KR20200066901A - Manufacturing equipment and manufacturing method of electrode assembly - Google Patents

Abstract

The present invention relates to an electrode assembly manufacturing apparatus to perform a lamination process in consideration of a thickness difference in input materials and an electrode assembly manufacturing method thereof. According to the present invention, the electrode assembly manufacturing apparatus comprises: a thickness measurement unit measuring a thickness of one or more from an electrode and a separation film; and a lamination unit pressing the electrode and the separation film, which are laminated while passing through the thickness measurement unit, while passing the electrode and the separation film between a pair of vertically arranged pressing roll units to bond the electrode and the separation film. The lamination unit bonds the electrode and the separation film while adjusting at least one from the position, interval, and pressing force of the pair of pressing roll units in accordance with the thickness of one or more from the electrode and the separation film measured through the thickness measurement unit.

Description

Electrode assembly manufacturing apparatus and electrode assembly manufacturing method {MANUFACTURING EQUIPMENT AND MANUFACTURING METHOD OF ELECTRODE ASSEMBLY}

The present invention relates to an electrode assembly manufacturing apparatus and an electrode assembly manufacturing method.

Unlike a primary battery, a secondary battery is rechargeable, and has been researched and developed in recent years due to its small size and high capacity. As technology development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing.

Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries according to the shape of the battery case. In a secondary battery, an electrode assembly mounted inside a battery case is a power plant capable of charging and discharging consisting of a stacked structure of electrodes and separators.

The electrode assembly is a jelly-roll type wound by interposing a separator between a positive electrode and a negative electrode of a sheet-like sheet coated with an active material, and a stack type in which a plurality of positive and negative electrodes are sequentially stacked with a separator interposed. , And the stack-type unit cells can be roughly classified into a stack-and-fold type wound with a long separation film.

Korean Patent Publication No. 10-2014-0015647

One aspect of the present invention is to provide an electrode assembly manufacturing apparatus and an electrode assembly manufacturing method capable of performing a lamination process by reflecting a difference in thickness of an input material in a lamination process in which electrodes and separators are passed and bonded.

Electrode assembly manufacturing apparatus according to an embodiment of the present invention, a pair of electrodes, or a separator measuring the thickness of any one or more of the thickness and the electrode and the separator stacked through the thickness measurement unit are disposed up and down It includes a lamination unit for passing through the pressing roll portion of the pressure and bonding the electrode and the separation membrane, the lamination portion according to the thickness of any one or more of the electrode or the separation membrane measured through the thickness measuring unit, the pair of pressing rolls The position of the portion, the gap between the pair of press roll portions, and at least one or more of the pressing force of the pair of press roll portions may be adjusted to bond between the electrode and the separator.

On the other hand, the electrode assembly manufacturing method according to an embodiment of the present invention, a thickness measurement process for measuring any one or more thickness of an electrode or a separator and the electrode and the separator to be stacked between a pair of press rolls disposed up and down And a lamination process of bonding the electrode and the separator by passing through and pressing, wherein the lamination process comprises a pair of pressurizing roll parts according to at least one thickness of the electrode or the separator measured through the thickness measurement process. Position, the distance between the pair of press rolls, and at least one or more of the pressing force of the pair of press rolls may be adjusted to bond between the electrode and the separator.

According to the present invention, prior to input of the lamination process for bonding through the electrode and the separator, the difference in thickness of the input material is sensed, and the lamination process is performed to reflect this, thereby reducing the adhesion non-uniformity, minimizing deformation, and unnecessary process. (Corona process) may not be performed.

In particular, the thickness difference of the input material is automatically sensed and transmitted from multiple pressure rolls to individual pressure rolls in real time, and then the position, spacing, and pressing force of each pressure roll are fed back in real time to automatically control the lamination. As the process is performed, the coating tolerance of the material can be reduced more precisely, so that the adhesive force becomes remarkably uniform, and it is possible to prevent or minimize the deformation of the separation membrane by alleviating the existing excessive pressure to overcome the coating tolerance. have.

