KR102638743B1 - Tab cutting apparatus of secondary cell - Google Patents

Abstract

The present invention relates to an electrode tab cutting device, and to a device for cutting the anode and cathode portions of the electrode tab of an electrode/separator assembly, respectively.
The present invention was created to achieve the object of the present invention as described above, and the first electrode sheet 14 and the second electrode sheet 13 are alternately stacked with a separator 15 interposed thereto, forming a pair of electrodes. An electrode tab cutting device for an electrode/separator assembly (2) including tabs (11, 12), comprising a pair of cutting members (121) for cutting the electrode tabs (11, 12) of the electrode/separator assembly (2). and; An electrode tab cutting device 120 is disclosed, which includes a driving unit 122 for driving the cutting member 121 up and down.

Description

Electrode tab cutting device {Tab cutting apparatus of secondary cell}

The present invention relates to an electrode tab cutting device, and to a device for cutting the anode and cathode portions of the electrode tab of an electrode/separator assembly, respectively.

In general, secondary cells are mainly used in places that use high power, such as portable devices, tools, and uninterruptible power supplies. In particular, they are widely used in the field of electric vehicles to suppress greenhouse gas emissions and reduce income sources.

Recently, as the utility of electric vehicles has been highlighted and the commercialization of electric vehicles is approaching, the specifications of secondary batteries, which were previously applied only to small electronic products, are becoming significantly larger. As a result, secondary batteries are becoming larger and released in various sizes and forms. It is difficult to respond with existing secondary battery manufacturing equipment and manufacturing processes.

Therefore, in line with the trend toward larger secondary batteries, there is a need for automated equipment and processes that can process secondary batteries of various sizes and shapes.

Among them, the pouch-type secondary battery goes through a packaging step in which an electrode assembly including a negative electrode, a separator, and an anode is placed in a pouch-type packaging material, an electrolyte is injected, and the edges are sealed, followed by a charging/discharging step and a degassing step.

When performing this packaging step, there is a difference in the speed of the device for welding the electrode tab, the electrolyte injection device, and the sealing device, which affects the speed of the overall package process, resulting in a decrease in production efficiency per unit time.

Meanwhile, in a pouch made of a nylon layer, an aluminum layer, and a PP layer (poly propylene) that forms the inner surface of the pouch, if a scratch or dent occurs in the PP layer, the electrode assembly and the pouch may be short-circuited in that area.

Additionally, if the lead film provided between the sealing area of the pouch and the lead tab to prevent the flow of current between the pouch and the lead tab is damaged or defective, the lead tab and the pouch may be short-circuited at that part.

The purpose of the present invention is to provide a device for cutting the electrode tab of a secondary battery cell, and specifically, to provide a device for cutting the electrode tab corresponding to the anode and cathode portions of the electrode tab of the electrode/separator assembly as a single device. There is.

The present invention was created to achieve the object of the present invention as described above, and the first electrode sheet 14 and the second electrode sheet 13 are alternately stacked with a separator 15 interposed thereto, forming a pair of electrodes. An electrode tab cutting device for an electrode/separator assembly (2) including tabs (11, 12), comprising a pair of cutting members (121) for cutting the electrode tabs (11, 12) of the electrode/separator assembly (2). and; An electrode tab cutting device 120 is disclosed, which includes a driving unit 122 for driving the cutting member 121 up and down.

The electrode tabs 11 and 12 of the electrode/separator assembly 2 may be fixed and include a guide portion 123 that allows them to be cut by the cutting member 121.

It is preferable that the cutting member 121 forms a certain angle with respect to the plate surface of the electrode/separator assembly 2.

The cutting member 121 is composed of a pair and corresponds to the cathode portion 11 and the anode portion 12 of the electrode tabs 11 and 12, and simultaneously includes the cathode portion 11 and the anode portion 12 of the electrode tabs 11 and 12. The anode portion 12 can be cut separately, and each pair of cutting members 121 can be made of different metals.

The secondary battery cell manufacturing equipment system according to the present invention has the advantage of increasing production efficiency per unit time by improving the speed of the overall package process.

Specifically, compared to the conventional device that originally welded the positive and negative electrode tabs of the secondary battery cell in two modules, the positive and negative electrode tabs of the secondary battery cell can be welded in one module, making the welding process simpler than before. It has the advantage of improving speed.

In addition, by including a turntable device in the lead tab combination module, the positive and negative electrode tabs of the secondary battery cell can be welded in one module, which has the advantage of improving the speed of the welding process compared to the conventional method.

