KR101264742B1 - Apparatus for forming electrode plate - Google Patents

Abstract

In the present invention, an electrode plate forming apparatus is disclosed. The electrode plate forming apparatus may include an active material applying part forming a plurality of active material areas along a longitudinal direction of the electrode base material by coating an active material on an electrode base material continuously transferred, and a density measuring part measuring an active material density of the active material area. And a position calculating unit for calculating the position coordinates of the active material region to be measured via the density measuring unit, density measurement data output from the density measuring unit, and position coordinates of the active material region output from the position calculating unit. An integrated control unit for storing.
According to the present invention, by detecting the density measurement data of the active material and the position coordinates of the measurement object together and storing them in association with each other, to provide an electrode plate forming apparatus that can easily determine the presence or absence of a defect and the position of the defect.

Description

Apparatus for forming electrode plate

The present invention relates to an electrode plate forming apparatus, and relates to an apparatus for forming an electrode plate to be applied to a secondary battery.

Due to its advantages, secondary batteries have been applied to various technical fields throughout the industry, and are widely used as energy sources of mobile electronic devices such as digital camels, cellular phones, and notebook computers. It is also attracting attention as an energy source for hybrid electric vehicles, which is proposed as a solution for air pollution of gasoline and diesel internal combustion engines.

Such a secondary battery includes an electrode plate formed by coating an electrode active material on a metal substrate, and drying and press molding. The secondary battery monitors the coating state of the electrode active material visually, and removes a repair for a defect and a part determined to be defective. It has been done by hand.

One embodiment of the present invention is to provide an electrode plate forming apparatus which can easily detect the presence or absence of a defect and a location of a defect by detecting the density measurement data of the active material and the position coordinates of the measurement object together and storing them in association.

The electrode plate forming apparatus of the present invention for solving the above problems and other problems,

An active material coating part applying an active material on the electrode base material continuously transferred to form a plurality of active material areas along the length direction of the electrode base material;

A density measuring unit for measuring an active material density in the active material region;

A position calculator for calculating a position coordinate of the active material region which is a measurement target via the density measurer; And

And an integrated control unit for storing the density measurement data output from the density measuring unit and the position coordinates of the active material region output from the position calculating unit.

For example, the position coordinate of the said active material area shows the position of the said active material area | region along the longitudinal direction from the front-end | tip of the said electrode base material.

For example, the position calculator includes an encoder connected to a drive motor for continuously supplying an electrode base material to the position calculator,

The position coordinates of the active material region are calculated from the number of pulses output from the encoder from the tip of the electrode base material until the active material region passes through the density measuring unit.

For example, the position coordinates of the active material region indicate the order of the active material regions numbered in order according to the arrangement order for the plurality of active material regions arranged from the tip of the electrode base material.

For example, the position calculator includes a detection sensor for recognizing the boundary of the active material region formed discontinuously on the electrode base material,

The position coordinates of the active material region are calculated from the number of pulses of the sensing sensor output corresponding to the active material region.

For example, the electrode plate forming apparatus further includes a drying unit disposed between the active material applying unit and the density measuring unit along the transfer path of the electrode base material and performing a drying treatment of the active material region.

For example, the integrated control unit controls the active material application unit so that the density measurement data is input, and feedback control is performed so that the density of the active material follows the target value.

For example, the active material applying unit includes a die coater for discharging the active material in the form of a slurry onto the electrode base material,

The integrated control unit controls at least one of a discharge pressure of the die coater, a tilting angle of the die coater, and a gap size between the die coater and an application surface of the electrode base material.

For example, the position calculation unit,

Recognizing the boundary of the active material region formed discontinuously on the electrode base material, comprising a plurality of sensing sensors arranged along the width direction of the electrode base material,

The curved defect in which the boundary of the active material region is curved is detected according to the pulse signals output from the detection sensors.