1 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to an embodiment of the present invention.
Figure 2 is a side view showing an electrode assembly manufacturing apparatus according to an embodiment of the present invention by way of example.
3 is a front view showing a lamination unit in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.
4 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to another embodiment of the present invention.
5 is a front view showing a thickness measuring unit in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.
6 is a front view showing a lamination unit in an electrode assembly manufacturing apparatus according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments that are associated with the accompanying drawings. It should be noted that in this specification, when adding reference numerals to the components of each drawing, the same components have the same number as possible even though they are displayed on different drawings. In addition, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in describing the present invention, detailed descriptions of related well-known technologies that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to an embodiment of the present invention, Figure 2 is a side view showing an electrode assembly manufacturing apparatus according to an embodiment of the present invention by way of example, Figure 3 is the present invention It is a front view showing a lamination part in the electrode assembly manufacturing apparatus according to an embodiment of the present invention.

1 and 2, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention includes a thickness measuring unit 110 and a thickness for measuring any one or more thicknesses of an electrode 13 or a separator 14 The electrode assembly 10 is manufactured by including a lamination unit 140 that passes through the measurement unit 110 and is stacked by passing the stacked electrodes 13 and the separation membrane 14 between the pair of pressure roll units 120 and 130 and presses them together. can do. In addition, the electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention passes through the thickness measurement unit 110 and the thickness measurement unit 110, the stacked electrode 13 and the laminated body 14 of the separator 14 (S) ), a heating unit 170 for applying heat, and a control unit 150 for adjusting the position, spacing, and pressing force between the pair of press roll units 120 and 130.

Referring to FIG. 3, the electrode assembly 10 is a power generator capable of charging and discharging, and the electrode 11 and the separator 14 may be alternately stacked and formed in an aggregated form. Here, the electrode 13 may be composed of an anode 12 and a cathode 11.

The electrode assembly 10 may be formed by alternately stacking the anode 12, the separator 14, and the cathode 11.

The positive electrode 12 may include a positive electrode current collector 12a and a positive electrode active material 12b applied to the positive electrode current collector 12a. The positive electrode current collector 12a may be made of, for example, aluminum foil, and the positive electrode active material 12b may be, for example, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron phosphate, or the like. It may be made of a compound and a mixture containing one or more.

The negative electrode 11 may include a negative electrode current collector 11a and a negative electrode active material 11b applied to the negative electrode current collector 11a. The negative electrode current collector 11a may be made of, for example, a foil made of copper (Cu) or nickel (Ni). The negative electrode active material 11b may be made of, for example, artificial graphite, lithium metal, lithium alloy, carbon, petroleum coke, activated carbon, graphite, silicon compounds, tin compounds, titanium compounds, or alloys thereof. In this case, the negative electrode active material may be made of, for example, non-graphite-based SiO (silica, silica) or SiC (silicon carbide).

The separator 14 may be made of an insulating material and a ductile material. At this time, the separator 14 may be formed of, for example, a polyolefin-based resin film such as polyethylene or polypropylene having microporous properties.

1 and 2, the thickness measurement unit 110 may measure any one or more thicknesses of the electrode 13 or the separation membrane 14.

The thickness measurement unit 110 may be made of a contact-type thickness measurement gauge. Here, the contact-type thickness gauge may be, for example, a dial gauge or an ultrasonic thickness gauge. (At this time, the dial gauge may be measured through, for example, Mistoyo's dial thickness gauge 7321 product. However, the present invention is not necessarily limited thereto.)

Here, the thickness measuring unit 110 is the thickness of the first thickness meter 111 for measuring the thickness of the cathode 11, the second thickness meter 112 for measuring the thickness of the separator 14, and the thickness of the anode 12 It may include a third thickness meter 113 for measuring. That is, in the thickness measuring unit 110, the first thickness meter 111, the second thickness meter 112, and the third thickness meter 113 may be formed of, for example, a contact thickness gauge.

The heating unit 170 may pass through the thickness measurement unit 110 and the thickness measurement unit 110 and apply heat to the stacked body S of the stacked electrode 13 and the separation membrane 14.

In addition, the heating unit 170 may include an upper heating unit 171 positioned on the upper side of the stack S and a lower heating unit 172 positioned on the lower side of the stack S. At this time, the upper heating unit 171 and the lower heating unit 172 are heated by a heater (not shown), respectively, and a stack (S) passing between the upper heating unit 171 and the lower heating unit 172 ) Can be heated by transferring heat.

Meanwhile, the heating unit 170 may be electrically connected to the control unit 150 to be controlled by the control unit 150.

Referring to FIGS. 1 to 3, the lamination part 140 is stacked while passing through the thickness measurement part 110, passing through the heating part 170, and heating the electrode 13 and the separation film 14. The electrode 13 and the separator 14 may be bonded by passing pressure between a pair of press roll parts 120 and 130 disposed above and below.