In addition, it has the advantage of improving the manufacturing speed of secondary battery cells by transferring the electrode/separator assembly to minimize interference when loading the electrode/separator assembly into the lead tab combination module.

In addition, conventionally, the lead tab combination module includes a device for cutting the electrode tabs of the electrode/separator assembly according to the cathode portion and the anode portion, but the present invention divides the cutting member into one cutting device to form the cathode portion of the electrode tab. It has the advantage of improving the manufacturing speed of secondary battery cells by cutting the and anode parts together.

In addition, by molding the pouch into which the electrode/separator assembly is inserted before the joining process, the electrode/separator assembly can be more easily inserted into the pouch, and separate alignment is not required, improving the manufacturing speed of secondary battery cells. It has the advantage of doing so.

In addition, defects can be minimized by conducting an insulation measurement test to determine whether defects occurred in the stacking process, tab welding process, or pre-sealing process before pouring liquid into the secondary battery cell. By pressing the secondary battery cell and measuring the insulation, foreign matter is removed. It has the advantage of being able to check whether the light has been inserted and check the function of the separator.

Figure 1 is a top view of a pouch-type secondary battery cell.
Figure 2a is a cross-sectional view of a pouch-type secondary battery cell, and Figure 2b is a conceptual diagram of an electrode/separator assembly.
Figure 3 is a block diagram of a secondary battery manufacturing system.
Figure 4 is a plan view of the lead tab combination module.
Figure 5a is a side view of the transfer part of the electrode/separator assembly loading device, and Figure 5b is a front view of the transfer part of the electrode/separator assembly loading device.
Figures 6 and 7 are a top view and a side view showing the process of loading the electrode/separator assembly in the electrode/separator assembly loading device.
Figures 8 and 9 are plan and side views showing the alignment process of the electrode/separator assembly loading device.
FIG. 10A is a front view of the electrode tab cutting device of the lead tab coupling module, and FIG. 10B is a side view of the electrode tab cutting device of the lead tab coupling module.
Figure 11a is a conceptual diagram of the pouch forming module, and Figures 11b and 11c are plan views and perspective views of the formed pouch.
FIG. 12A is a side view of the insulation resistance measurement device, and FIG. 12B is a top view of the insulation resistance measurement device.

Hereinafter, the electrode tab cutting device according to the present invention will be described in detail with reference to the attached drawings.

The secondary battery manufacturing system according to the present invention includes an electrode/separator assembly 2 in which first electrode sheets 13 and second electrode sheets 14 are alternately stacked with a separator 15 interposed therebetween, and an electrode/separator assembly. The assembly (2) is connected to the pouch (4) impregnated with an electrolyte solution and a pair of electrode tabs (11, 12) of the electrode/separator assembly (2), respectively, and protrudes to the outside of the pouch (4). A secondary battery manufacturing system for manufacturing a secondary battery cell (1) including a pair of lead tabs (31, 32) forming electrode terminals, comprising: a pair of electrode tabs (11, 12) of the electrode/separator assembly (2); 12) a lead tab coupling module (100) that welds lead tabs (31, 32) to each other; A pouch combination module 200 forming a secondary battery cell 1 in a structure in which an electrode/separator assembly 2 is inserted into the inside of a pouch 4; a liquid injection module (300) for injecting electrolyte into the pouch (4) of the secondary battery cell (1) that has passed through the pouch coupling module (200); an impregnation module 400 that impregnates the separator of the electrode/separator assembly 2 with the electrolyte solution injected from the liquid injection module 300; It includes a sealing module 500 that seals the pouch 4 of the secondary battery cell 1 that has passed through the impregnation module 400.

The lead tab coupling module 100 and the pouch coupling module 200 are sequentially coupled and can be coupled as a pair to one liquid injection module 300, and the liquid injection module ( Of course, 300) can be formed as a pair.

Here, in the electrode/separator assembly 2 according to the present invention, as shown in Figures 1 and 2, first electrode sheets 13 and second electrode sheets 14 are stacked alternately, and the first electrode sheets A separator 15 is positioned between (13) and the second electrode sheet 14 and includes a plurality of electrode tabs 11 and 12 extending from the electrode sheets 13 and 14 and protruding to the outside.

The first electrode sheet 13 and the second electrode sheet 14 are electrodes that are alternately stacked and separated by a separator 15, forming the anode and cathode of the secondary battery cell 1, respectively. As a member, it may be formed of a metal sheet depending on the electrode characteristics.

