stack is not sideways in the process of thermocompression .

Then, the secondary battery cell having passed through the vision camera 65 is transferred to the thickness measuring unit 66, and it is determined whether or not the designed thickness is well-pressed. The secondary battery cell having passed through the thickness measuring unit 66 is transferred to the short-circuit inspecting unit 67, and it is judged whether or not the short-circuiting phenomenon is caused by the electrode parts sticking in the thermocompression bonding process.

26 is an enlarged perspective view of a stacking portion constituting a cell stacking and thermocompression bonding portion according to an embodiment of the present invention.

Referring to FIG. 26, it is determined whether or not a failure has occurred in each of the secondary battery cells while passing through the short checker 67. Then, the secondary battery cell determined to be defective continues to move along the conveyance belt 64 to be collected (not shown). Conversely, the secondary battery cell determined as good is picked up by the pick-up unit 68 and loaded on a separate cassette.

The secondary battery cell determined as a good product through this series of processes is moved to a packaging process in which the secondary battery cell is packed by the pouch and the electrolyte is injected. Since the processes after the packaging process are the same as those applied to the conventional secondary battery cell manufacturing process, detailed description will be omitted.

Claims (7)

An electrode part notching step of cutting the edge of the electrode part into a designed shape;
A step of inserting a plurality of electrode parts and a separation membrane into a laminae in a state that the electrode parts and the separation membrane are sequentially laminated and pressing them into a single body, and cutting the electrode part and separation part of the separation membrane, which are drawn out from the laminator, An electrode lamination step comprising;
Cutting a part of the separation membrane of the mono-cell body along the edge of the electrode part to form a mono cell corresponding to the designed shape of the electrode part;
A mono-cell stacking step of stacking a plurality of mono cells cut with a separator;
A thermocompression bonding step of compressing a mono cell laminate comprising a plurality of mono cells stacked by heat and pressure;
And a packaging step of wrapping the battery cells completed by thermocompression in a pouch and packaging the battery cells. The method according to claim 1,
Wherein the separating membrane cutting step includes an aligning step of aligning the monocell matrix to a reference line so as to cut the separator precisely along a cut line. 3. The method of claim 2,
Wherein the cutting line of the separator cut in the separator cutting step includes a curved or bent straight line. The method according to claim 1,
Wherein the mono-cell stacking step includes stacking mono-cells having different sizes or shapes. 5. The method of claim 4,
Wherein the mono cells having different sizes or shapes are stacked to form a stepped top surface. The method according to claim 1,
The thermocompression-
A pre-press step of pressing the mono-cell laminate with low heat and pressure,
A main press step in which the pre-press step is performed with high heat and pressure, and
And a final pressing step of finally pressing the uncompressed portion after the main pressing step. The method according to claim 1,
Further comprising a tap welding step of welding the tabs of the thermocompression-bonded battery cells as a single body.

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