In addition, the lamination unit 140 is the position of the pair of pressure roll units 120 and 130 according to any one or more thicknesses of the electrode 13 or the separation membrane 14 measured through the thickness measurement unit 110, and the pair of pressure roll units The electrode assembly 10 may be manufactured by bonding at least one of the gaps between the 120 and 130 and the pressing force of the pair of pressure rolls 120 and 130 and bonding between the electrode 13 and the separation membrane 14. At this time, the electrode assembly 10 may be, for example, a form in which a stack S of the electrode 13 and the separator 14 is cut to a predetermined size through the cutter 30. In addition, as another example, the electrode assembly 10 may have a form in which a plurality of unit cells cut into a predetermined size through a cutter 30 are stacked in a plurality between separators.

Then, the lamination unit 140 further includes a control unit 150, and the thickness measurement value measured by the thickness measurement unit 110 in the control unit 150 is compared with the thickness standard value stored in the memory 160, and Position, spacing, and pressing force between the pair of press rolls 120 and 130 may be adjusted.

The pair of pressing roll parts 120 and 130 are composed of an upper pressing roll part 120 positioned in the upper direction and a lower pressing roll part 130 positioned in the lower direction in the stacked body S of the electrode 13 and the separator 14. Can be.

Here, the upper pressure roll part 120 may include an upper pressure roll 121 and an upper moving part 122 for moving the upper pressure roll 121. In addition, the lower pressure roll portion 130 may include a lower pressure roll 131 and a lower moving portion 132 for moving the lower pressure roll 131.

The upper pressure roll 121 and the lower pressure roll 131 are each made of a cylindrical roll, and the electrode 13 and the separation membrane 14 passing between the upper pressure roll 121 and the lower pressure roll 131 are formed. Both sides of can be pressed.

The upper moving part 122 and the lower moving part 132 may be, for example, an actuator to move the upper pressure roll 121 and the lower pressure roll 131 toward or away from each other.

Here, the upper moving portion 122 and the lower moving portion 132 may include, for example, a cylinder 132b and a moving table 132a moved from the cylinder 132b. At this time, the moving table 132a rotatably supports the upper pressure roll 121 and the lower pressure roll 131, and may move the upper pressure roll 121 and the lower pressure roll 131.

And, the actuator may be made of any one of, for example, pneumatic, hydraulic, electric, or pneumatic actuators.

The electrode assembly manufacturing apparatus 100 according to an embodiment of the present invention configured as described above is passed through the electrode 13 and the separation membrane 14 and is put into the lamination unit 140 for bonding, and the thickness measurement unit 110 Depending on the thickness of any one or more of the measured electrode 13 or the separation membrane 14, the position of the pair of press rolls 120 and 130, the distance between the pair of press rolls 120 and 130, and the pair of press rolls 120 and 130 ) At least one or more of the pressing force of the control unit 150 may be controlled and the electrode 13 and the separator 14 may be laminated. Therefore, as the lamination is reflected by reflecting the tolerance of the electrode 13 or the separation membrane 14, it is possible to alleviate the non-uniformity of adhesion, and it is possible to minimize the deformation of the separation membrane 14 because it is not necessary to apply excessive pressure to overcome the tolerance. .

Figure 4 is a block diagram showing the concept of an electrode assembly manufacturing apparatus according to another embodiment of the present invention, Figure 5 is a front view showing a thickness measuring unit in the electrode assembly manufacturing apparatus according to another embodiment of the present invention, Figure 6 is the present It is a front view showing a lamination part in the electrode assembly manufacturing apparatus according to another embodiment of the present invention.

Hereinafter, an electrode assembly manufacturing apparatus according to another embodiment of the present invention will be described.

4 to 6, the electrode assembly manufacturing apparatus according to another embodiment of the present invention includes a thickness measuring unit 210 and a thickness measuring unit 210 for measuring the thickness of any one or more of the electrodes 13 or the separator 14 210, the electrode 13 and the separator 14, which are stacked, are passed through a pair of pressure roll parts 220, 230 including a plurality of pressure rolls 221a, 221b, 221c, 231a, 231b, 231c. An electrode assembly may be manufactured by including a lamination part 240 to be joined. In addition, the electrode assembly manufacturing apparatus according to another embodiment of the present invention passes through the thickness measurement unit 210 and the thickness measurement unit 210 and is stacked on the stacked electrode (S) of the stacked electrode (13) and the separation membrane (14). It may further include a control unit 250 for adjusting the position, spacing, and the pressing force between the heating unit 270 and a pair of pressure roll units 220 and 230.