On the other hand, the electrode plate forming apparatus according to another embodiment of the present invention,

A first active material coating part which forms an active material region on the first surface by applying an active material on the first surface of the electrode base material continuously transferred; And

And a second active material coating part for coating an active material on a second surface of the electrode base material to form a plurality of active material regions on the second surface.

A first density measuring unit disposed between the first and second active material applying units and measuring an active material density of the active material region of the first surface; And

A first position calculator configured to calculate position coordinates of the active material region to be measured via the first density measurer; And

And an integrated control unit for storing the density measurement data of the first surface output from the first density measuring unit and the position coordinates of the active material region output from the first position calculating unit.

For example, the integrated control unit controls the first active material applying unit so that the density measurement data of the first surface is input, and feedback control is performed so that the density of the active material follows the target value.

For example, the integrated control unit receives the density measurement data of the first surface and controls the second active material applying unit to compensate for the density of the active material of the first surface.

For example, the electrode plate forming apparatus may include: a first drying unit disposed between the first active material applying unit and the first density measuring unit along a transfer path of the electrode base material, and performing a drying treatment of an active material region; It includes more.

For example, the electrode plate forming apparatus,

A second density measuring unit which measures the active material density of the active material region of the second surface downstream of the second active material applying unit; And

And a second position calculator configured to calculate position coordinates of the active material region which is a measurement target via the second density measurer.

For example, the integrated control unit stores the density measurement data of the second surface output from the second density measuring unit and the position coordinates of the active material region output from the second position calculating unit.

For example, the integrated control unit controls the second active material applying unit so that the density measurement data of the second surface is input, and feedback control is performed so that the density of the active material follows the target value.

For example, the electrode plate forming apparatus may include a second drying unit disposed between the second active material applying unit and the second density measuring unit along a transfer path of the electrode base material, and performing a drying treatment of an active material region; It includes more.

For example, the second position calculator,

A first sensing sensor disposed toward the first surface of the electrode base material and sensing a boundary of an active material region on the first surface; And

And a second sensing sensor disposed toward the second surface of the electrode base material and sensing a boundary of an active material region on the second surface.

According to the output signals of the first and second detection sensors, a step defect in which boundaries of the active material regions of the first and second surfaces form a step with each other is detected.

According to one embodiment of the present invention, by storing the density measurement data of the active material in association with the position coordinates of the measurement object, reflecting the measurement data of the first surface in the coating step of the second surface at the time of coating the both sides of the active material, The low active material density of one side can be compensated at the time of application of the second side. In addition, by identifying the location of the defect of the density defect, the corresponding location of the defect is tracked so that the operator can recognize the location of the defect, remove and repair.

In addition, since the density measurement proceeds after the drying treatment of the active material, the density of the active material can be measured with high precision. In addition, by performing feedback control with input of the measurement data of the active material, the density of the active material can follow the target value.

According to one embodiment of the present invention, the defect of curvature in which the boundary profile of the active material is curved, the step defect in which the active material boundaries of the first and second surfaces of the electrode base material form a step are automatically captured, and the position of the defect area By calculating the coordinates and tracking the position coordinates, the operator can recognize the location of the defect and make repairs and the like possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the whole structure of the electrode plate forming apparatus which concerns on one Embodiment of this invention.
2 is a view showing a pattern of an active material region formed on an electrode base material.
3 is a view showing in detail the active material applying portion of FIG.
4 is a diagram illustrating the density measuring unit and the position calculating unit of FIG. 1 in more detail.
FIG. 5 is a view for explaining capturing of a curved defect through the position calculator of FIG. 1.
6 is a view showing the overall configuration of an electrode plate forming apparatus according to another embodiment of the present invention.
7 is a view illustrating in detail the first density measuring unit and the first position calculating unit of FIG. 6.
FIG. 8 is a diagram for explaining capture of a step difference defect by the second position calculation unit in FIG. 6.