The separator 15 is a member interposed between the first electrode sheet 13 and the second electrode sheet 14, and is preferably made of a material having high electrolyte wettability and high chemical resistance.

The separator 15 may have various materials depending on the materials of the first electrode sheet 13 and the second electrode sheet 14, the physical properties of the electrolyte, etc.

The electrode tabs 11 and 12 can have various configurations extending from the first electrode sheet 13 and the second electrode sheet 14.

Specifically, the electrode tab 11 may protrude from one side of the battery assembly 10, or may protrude from both sides of the battery assembly 10.

The lead tab coupling module 100 includes a loading area (A1) where the electrode/separator assembly (2) is loaded from the first transfer line (L1) through which the electrode/separator assembly (2) is sequentially supplied, and a pair of A cutting area (A3) for cutting a pair of electrode tabs (11, 12) of the electrode/separator assembly (2) using the electrode tab cutting device (120) including the cutting member (121), and the electrode/separator assembly. A first welding area (A4) for welding the lead tabs (31, 32) to any one of the pair of electrode tabs (11, 12) of (2), and the pair of electrode tabs of the electrode/separator assembly (2) A second welding area (A5) for welding the lead tabs (31, 32) to the remaining one of (11, 12), and a lead tab to each of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2). The unloading area (A0), which discharges the electrode/separator assembly (2) welded at (31, 32) to the second transfer line (L2) for delivering it to the pouch combination module (200), is set sequentially along the circumferential direction. It includes a turntable 110 that supports the electrode/separator assembly 2 and sequentially positions it from the loading area A1 to the unloading area A0.

The loading area A1 includes an electrode/separator assembly loading device that loads the electrode/separator assembly 2 into the lead tab coupling module 100, and can be configured in various ways.

In particular, the electrode/separator assembly loading device can be configured in a variety of configurations in which the electrode/separator assembly 2 is loaded into the lead tab coupling module 100 and aligned at the same time.

Specifically, the electrode/separator assembly loading device is a transfer unit including a head portion 940 that fixes the electrode/separator assembly 2 in order to transfer the electrode/separator assembly 2 to the lead tab coupling module 100. (910) and; a fixing part 920 including an upper plate 921 and a lower plate 922 for fixing the electrode/separator assembly 2 to the lead tab coupling module 100; It includes an alignment unit 930 for aligning the electrode/separator assembly 2.

The head part 940 includes a chuck member 941b that fixes the opening and closing unit 941 including a pair of opening and closing members 941a and the electrode/separator assembly 2 and transfers it to the lead tab coupling module 100. Various configurations are possible with the configuration included.

In addition, the head portion 940 includes a configuration that is driven perpendicularly to the ground so that the electrode/separator assembly 2 is positioned between the upper plate 921 and the lower plate 922 of the fixing portion 920. can do.

Specifically, the opening and closing part 941 may include a pair of opening and closing members 941a that are parallel to the ground and operate perpendicular to the longitudinal direction of the electrode/separator assembly 2, and the chuck member 941b is It may be coupled to the lower part of the opening and closing member 941a to fix the electrode/separator assembly 2.

The opening/closing portion 941 is parallel to the ground at the top of the electrode/separator assembly 2 and operates perpendicular to the longitudinal direction of the electrode/separator assembly 2 while maintaining a gap so as to be able to pick up the electrode/separator assembly 2. Various configurations are possible by adjusting the configuration.

In addition, the opening and closing member 941a is configured in a U-shape, as shown in FIGS. 5A and 5B, and both ends are bent toward the electrode/separator assembly 2, allowing for various configurations.

Specifically, the electrode/separator assembly 2 is positioned between both ends of the opening and closing member 941a and the chuck member 941b coupled to the lower part of the opening and closing member 941a to fix the electrode/separator assembly 2. Various configurations are possible with this structure.

The chuck member 941b is connected as a pair to a pair of opening and closing members 941a along the longitudinal direction of the electrode/separator assembly 2, so various configurations are possible.

Additionally, the chuck member 941b can be driven up and down to fix the electrode/separator assembly 2 together with the opening and closing member 941b.

The transfer unit 910 may transfer the electrode/separator assembly 2 in a stepwise manner so that it can be positioned between the upper plate 921 and the lower plate 922 of the fixing unit 920.