Electrode assembly manufacturing apparatus 200 according to another embodiment of the present invention, compared with the electrode assembly manufacturing apparatus according to the above-described embodiment, a plurality of places in the electrode 13 or the separator 14 in the thickness measuring unit 210 Measure the thickness of the, there is a difference that the pair of press rolls (220,230) is composed of a plurality of press rolls (221a,221b,221c,231a,231b,231c), respectively.

Therefore, in this embodiment, contents overlapping with one embodiment are briefly described, and the differences are mainly described.

In more detail, in the electrode assembly manufacturing apparatus according to another embodiment of the present invention, the thickness measurement unit 210 may measure any one or more thicknesses of the electrode 13 or the separation membrane 14.

The thickness measurement unit 210 may be made of a contact-type thickness measurement gauge. Here, the contact-type thickness measuring gauge may be, for example, a dial gauge or an ultrasonic thickness measuring instrument. Accordingly, the thickness measurement unit 210 can accurately measure the thickness in micro units.

Here, the thickness measurement unit 210 may be made of a thickness measurement gauge including a plurality of measurement rods 212a, 2212b, 212c whose ends are in contact with the measurement portion, for example. At this time, the plurality of measuring rods 212a, 212b, and 212c may measure the thickness of a plurality of places in the width direction W in any one or more of the electrode 13 and the separator 14. Here, the plurality of measuring rods 212a, 212b, and 212c may be vertically supported on the support 211. At this time, the width direction may be, for example, the Y-axis direction shown in FIG. 5.

The heating part 270 may pass heat through the thickness measurement part 110 and the thickness measurement part 110 and apply heat to the stacked body S of the stacked electrode 13 and the separation film 14.

In addition, the heating unit 270 may be heated by a heater to transfer heat to the stack (S) of the electrode 13 and the separator 14.

Meanwhile, the heating unit 270 may be electrically connected to the control unit 250 and controlled by the control unit 250.

The lamination unit 240 is stacked while passing through the thickness measuring unit 210, passing through the heating unit 270, and the heated electrode 13 and the separation membrane 14, a pair of pressure rolls arranged up and down ( 220,230) and applying pressure to bond the electrode 13 and the separator 14.

In addition, the lamination unit 240 is positioned at a position of a pair of pressure roll units 220 and 230 according to any one or more thicknesses of the electrode 13 or the separator 14 measured through the thickness measurement unit 210, and a pair of pressures The gap between the roll portions 220 and 230 and at least one or more of the pressing force of the pair of pressurizing roll portions 220 and 230 may be adjusted to bond between the electrode 13 and the separation membrane 14.

In this case, the control unit 250 compares the thickness measurement value measured through the thickness measurement unit 210 and the thickness standard value stored in the memory in real time, and the position, spacing, or pressing force of the pair of pressure roll units 220 and 230 Can be adjusted.

The pair of press roll parts 220 and 230 each include a plurality of press rolls 221a, 221b, 221c, 231a, 231b, 231c, and the control unit 250 includes a plurality of press rolls 221a, 221b, 221c, 231a, 231b ,231c) may be individually adjusted for each press roll 221a,221b,221c,231a,231b,231c.

Further, the plurality of pressing rolls 221a, 221b, 221c, 231a, 231b, 231c of the pair of pressing rolls 220, 230 may be arranged along the width direction W. At this time, the control unit 250 is a plurality of pressure rolls (221a, 221b, 221c, 231a, 231b, 231c) according to the thickness of the electrode 13 or the separation membrane 14 in a number of places measured by the thickness measuring unit 210 Position, spacing, or pressing force can be individually adjusted.

On the other hand, the pair of pressure roll units 220 and 230 are the upper pressure roll unit 220 positioned in the upper direction in the stacked body S of the electrode 13 and the separation membrane 14 and the lower pressure roll unit 230 positioned in the lower direction. It can be composed of.

The upper pressurizing roll part 220 includes a plurality of upper pressurizing rolls 221a, 221b, 221c and a plurality of upper pressurizing rolls 222a, 222b, 222c for moving the upper pressurizing rolls 221a, 221b, 221c, respectively. can do. In addition, the lower press roll portion 230 is a plurality of lower press rolls (231a, 231b, 231c) and a plurality of lower press rolls (231a, 231b, 231c) to move each of a plurality of lower moving parts (232a, 232b, 232c) It may include.