Hereinafter, an electrode plate forming apparatus according to preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The rechargeable battery capable of charging and discharging may be formed by enclosing an electrode assembly in an outer container such as a metal can or sealing the flexible outer member. In this case, the electrode assembly may be formed by winding a laminate having a separator interposed between the positive electrode plate and the negative electrode plate in a roll type or stacking the positive electrode plate and the negative electrode plate in turn with a separator interposed therebetween.

Electrode plates, such as a positive electrode plate and a negative electrode plate, may be formed by applying an active material slurry in the form of a liquid or slurry on the electrode base material is transferred in a continuous flow.

1 is a view schematically showing the overall configuration of an electrode plate forming apparatus according to an embodiment of the present invention. 2 is a view showing a pattern of an active material region formed on an electrode base material.

The electrode plate forming apparatus includes an uncoiler (UC) on which a roll on which the electrode base material 10 is wound is mounted, and an electrode base material 10 withdrawn from the uncoiler UC and completed processing, in a roll form. A pair of winding recoilers (RC) are used at both ends, and the electrode base material (10) continuously supplied between the uncoiler (UC) and the recoiler (RC) is accommodated, and upper and lower surfaces 10a of the electrode base material (10). The active material region 15 to which the active material is applied is formed on at least one surface of, 10b). For example, as illustrated in FIG. 2, the electrode plate forming apparatus may form a plurality of active material regions 15 that are discontinuously arranged at a constant pitch along the length direction of the electrode base material 10. The base material region 10 from which the active material is excluded may be formed between the adjacent active material regions 15.

The electrode base material 10 continuously supplied in the form of a strip along the transfer path is coated with the active material slurry while passing through the active material applying unit 110 placed on the transfer path. Then, the electrode base material 10 coated with the active material slurry is passed through the drying unit 120 to remove the volatile solvent component of the slurry, and after drying, the electrode base material 10 may be passed through the press molding unit 150 to increase the bulk density of the active material. Can be.

More specifically, the electrode plate forming apparatus shown in FIG. 1 includes an active material application part 110 for applying an active material slurry on the first surface 10a of the electrode base material 10 that is continuously conveyed, and in the transport direction. A drying unit 120 disposed downstream of the coating unit 110 to dry the active material slurry, and a density measuring unit 130 arranged downstream of the drying unit 120 in a conveying direction to measure the density of the active material; And a position calculating unit 140 disposed adjacent to the density measuring unit 130 to detect positional information of the active material region which is the measurement target via the current density measuring unit 130.

The electrode plate forming apparatus may be disposed downstream of the density measuring unit 130 and the position calculating unit 140, and may include a press molding unit 150 for press molding an active material. 110, a drying unit 120, a density measuring unit 130, and a position calculating unit 140 may include a transfer means R for transferring the electrode base material 10 on a transfer path.

3 is a view illustrating the active material applying unit 110 in more detail. Referring to the drawings, the active material applying unit 110 may include a die coater (111) to apply the active material in the form of a solution or slurry over a wide width (W) of the electrode base material (10). . The die coater 111 discharges the active material slurry through a slot formed in the die head, and applies the active material slurry onto the electrode base material 10 that is continuously transferred. For example, the die coater 111 may be formed to extend in the width W direction of the electrode base material 10 to apply the active material slurry over the entire width W of the electrode base material 10.

The die coater 111 may be set to various postures and angles in a three-dimensional space, it is possible to control the application state of the active material by adjusting the gap size (g) spaced from the application surface of the electrode base material (10). For example, the gap size g may be increased to decrease the density of the active material, or the gap size g may be reduced to increase the density of the active material.

In addition, the die coater 111 is different from the application surface of the electrode base material 10 to the left and right sides along the width W direction in order to eliminate the uneven coating state in the width W direction of the electrode base material 10. The tilting angle θ may be set to be inclined along the width W direction to form the gap size g.