Specifically, the transfer unit 910 is initially lowered before being transferred to the fixing unit 920, and then the electrode/separator assembly 2 is placed between the upper plate 921 and the lower plate 922 of the fixing unit 920. After being transported to be inserted, it can be lowered again secondarily.

In addition, the transfer unit 910 includes a guide rail 911 that guides the electrode/separator assembly 2 to be loaded from the first transfer line L1 through which the electrode/separator assembly 2 is sequentially supplied. Various configurations are possible.

The guide rail 911 may be connected from the first transfer line (L1) to the loading area (A1) of the lead tab combination module 100, and does not interfere with the transfer of the electrode/separator assembly (2). It is desirable to install it so that this does not occur.

Specifically, the guide rail 911 may not be perpendicular to the first transfer line (L1), but the electrode/separator assembly 2 fixed by the head part 940 of the transfer unit 910 has a length It is desirable to transfer from the first transfer line (L1) to the loading area (A1) while maintaining the direction perpendicular to the first transfer line (L1).

In addition, when the guide rail 911 is not perpendicular to the first transfer line (L1), the components of the head portion 940 must maintain a parallel or vertical relationship with the electrode/separator assembly 2. It goes without saying that the configuration of the portion 940 and the configuration of the guide lane 911 may be somewhat misaligned.

The fixing part 920 has various configurations for fixing the electrode/separator assembly 2, including the upper plate 921 and the lower plate 922, to the turntable 110 of the lead tab coupling module 100. possible.

Specifically, the fixing part 920 can have various configurations in which a support 923 extending from the upper plate 921 is hinged to the lower plate 922.

In particular, the support 923 is preferably extended toward the center of the turntable 110 of the lead tab coupling module 100, and is coupled to the turntable 110 so that the electrode/separator assembly 2 can be sequentially transferred. Various configurations are possible.

In addition, the support 923 may be hinged to the upper plate 921 at the top of the upper plate 921 so that the upper plate 921 can press and secure the electrode/separator assembly 2. .

Additionally, the lower plate 922 may be configured to fix the electrode/separator assembly 2 from moving through a structure such as a suction pad.

The aligning unit 930 includes aligning members 931, 932, 933, 934, and 935 that exist perpendicularly to the edge of the electrode/separator assembly 2 and perform alignment, and can be configured in various ways. do.

Specifically, one of the alignment members 931 is located between the electrode tabs 11 and 12 of the electrode/separator assembly 2 and aligns them so as not to interfere with the electrode/separator assembly 2. Configuration is possible.

In addition, except for the alignment member 931 located between the electrode tabs 11 and 12, the remaining alignment members (932, 933, 934, 935) are located at the remaining edge of the electrode/separator assembly (2) and are aligned. Various configurations are possible.

Specifically, alignment members 932 and 933 are placed at the edges of the electrode/separator assembly 2 opposite the electrode tabs 11 and 12, excluding the central portion, to prevent interference with the fixing portion 920. You can.

In addition, the alignment members 931, 932, 933, 934, and 935 are configured to align the electrode/separator assembly 2 while moving parallel to the plate surface of the electrode/separator assembly 2, so various configurations are possible. .

In particular, the alignment members 931, 932, 933, 934, and 935 can be moved using the pneumatic cylinder 936, and the electrode/separator assembly 2 moves from the edge of the electrode/separator assembly 2 toward the center. ) can be aligned.

In addition, the aligner 930 has various configurations, including an aligner driving unit 937 that moves the aligner 930 up and down at the lower part of the aligners 931, 932, 933, 934, and 935. possible.

The aligner driving unit 937 is configured to align the electrode/separator assembly 2 by transporting it by the transfer unit 910 and positioned between the upper plate 921 and the lower plate 932 of the fixing unit 920. After the electrode/separator assembly 2 is rotated and transferred by the turntable 110, various configurations are possible by driving it up and down so that there is no interference with the transfer.

The method of loading the electrode/separator assembly 2 into the lead tab combination module 100 involves fixing the electrode/separator assembly 2 in order to transfer the electrode/separator assembly 2 to the lead tab combination module 100. descending the head portion 940 from the upper part of the first transfer line (L1) toward the electrode/separator assembly (2); The head unit 940 fixes the electrode/separator assembly 2 and transfers it to the first position P1 of the loading area A1; lowering the head portion 940 to a certain height and then transferring it back to the second position (P2); Various configurations are possible, including the step of aligning the electrode/separator assembly 2 by seating it on the aligner 930.