The plurality of upper press rolls 221a, 221b, 221c and the plurality of lower press rolls 231a, 231b, 231c are each made of a cylindrical roll, and the plurality of upper press rolls 221a, 221b, 221c and a plurality of lower press rolls Both sides of the electrode 13 and the separator 14 passing between the (231a, 231b, 231c) can be pressed individually.

The plurality of upper moving parts (222a, 222b, 222c) and the plurality of lower moving parts (232a, 232b, 232c) are, for example, an actuator (actuator) is made of a plurality of upper pressure rolls (221a, 221b, 221c) and a plurality of lower The pressure rolls 231a, 231b, and 231c may be moved toward or away from each other.

And, the actuator may be made of any one of, for example, pneumatic, hydraulic, electric, or pneumatic actuators.

The electrode assembly manufacturing apparatus 200 according to another embodiment of the present invention configured as described above measures the thickness of a plurality of places of the electrode 13 or the separator 14 in the thickness measurement unit 210, and the electrode 13 or The lamination part for pressing and bonding the separation membrane 14 includes a plurality of press rolls 221a, 221b, 221c, 231a, 231b, 231c, respectively. Accordingly, a plurality of press rolls 221a, 221b, and 221c are fed back by real-time feedback (Feed back) from the control unit 250 according to the thickness of a plurality of places of the electrode 13 or the separator 14 measured by the thickness measurement unit 210. ,231a,231b,231c) can be individually controlled and adjusted automatically. Therefore, as the lamination is performed by accurately reflecting the tolerances of the electrode 13 or the separation film 14, it is possible to significantly alleviate the adhesion non-uniformity. In addition, since it is not necessary to apply excessive pressure to overcome the tolerance, deformation of the separator can be significantly minimized. In addition, processes such as corona processes are unnecessary, which simplifies the process and lowers manufacturing time and manufacturing cost.

Hereinafter, a method of manufacturing an electrode assembly according to an embodiment of the present invention will be described.

1 and 2, a method of manufacturing an electrode assembly according to an embodiment of the present invention includes a thickness measuring process and an electrode 13 and a separator ( 14) The electrode assembly 10 may be fabricated by laminating the electrodes 13 and the separation membrane 14 by laminating them by passing them through a pair of pressure roll parts 120 and 130 which are stacked by stacking them. have. In addition, the electrode assembly manufacturing method according to an embodiment of the present invention through a heating process, and a lamination process to heat the laminated body (S) of the stacked electrode 13 and the separator 14 through a thickness measurement process An inspection process for determining the presence or absence of defects in the bonded electrode 13 and the separation membrane 14 may be further included.

An electrode assembly manufacturing method according to an embodiment of the present invention is a method of manufacturing an electrode assembly through the electrode assembly manufacturing apparatus according to the above-described embodiment. Therefore, in this embodiment, contents overlapping with the above-described embodiment will be briefly described, and the differences will be mainly described.

More specifically, referring to FIGS. 1 to 3, in the electrode assembly manufacturing method according to an embodiment of the present invention, the thickness measurement process may measure any one or more thicknesses of the electrode 13 or the separation membrane 14.

In addition, the thickness measurement process may measure any one or more thicknesses of the electrode 13 or the separator 14 through a thickness measurement unit 110 made of, for example, a contact-type thickness measurement gauge.

In the heating process, heat may be applied to the stacked body S of the electrode 13 and the separator 14 that have been passed through the thickness measurement process.

In addition, the heating process is performed through the electrode 170 through the heating unit 170 including the upper heating unit 171 positioned on the upper side of the laminate S and the lower heating unit 172 positioned on the lower side of the laminate S. 13) and the laminate (S) of the separator 14 can be heated.

In the lamination process, the electrodes 13 and the separators 14 may be stacked to pass between a pair of press rolls 120 and 130 disposed above and below, and the electrodes 13 and the separators 14 may be bonded by pressing.

In addition, the lamination process, depending on the thickness of any one or more of the electrode 13 or the separation membrane 14 measured through the thickness measurement process, the position of the pair of press rolls 120 and 130, between the pair of press rolls 120 and 130 The gap, and at least one or more of the pressing force of the pair of press rolls 120 and 130 may be adjusted to bond between the electrode 13 and the separator 14.