Although not shown in the drawing, the active material applying unit 110 may include pressurizing means (not shown) for controlling the supply flow rate of the active material slurry by forcing the active material slurry in the discharge direction, for example, pressurizing means. The fluid pump as having an impeller controlled at a variable rotational speed and can control the feed flow rate by compressing the sucked active material slurry to produce a variable pressure difference.

In one embodiment of the present invention, the measurement data output from the density measuring unit 130 is returned to the active material applying unit 110 to control the application state of the current active material. For example, the active material applying unit 110 may be controlled so that the density measurement data is input and the feedback control such as PID (Proportional Integrated Derivative) is performed to follow the target value. At this time, as the process variable to be controlled, the gap size g between the die coater 111 and the electrode base material 10, the tilting angle θ of the die coater 111, and the rotational speed of the pressing means (not shown) Can be selected.

For example, if it is determined that the measured density value of the active material is less than the target value, the rotational speed of the pressing means (not shown) may be increased to increase the discharge pressure and the supply flow rate of the active material, and the measured density of the active material may be If it is determined that the deviation in the width (W) direction of the base material 10, by adjusting the tilting angle (θ) of the die coater 111, the die coater 111 along the width (W) direction of the electrode base material (10). Can be tilted.

The active material applying unit 110 is intermittently applied in accordance with the application pattern of the active material that is applied discontinuously with a predetermined pitch in the longitudinal direction of the electrode base material 10 to be continuously supplied. Operation can be interrupted and discharging from the die coater 111 can be stopped.

Referring to FIG. 1, the active material applying unit 110 may include a controller 115 for controlling the overall coating operation, and the controller 115 controls the coating operation according to the instruction of the integrated controller 180. can do. For example, the controller 115 may cooperate with the integrated control unit 180 to control the rotational speed of the pressurizing means (not shown), thereby controlling the application flow rate of the active material slurry and allowing the density of the active material to follow the target value. have.

The drying unit 120 may receive the electrode base material 10 coated with the active material slurry to perform a drying process for removing the volatile solvent contained in the active material slurry. More specifically, the drying unit 120 includes a drying furnace for blocking the periphery of the electrode base material 10 except for the entrance and exit of the electrode base material 10, the inside of the drying furnace for providing a high temperature hot air to the electrode base material It may include a blower 121 for supplying hot air and an exhaust duct 122 for collecting and discharging hot air. However, the drying unit 120 may be implemented in various operation methods in addition to the hot air drying method, for example, a drying method by irradiation of an infrared lamp using a plurality of infrared lamps (not shown) arranged on a transport path. It may be implemented as.

A density measuring unit 130 is disposed downstream of the drying unit 120 along the transfer direction of the electrode base material 10. The density measuring unit 130 measures the density of the active material region 15 formed on the electrode base material 10. Since the density measuring unit 130 measures the active material density after drying in which the volatile solvent of the active material slurry is removed, the active material density can be measured with high precision.

4 is a perspective view illustrating the density measurement unit 130 in more detail. Referring to the drawings, the density measuring unit 130 is installed above the transfer path of the electrode base material 10, is mounted to be driven in the width direction of the electrode base material 10, in the width direction of the electrode base material 10 The scan operation may include a density meter 131 for measuring the density of the active material.

Although not shown in the drawing, the density measuring unit 130 captures the transmitted light transmitted from the light source (not shown) through the active material region 15, and according to the color pattern or gray scale of the captured image image. Know the density distribution. However, the density measuring unit 130 may be implemented by various other known density measuring methods. The density measuring unit 130 receives the electrode base material 10 continuously transferred to measure the density of the active material region 15. For example, all the active material regions 15 formed on the electrode base material 10 The active material region 15 selected intermittently at regular intervals can be used as the measurement target.

The density measuring unit 130 may include a controller 135 for controlling the measurement operation as a whole. The controller 135 may control the measurement operation according to the instructions of the integrated controller 180. For example, the density measurement data output from the density measuring unit 130 may be transmitted to the integrated control unit 180 and may be stored in a memory of the integrated control unit 180. In this case, the density measurement data may be stored in association with the position coordinates of the active material region 15 that is the measurement target via the density measurement unit 130.