Specifically, when the electrode/separator assembly 2 is transferred to the second position P2, it is fixed by the fixing part 920, the chucking of the chuck member 941b is released, and the opening and closing member 941a is connected to the electrode/separator assembly 2. By moving perpendicular to the longitudinal direction of the separator assembly 2, the fixation of the electrode/separator assembly 2 by the head portion 940 is released.

Afterwards, the aligner 930 is raised by the aligner drive unit 937 to support the electrode/separator assembly 2, and the fixation by the fixer 920 is released, and the aligner 931, 932 , 933, 934, 935), the alignment of the electrode/separator assembly 2 is performed.

After that, the electrode/separator assembly 2 is again fixed by the fixing part 920, and the aligning part 930 is lowered so that the electrode/separator assembly 2 is transferred to the next configuration by the turntable 110. Make sure there is no interference.

Specifically, the first position (P1) is farther from the center of the turntable 110 compared to the second position (P2), and the second position (P2) is located at the upper plate 921 of the fixing part 920. It is preferable that it is between and the lower plate 922.

The cutting area (A3) is for cutting a pair of electrode tabs 11 and 12 of the electrode/separator assembly 2 using an electrode tab cutting device 120 including a pair of cutting members 121. Various configurations are possible.

Specifically, a pair of cutting members 121 for cutting the electrode tabs 11 and 12 of the electrode/separator assembly 2; It includes a driving unit 122 for driving the cutting member 121 up and down.

The cutting member 121 is composed of a pair and corresponds to the cathode portion 11 and the anode portion 12 of the electrode tabs 11 and 12, and simultaneously includes the cathode portion 11 and the anode portion 12 of the electrode tabs 11 and 12. Various configurations are possible by cutting the anode portion 12 individually.

Specifically, the cutting member 121 forms a certain angle with respect to the plate surface of the electrode/separator assembly 2, and is configured to cut the cathode portion 11 of the electrode tabs 11 and 12 and the electrode tab 11. , The configuration for cutting the anode part 12 of 12) can be formed separately.

In addition, the pair of cutting members 121 are preferably made of different metals depending on the constituent materials of the cathode portion 11 and the anode portion 12 of the electrode tabs 11 and 12.

The driving unit 122 is configured to drive the cutting member 121 up and down to cut the electrode tabs 11 and 12, and can have various configurations.

Specifically, the driving unit 122 may be configured to cut the electrode tabs 11 and 12 by vertically moving a pair of cutting members 121, and is configured to convert rotational movement by a motor, etc. into linear drive. Various configurations are possible, and it may be a configuration in which the cutting member 121 is directly vertically moved using a pneumatic cylinder, etc.

In addition, various configurations are possible by including a cutting guide portion 123 that allows the electrode tabs 11 and 12 of the electrode/separator assembly 2 to be fixed and cut by the cutting member 121.

Specifically, the cutting guide unit 123 allows the electrode tabs 11 and 12 of the electrode/separator assembly 2 to be transferred to the upper part of the cutting guide unit 123 to adjust the electrode tabs 11 and 12 to a certain size. Various configurations are possible with a configuration that allows for cutting.

Additionally, the cutting guide unit 123 may include a configuration for collecting unnecessary parts of the cut electrode tabs 11 and 12.

The first welding area (A4) and the second welding area (A5) are for welding the lead tabs (31, 32) to any one of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2). Various configurations are possible with a configuration that includes a welding device.

Since the constituent materials of the first electrode sheet 13 and the second electrode sheet 14 of the electrode/separator assembly 2 are different, this is for welding in different environments depending on the composition of the electrode sheets.

The unloading area (A0) combines the electrode/separator assembly (2) with the lead tabs (31, 32) welded to each of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2) with the pouch. Various configurations are possible, including a configuration that discharges to the second transfer line (L2) for delivery to the module 200.

Specifically, the electrode/separator assembly 2 may be discharged by rotating at a certain angle so that it is discharged along the longitudinal direction of the second transfer line L2.

The turntable 110 can be configured in various configurations to sequentially position the electrode/separator assembly 2 from the loading area A1 to the unloading area A0 while supporting it.

Specifically, the turntable 110 can sequentially position up to 12 areas, and can be configured in various configurations by adding or deleting necessary areas depending on options.

In addition, a fixing part 920 is coupled to the turntable 110, and the fixing part 920 moves the electrode tabs 11 and 12 of the electrode/separator assembly 2 in the outer circumferential direction of the turntable 110. The electrode/separator assembly 2 may be fixed to face and perform each process while the turntable 110 rotates.