The lamination process compares the thickness measurement value measured through the thickness measurement process with the thickness standard value stored in the memory 160 in the controller 150, and when the thickness measurement value is smaller than the thickness standard value, the pair of pressure roll parts 120 and 130 To move the gap closer to each other, and if the pressure is lowered by the pair of pressing rolls (120 130), the thickness measurement value is larger than the thickness standard value, the distance between the pair of pressing rolls (120 130) is moved away, It is possible to increase the pressing force pressed by the pair of pressing roll parts 120 and 130.

On the other hand, the pair of pressure rolls 120 and 130 are the upper pressure roll portion 120 positioned in the upper direction in the stacked body S of the electrode 13 and the separator 14 and the lower pressure roll portion 130 positioned in the lower direction. It can be composed of. Here, the upper pressure roll part 120 may include an upper pressure roll 121 and an upper moving part 122 for moving the upper pressure roll 121. In addition, the lower pressure roll portion 130 may include a lower pressure roll 131 and a lower moving portion 132 for moving the lower pressure roll 131.

And, in the lamination process, the upper pressure roll 121 and the lower pressure roll 131 are each made of a cylindrical roll, and the electrode 13 and the separation membrane 14 passing between the upper pressure roll 121 and the lower pressure roll 131 are formed. ) Can be pressed on both sides. Then, the upper moving portion 122 and the lower moving portion 132, for example, an actuator (actuator) can be made to move the upper pressure roll 121 and the lower pressure roll 131 in a direction closer to each other or away from each other.

At this time, the lamination process moves the upper pressure roll 121 and the lower pressure roll 131 in the upper and lower directions through the upper moving portion 122 and the lower moving portion 132 in the control unit 150, and the upper pressing roll ( 121) and the lower pressure roll 131, the position, spacing, and the pressing force can be adjusted.

On the other hand, referring to Figures 2 and 3, the electrode 13 and the separator 14 through the thickness measuring process, the traveling direction G proceeding to the lamination process through the heating process is, for example, the X-axis direction, the electrode 13 and the width direction W of the separation membrane 14 are in the Y-axis direction, and the thickness directions of the electrodes 13 and the separation membrane 14 may be in the Z-axis direction.

Hereinafter, a method of manufacturing an electrode assembly according to another embodiment of the present invention will be described.

4 to 6, the electrode assembly manufacturing method according to another embodiment of the present invention includes a thickness measurement process and an electrode 13 and a separator ( 14) The electrode assembly may be manufactured by including a lamination process of laminating and bonding the electrode 13 and the separation membrane 14 by passing through a pair of pressing roll parts 220 and 230 which are stacked by stacking them, and being placed up and down. In addition, the electrode assembly manufacturing method according to an embodiment of the present invention through a heating process, and a lamination process to heat the laminated body (S) of the stacked electrode 13 and the separator 14 through a thickness measurement process An inspection process for determining the presence or absence of defects in the bonded electrode 13 and the separation membrane 14 may be further included.

The electrode assembly manufacturing method according to another embodiment of the present invention measures the thickness of a plurality of places of the electrode 13 or the separator 14 in the thickness measurement process, as compared with the electrode assembly manufacturing method according to the above-described embodiment, In the lamination process, the electrode 13 and the separation membrane 14 are formed by a plurality of pressure rolls 220 and 230, and a plurality of pressure rolls 221a, 221b, 221c, 231a, 231b, 231c, respectively. Therefore, in this embodiment, contents overlapping with one embodiment are briefly described, and the differences are mainly described.

In more detail, in the electrode assembly manufacturing method according to another embodiment of the present invention, the thickness measurement process may measure any one or more thicknesses of the electrode 13 or the separator 14. At this time, the thickness measurement process can measure the thickness of a plurality of places in the width direction (W) perpendicular to the traveling direction (G) of the electrode 13 and the separation membrane (14). Here, the traveling direction G may be, for example, the X-axis direction, the width direction W may be the Y-axis direction, and the thickness direction may be the Z-axis direction (see FIG. 2 ).

In addition, the thickness measurement process may measure any one or more thicknesses of the electrode 13 or the separator 14 through a thickness measurement unit 210 made of, for example, a contact-type thickness measurement gauge.