The position calculating unit 140 is disposed adjacent to the density measuring unit 130. The position calculating unit 140 calculates the position coordinates of the active material region 15 that is the measurement target via the current density measuring unit 130. The position calculator 140 may include an encoder 141 for calculating position coordinates along the length direction of the electrode base material 10. The position calculator 140 may further include an operation controller 145 for counting the number of pulses input from the encoder 141 and performing a required operation.

The encoder 141 detects a rotational position of a drive motor (not shown) that is involved in the transfer of the electrode base material 10, and is arranged along the circumference of a rotating plate (not shown) coaxially with the rotation axis of the drive motor. The rotational position (or rotational speed) of the drive motor is calculated by generating a constant pulse signal at every moment of capturing light passing through the plurality of slits. Accordingly, as shown in FIG. 2, when the pulse signal of the encoder 141 is counted, the transfer distance L of the electrode base material 10 (see FIG. 2) in a straight line, that is, the tip of the electrode base material 10 is shown. From 10S (refer FIG. 2), the position coordinate of the active material area | region 15 via the current density measuring part 130 can be calculated.

The position coordinates indicate the position of the active material region 15 via the current density measurement unit 130 along the longitudinal direction of the electrode base material 10, and the pulse counted from the tip 15S of the electrode base material 10 is measured. It can represent the number or the physical distance converted therefrom.

As shown in FIG. 2, as another form of the position coordinate, the position coordinate is a sequence of active material regions numbered in sequence of the active material regions 15 arranged discontinuously from the front end 10S of the electrode base material 10. It may mean (# 1, # 2, # 3, # 4). For example, the number of pulses output from the encoder 141 is counted, and the active material region 15 passing through the current density measuring unit 130 from the number of pulses is turned from the front end 10S of the electrode base material 10. We can calculate how many times. To this end, the operation controller 145 connected to the encoder 141, the length of the active material region 15 (or the number of pulses corresponding to the length), the length of the base material region 10 from which the active material is excluded (or Information regarding the number of pulses corresponding to the length) may be input in advance, and the operation controller 145 may be configured to generate the active material region 15 from the total number of pulses output from the tip 10S of the electrode base material 10. In consideration of the length of and the length of the base material region 10, it is possible to determine the order of the active material region (15).

The operation controller 145 connected to the encoder 141 may transmit the position coordinates of the active material region 15, which is the measurement target via the current density measurement unit 130, to the integrated control unit 180. The controller 180 may store the measured data transmitted from the density measuring unit 130 and the position coordinates of the measurement target transmitted from the operation controller 145 in the memory.

The position calculator 140 may include a detection sensor 142. The detection sensor 142 may calculate the position coordinates of the active material region 15 that is the measurement target via the current density measurement unit 130. Both the sensing sensor 142 and the encoder 141 may calculate the position coordinates of the active material region 15 that is the measurement target via the current density measuring unit 130, and the sensing sensor 142 and the encoder 141. By mutually comparing and comparing the position coordinates outputted from), the error of position detection can be corrected.

More specifically, the detection of the position coordinates by the detection sensor 141 may be performed as follows. That is, the sensing sensor 141 receives the flow of the electrode base material 10 continuously transferred, the active material region 15 coated with the active material along the longitudinal direction of the electrode base material 10, and the base material from which the active material is excluded. By identifying the region 10, the boundary of the active material region 15 can be recognized. The sensor 142 may recognize the boundary of the active material region 15 by scanning an image of the electrode base material 10 continuously transferred and detecting a boundary between the high luminance region and the low luminance region from the image image. For example, the sensing sensor 142 may generate a pulse signal at every instant of capturing the boundary of the active material region 15, and the section from the start of the pulse to the end corresponds to the active material region 15.