The lead tab coupling module 100 further includes a tack welding area A2 for primarily welding the pair of electrode tabs 11 and 12 in order to fix the pair of electrode tabs 11 and 12. can do.

The tack welding area (A2) can have various configurations including a device for welding the electrode tabs (11, 12) to facilitate cutting before cutting the electrode tabs (11, 12), and can be configured as a pair. It is desirable to include a pair of welding devices so that the electrode tabs 11 and 12 can be welded respectively.

The lead tab coupling module 100 may further include a cleaning area A6 for removing foreign substances caused by welding after welding the pair of electrode tabs 11 and 12.

The cleaning area A6 may include at least one of a vacuum dust collection unit 161 that removes foreign substances using a vacuum and an air blow unit 162 that removes foreign substances by spraying gas.

The lead tab coupling module 100 has an electrode tab pressing area (A7) that presses the welded area of a pair of electrode tabs 11 or a protective tape attachment area (A8) that attaches a protective tape to protect the welded area. It may further include.

The electrode tab pressing area A7 can be configured in various ways by including a device for strengthening the connection of the electrode tabs by pressing the welded portion of the electrode tabs 11 and 12.

The protective tape attachment area (A8) is configured to prevent defects such as separation of the electrode sheets (13, 14) and the separator (15) of the electrode/separator assembly (2) in an unattached state, and has various configurations. possible.

The secondary battery manufacturing system further includes a pouch forming module 600 that forms the pouch 4 before the electrode/separator assembly 2 and the pouch 4 are assembled in the pouch assembly module 200. can do.

The pouch forming module 600 includes a pouch loading unit 610 that loads pouches 4 of a certain size; a pouch forming unit 620 that shapes the pouch 4 so that the pouch 4 loaded by the pouch loading unit 610 can accommodate the electrode/separator assembly 2; Various configurations are possible as it includes a pouch cutting unit 630 that cuts the molded pouch 4.

The pouch loading unit 610 is configured to load the supplied pouches 4, which are composed of pouch rolls, into the pouch forming unit 620 while cutting them to a certain size. Various configurations are possible.

The pouch molding unit 620 is configured to mold the pouch 4 so that the pouch 4 loaded by the pouch loading unit 610 can accommodate the electrode/separator assembly 2. Various configurations are possible. .

Specifically, the pouch forming part 620 includes a baseline forming part 650 including a baseline forming member 651; Various configurations are possible with a configuration including a pouch pressing portion 660 that presses against the reference line C to form a pair of receiving portions 661 and 662.

The reference line forming portion 650 is configured to eliminate the need for separate alignment when the electrode/separator assembly 2 is stored in the pouch 4, and is positioned perpendicular to the longitudinal direction of the pouch 4. Various configurations are possible, including a baseline forming member 651 to form a baseline (C) crossing the center.

The reference line forming member 651 can be configured in various ways, such as pressurizing the pouch 4 so that it is not completely cut, or cutting only a portion of the cross section of the pouch 4.

This configuration does not require separate alignment, unlike when storing the electrode/separator assembly 2 using a pair of existing separate pouches, and allows the pair of storage parts to be accurately corresponded and contacted. It has the advantage of allowing the electrode/separator assembly (2) to be easily stored in the pouch (4).

The pouch pressing part 660 can be configured in a variety of configurations by pressing to form a pair of receiving parts 661 and 662.

It is preferable that the pair of storage portions 661 and 662 have approximately the same height, but of course, they may be different from each other as needed.

The pouch cutting unit 630 folds the pouch 4 so that the pair of storage parts 661 and 662 are in contact with the reference line C of the pouch 4 and then cuts the edge of the pouch 4. Various configurations are possible.

Specifically, after the pouch (4) is folded, the remaining edges except for the reference line (C) are cut and organized to seal and inject liquid after the electrode/separator assembly (2) is stored without the need for separate alignment. In the process, interference caused by the pouch (4) can be minimized.

The pouch forming module 600 can be configured in various ways by further including a pouch inspection unit 640 that inspects the pouch 4 for defects.

Specifically, the pouch inspection unit 640 can be configured to inspect defects by irradiating light to the pouch 4 and then obtaining an image that is reflected, and can be configured in various ways.

The secondary battery manufacturing system may further include an inspection module 700 for inspecting defects in the secondary battery cell 1.