Here, the thickness measurement process may be made of, for example, a thickness measurement gauge including a plurality of measurement rods 212a, 212b, 212c whose ends are in contact with the measurement portion. At this time, the plurality of measuring rods 212a, 212b, and 212c can measure the thickness of the plurality of places in the width direction W in any one or more of the electrode 13 and the separator 14.

In the heating process, heat may be applied to the stacked body S of the electrode 13 and the separator 14 that have been passed through the thickness measurement process.

In addition, the heating process may heat the stacked body S of the electrode 13 and the separator 14 through the heating unit 170 heated by the heater.

In the lamination process, the electrodes 13 and the separators 14 are stacked to pass between a pair of press roll parts 220 and 230 disposed above and below, and the electrodes 13 and the separators 14 can be bonded by pressing.

In addition, the lamination process is based on any one or more thicknesses of the electrode 13 or the separation membrane 14 measured through the thickness measurement process, between the positions of the pair of press roll parts 220 and 230, and between the pair of press roll parts 220 and 230. The gap, and at least one or more of the pressing force of the pair of pressing roll units 220 and 230 may be adjusted to bond between the electrode 13 and the separation membrane 14.

At this time, the lamination process compares the thickness measurement value measured through the thickness measurement process in the control unit 250 with the thickness standard value stored in the memory in real time, and the position, spacing, or pressing force of the pair of pressure roll units 220 and 230 Can be adjusted.

Meanwhile, in the lamination process, the pair of press rolls 220 and 230 each include a plurality of press rolls 221a, 221b, 221c, 231a, 231b, 231c, and a plurality of press rolls 221a, 221b, 221c, 231a, 231b ,231c) may be individually adjusted for each press roll 221a, 221b, 221c, 231a, 231b, 231c by the control unit 250.

Further, in the lamination process, a plurality of pressure rolls 221a, 221b, 221c, 231a, 231b, 231c of the pair of pressure roll units 220 and 230 may be arranged along the width direction W. At this time, the lamination process is the location, spacing, or a plurality of pressure rolls (221a, 221b, 221c, 231a, 231b, 231c) according to the thickness of the electrode 13 or the separation membrane 14 in a number of places measured in the thickness measurement process, or The pressing force can be individually adjusted by the control unit 250.

On the other hand, the pair of pressure roll units 220 and 230 are the upper pressure roll unit 220 positioned in the upper direction in the stacked body S of the electrode 13 and the separation membrane 14 and the lower pressure roll unit 230 positioned in the lower direction. It can be composed of. Here, the upper pressure roll unit 220 is a plurality of upper pressure rolls (221a, 221b, 221c) and a plurality of upper pressure rolls (221a, 221b, 221c) to move the plurality of upper moving parts (222a, 222b, 222c) It may include. In addition, the lower press roll portion 230 is a plurality of lower press rolls (231a, 231b, 231c) and a plurality of lower press rolls (231a, 231b, 231c) to move each of a plurality of lower moving parts (232a, 232b, 232c) It may include.

At this time, the lamination process may include a plurality of upper press rolls 221a, 221b, 221c and a plurality of upper moving parts 222a, 222b, 222c and a plurality of lower moving parts 232a, 232b, 232c. The position between the plurality of upper pressure rolls 221a, 221b, 221c and the plurality of lower pressure rolls 231a, 231b, 231c while individually moving the lower pressure rolls 231a, 231b, 231c in the upper and lower directions. , Spacing, and pressing force can be individually adjusted.

The present invention has been described in detail through specific examples, but this is for specifically describing the present invention, and the electrode assembly manufacturing apparatus and electrode assembly manufacturing method according to the present invention are not limited thereto. It will be said that various implementations are possible by those skilled in the art within the technical spirit of the present invention.

In addition, the specific protection scope of the invention will be clarified by the appended claims.

10: electrode assembly
11: Cathode
11a: cathode current collector
11b: negative electrode active material
12: anode
12a: anode current collector
12b: positive electrode active material
13: electrode
14: separator
30: cutter
100,200: electrode assembly manufacturing apparatus
110,210: thickness measurement unit
120,220: upper pressure roll part
121: upper pressure roll
122: upper moving part
122a: Mobile table
122b: Sealer
130, 230: lower pressure roll portion
131: lower pressure roll
132: lower moving part
132a: Mobile table
132b: cylinder
140,240: lamination
150,250: control unit
160,260: memory
170,270: heating part
171: upper heating part
172: lower heating part
211: support
S: laminate

Claims (14)

A thickness measuring unit for measuring any one or more thickness of the electrode or separator; And
And a lamination unit for passing the electrode stacked while passing through the thickness measurement unit and the separation membrane through a pair of pressure roll units disposed above and below and bonding the electrode and the separation membrane by pressing.
The lamination portion according to the thickness of any one or more of the electrode or the separation membrane measured through the thickness measuring portion, the position of the pair of press roll portions, the gap between the pair of press roll portions, and the pair of press roll portions Electrode assembly manufacturing apparatus for controlling at least one or more of the pressing force and bonding between the electrode and the separator. The method according to claim 1,
An electrode assembly manufacturing apparatus further comprising a heating unit that applies heat before pressing the stacked layers of the electrode and the separator passing through the thickness measurement unit. The method according to claim 2,
The lamination unit further includes a control unit,
The control unit compares the thickness measurement value measured through the thickness measurement unit and the thickness standard value stored in the memory, and adjusts the position, spacing, or pressing force of the pair of pressure roll units. The method according to claim 3,
Each of the pair of press rolls includes a plurality of press rolls,
The control unit is an electrode assembly manufacturing apparatus for individually adjusting the position, spacing, or pressing force of the plurality of pressure rolls for each pressure roll. The method according to claim 4,
The thickness measuring unit measures the thickness of a plurality of places in the width direction perpendicular to the traveling direction of the electrode and the separator,
A plurality of pressure rolls of the pair of pressure rolls are arranged along the width direction,
The control unit is an electrode assembly manufacturing apparatus for individually adjusting the position, spacing, or pressing force of the plurality of pressure rolls according to the thickness of the electrode or the separation membrane in a plurality of locations measured by the thickness measurement unit. The method according to claim 5,
The thickness measurement unit
An electrode assembly manufacturing apparatus comprising a contact-type thickness measuring gauge including a plurality of measuring rods whose ends are in contact with a measuring portion. The method according to claim 6,
The plurality of measuring rods
Electrode assembly manufacturing apparatus for measuring the thickness of a plurality of places in the width direction from any one or more of the electrode and the separator. A thickness measurement process for measuring any one or more thicknesses of electrodes or separators; And
The lamination process of laminating the electrode and the separator to pass through between a pair of press roll parts disposed above and below and pressing to bond the electrode and the separator,
The lamination process may include a position of the pair of press roll parts, a gap between the pair of press roll parts, and the pair of pressurizations according to at least one thickness of the electrode or the separator measured through the thickness measurement process. A method of manufacturing an electrode assembly for controlling at least one or more of the pressing force of a roll part and bonding the electrode and the separator. The method according to claim 8,
The electrode assembly manufacturing method further comprises a heating step of applying heat to the stack of the electrode and the separator laminated through the thickness measurement process. The method according to claim 9,
The lamination process
A method of manufacturing an electrode assembly for comparing a thickness measurement value measured through the thickness measurement process and a thickness standard value stored in the memory by a control unit to adjust the position, spacing, or pressing force between the pair of pressure roll units. The method according to claim 10,
The lamination process
The control unit compares the thickness measurement value measured through the thickness measurement process with the thickness standard value stored in the memory,
If the thickness measurement value is smaller than the thickness standard value, the gap between the pair of press roll portions is moved closer, and if it is smaller, the pressing force pressed by the pair of press roll portions is lowered.
When the thickness measurement value is larger than the thickness standard value, the gap between the pair of press roll portions moves away, and the electrode assembly manufacturing method increases the pressing force of the pair of press roll portions. The method according to claim 10,
In the lamination process,
Each of the pair of press rolls includes a plurality of press rolls,
A method of manufacturing an electrode assembly in which the control unit individually adjusts the position, spacing, or pressing force between the plurality of pressure rolls for each pressure roll. The method according to claim 12,
The thickness measurement process measures the thickness of a plurality of places in the width direction perpendicular to the traveling direction of the electrode and the separator,
In the lamination process, the plurality of pressure rolls are arranged along the width direction, and the position, spacing, or pressing force between the plurality of pressure rolls according to the thickness of the electrode or the separator in a plurality of places measured in the thickness measurement process. Electrode assembly manufacturing method for individually adjusting the control unit. The method according to claim 9,
After going through the lamination process,
The electrode assembly manufacturing method further comprises an inspection process for determining whether a defect is present by measuring the total thickness of the electrode and the separator bonded through the lamination process.

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