The inspection module 700 can be configured in various ways by further including a weight inspection device 710 that measures the weight of the secondary battery cell 30 to determine whether the electrolyte evaporates by vacuum.

In addition, the inspection module 700 can be configured in various configurations to simultaneously perform various inspections using a turntable device.

The secondary battery manufacturing system includes electrode tabs 11 and 12 of the secondary battery cell 1 so that the history of the secondary battery cell 1 can be tracked. ), a variety of configurations are possible by further including a laser marking device for engraving with a laser.

In the laser marking device, characteristics such as the date of manufacture or physical properties of the electrode tabs 11 and 12 may be engraved, and may be imprinted in the form of a barcode or QR code.

The secondary battery manufacturing system may further include an insulation resistance measuring device 800 that measures insulation by pressurizing the secondary battery cell 1 before pouring liquid into the secondary battery cell 1.

Specifically, the insulation resistance measuring device 800 can be configured in a variety of configurations, including a cell pressurizing portion 810 and a plurality of connection terminal portions 820.

In addition, various configurations are possible by further including a secondary battery cell rotation transfer device 840 that rotates and transfers the secondary battery cell 1.

The cell pressurizing unit 810 is located in parallel and opposite to each other with the secondary battery cell 1 in between, and includes an upper press member 811 and a lower press member 812 that press the secondary battery cell 1. Various configurations are possible with a configuration including.

Specifically, the upper pressing member 811 located in the upper part of the secondary battery cell rotation transfer device 840 and the lower pressing member located in the lower part of the secondary battery cell 1 corresponding to the secondary battery cell 1 ( 812) may be included.

In particular, it may include a pressure driving unit 830 that moves at least one of the upper pressure member 811 and the lower pressure member 812 perpendicular to the plate surface of the secondary battery cell 1.

In addition, in the configuration in which the secondary battery cell (1) is rotated by the secondary battery cell rotation transfer device 840 and insulation resistance measurement is performed only in a portion of the secondary battery cell rotation transfer device 840, the secondary battery cell rotation transfer device The pressure driving unit 830 may exist independently so that the rotation of 840 and the driving of the pressure driving unit 830 do not interfere with each other.

Specifically, a pressure driving unit 830 is present at the lower part of the portion where the upper pressure member 811 is located to raise the lower pressure member 812, which can be moved separately from the secondary battery cell rotation transfer device 840, to press the secondary battery cell. The battery cell 1 may be pressurized.

In addition, a lower pressing member 812 is located below the secondary battery cell 1, and the secondary battery cell rotation transfer device 840 supports the lower pressing member 812 to press the secondary battery cell 1 and the lower pressing member 812. The members 812 may be rotated together.

In addition, the upper and lower pressing members 811 and 812 may be composed of plates, and are preferably of a size large enough to press the entire plate surface of the secondary battery cell 1.

The pressure drive unit 830 can have various configurations including a hydraulic cylinder 831, and moves at least one of the upper and lower pressure members 811 and 812 to be closer to the secondary battery cell 1. Various configurations are possible.

Specifically, the pressure driving unit 830 may include a pressure driving member 832 protruding from the upper portion, and the pressure driving member 832 may have a protrusion 812a formed by protruding from the lower end of the lower pressure member 812. ) may be configured so that the lower pressing member 812 connected to the protrusion 812a rises.

In particular, since the protrusion 812a and the pressure driving member 832 are formed separately, the pressure driving part 830 moves up and down independently of the secondary battery cell rotation transfer device 840 and moves the lower pressure member 812. The secondary battery cell (1) can be pressurized through.

The plurality of connection terminals 820 can be electrically connected to the secondary battery cell 1 in order to measure the insulation resistance of the secondary battery cell 1, and can have various configurations.

Specifically, the plurality of connection terminals 820 include at least one lead tab connection terminal portion 821 electrically connected to the lead tabs 31 and 32 or at least one pouch electrically connected to the pouch 4. It may include a connection terminal portion 822.

The lead tab connection terminal portion 821 can be connected to the lead tabs 31 and 32 by moving up and down on the top of the lead tabs 31 and 32.

In addition, the pouch connection terminal portion 822 is electrically connected to the pouch 4 while driving perpendicular to the lead tabs 31 and 32 in the direction in which the lead tabs 31 and 32 of the secondary battery cell 1 are coupled. It can be.

Specifically, when the electrode/separator assembly 2 is stored in the pouch 4 and then sealed, the lead tabs 31 and 32 are formed to protrude, and the secondary battery cell at the portion where the lead tabs 31 and 32 protrude is formed. To measure the insulation of the seal of (1), the pouch connection terminal portion 822 is connected vertically to the secondary battery cell 1 in the pouch 4 at the portion where the lead tabs 31 and 32 protrude. You can.

When the plurality of connection terminals 820 are connected to the secondary battery cell 1, insulation is measured by applying a voltage to measure resistance. For example, a voltage of 25V can be applied, and the resistance thereof is measured. It is possible to determine whether current flows in the secondary battery cell 1 by measuring .

In addition, by pressurizing the secondary battery cell 1 to check whether it is insulated, the separator 15 and the electrode sheets 13 and 14 are all in close contact to check whether the insulation is in good condition, so that the function of the separator 15 is normal. It can be a standard for judging whether

The secondary battery cell manufacturing method according to the present invention is a method of manufacturing a pouch-type secondary battery cell (1), comprising the steps of combining lead tabs using a lead tab coupling module (100); A pouch combining step of forming a secondary battery cell (1) in which the electrode/separator assembly (2) is inserted into the inside of the pouch (4); An injection step of injecting electrolyte into the pouch (4) of the secondary battery cell (1) that has undergone the pouch combining step; An impregnation step of impregnating the separator of the electrode/separator assembly (2) with the electrolyte solution injected in the liquid injection step; It includes a sealing step of sealing the pouch (4) of the secondary battery cell (1) that has undergone the impregnation step.

Since the above is only a description of some of the preferred embodiments that can be implemented by the present invention, as is well known, the scope of the present invention should not be construed as limited to the above embodiments, and the scope of the present invention described above Both the technical idea and the technical idea underlying it will be said to be included in the scope of the present invention.

1: Secondary battery cell 100: Lead tab combination module
200: Pouch combination module 300: Liquid injection module
400: Impregnation module 500: Sealing module
600: Pouch forming module 800: Insulation measuring device

Claims (5)

The first electrode sheet 14 and the second electrode sheet 13 are stacked alternately with a separator 15 interposed thereto, and the electrode/separator assembly 2 includes a pair of electrode tabs 11 and 12. As an electrode tab cutting device,
a pair of cutting members 121 that simultaneously cut a pair of electrode tabs 11 and 12 of the electrode/separator assembly 2;
It includes a driving unit 122 for simultaneously driving the pair of cutting members 121 up and down,
The cutting member 121 forms a certain angle with respect to the plate surface of the electrode/separator assembly 2,
It includes a guide portion 123 that allows the electrode tabs 11 and 12 of the electrode/separator assembly 2 to be fixed and cut by the cutting member 121,
A loading area (A1) where the electrode/separator assembly (2) is loaded from the first transfer line (L1) through which the electrode/separator assembly (2) is sequentially supplied, and the electrode tab cutting device (120) is used to A cutting area (A3) for cutting a pair of electrode tabs (11, 12) of the electrode/separator assembly (2), and one of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2). A first welding area (A4) for welding the lead tabs (31, 32), and a lead tab (31, 32) on the remaining one of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2). A second welding area (A5) for welding, and the electrode/separator assembly (2) in which lead tabs (31, 32) are welded to each of the pair of electrode tabs (11, 12) of the electrode/separator assembly (2). ) is sequentially set along the circumferential direction, supporting the electrode/separator assembly (2). In the lead tab coupling module 100 including a turntable 110 sequentially positioned from the loading area (A1) to the unloading area (A0),
The electrode tab cutting device 120 is installed in the cutting area A3,
The turntable 110 is coupled with a fixing part 920 that fixes the electrode tabs 11 and 12 of the electrode/separator assembly 2 toward the outer circumference of the turntable 110,
The electrode/separator assembly 2 is fixed to the fixing part 920 by rotation of the turntable 110 and is positioned between the pair of cutting members 121 and the guide part 123. An electrode tab cutting device, characterized in that the electrode tabs (11, 12) of the electrode/separator assembly (2) are cut by moving a pair of cutting members (121). delete delete In claim 1,
The cutting member 121 is composed of a pair and corresponds to the cathode part 11 and the anode part 12 of the electrode tabs 11 and 12, and simultaneously forms the cathode part 11 of the electrode tabs 11 and 12. ) and the anode part 12, respectively. An electrode tab cutting device characterized in that cutting. In claim 4,
An electrode tab cutting device, characterized in that the pair of cutting members 121 are each made of different metals.

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