The detection sensor 142 starts to recognize the first active material region 15 sequentially conveyed in the order of conveyance along the conveying direction, and then outputs a pulse signal corresponding to each active material region 15. Therefore, the position coordinates of the active material region 15 via the current density detection unit 130 can be grasped by counting the pulse signal from the tip 10S of the electrode base material 10 (see FIG. 2). At this time, the position coordinates of the active material region 15 are arranged in sequence of the active material region 15 discontinuously formed from the distal end 10S of the electrode base material 10 along the longitudinal direction of the electrode base material 10 (# 1, # 2). , # 3, # 4, and FIG. 2). That is, the position coordinates of the active material region 15 are for specifying the position of an active material region 15 along the longitudinal direction of the electrode base material 10, and are arranged from the front end 10S of the electrode base material 10. It may mean a sequence numbered in order according to the order of the active material region 15.

The pulse signal output from the detection sensor 142 may be counted by the calculation controller 145, and the calculation controller 145 connected to the detection sensor 142 may be an active material region passing through the current density measurement unit 130. The position coordinates of 15 may be transmitted to the integrated controller 180. The integrated control unit 180 may store the measured data transmitted from the density measuring unit 130 and the position coordinates of the measurement target transmitted from the operation controller 145 in the memory.

FIG. 5 is a diagram for explaining the capture of curved defects by the sensor 142. Since the detection sensor 142 can identify the boundary of the active material region 15, the boundary of the active material region 15 does not line up in a straight line along the width W direction of the electrode base material 10, and the boundary thereof. The curved defect formed by rounding can be captured. As shown in FIG. 5, the sensing sensor 142 may be arranged in a plurality along the width W direction of the electrode base material 10, and the sensing sensors 142 arranged in rows in the width W direction. Since the group of) detects the boundary of the active material region 15 at different positions in the width (W) direction, it is possible to grasp the profile formed by the boundary of the active material region 15 along the width (W) direction. For example, if the group of sensing sensors 142 arranged along the width W direction of the electrode base material 10 senses the boundary of the active material region 15 at different times with a time difference exceeding an allowable range, It may be determined that the boundary of the region 15 is not aligned in the width W direction and that a curved defect exists.

For example, the operation controller 145 connected to the detection sensor 142 receives the pulse signals output from the group of the detection sensors 142 and adjusts the position coordinates of the active material region 15 in which the curved defect is confirmed. The integrated control unit 180 transmits. The integrated control unit 180 stops the transfer of the electrode base material 10 before entering the press-molding unit 150 by tracking the position coordinates of the active material region 15 in which the defect exists and allows the operator to stop the defect region. By removing, repairing, or outputting a warning message to the operator, the operator can recognize the defective area and remove and repair the defective area.

Referring to FIG. 3, when the density measurement value transmitted from the density measurement unit 130 is less than the allowable range, the integrated control unit 180 may perform feedback control to compensate for this. For example, the integrated control unit 180 may control the active material applying unit 110 by inputting the measured density value and the target value, and performing feedback control such as PID (Proportional Integrated Derivative). For example, the integrated control unit 180 outputs a control signal to the active material applying unit 110, and pressurizing means (ex. Fluid) involved in the discharge pressure or the supply flow rate of the active material slurry so that the density of the active material follows the target value. Rotational speed of the pump) can be controlled. Alternatively, the integrated control unit 180 may have a gap size g between the die coater 111 and the electrode base material 10 for discharging the active material slurry so that the density of the active material follows a target value, or the tilting angle θ of the die coater 111. Etc. can be controlled.

For example, the measurement data output from the density measuring unit 130 is processed into a feedback control signal in the integrated control unit 180, and then transferred to the active material applying unit 110 in real time to affect the density of the active material As a result, the discharge pressure and the like of the active material slurry can be increased or decreased.

The integrated control unit 180 stops the transfer of the electrode base material 10 or enters an operator before tracking the position coordinates of the active material region 15 whose density measurement is less than the allowable range and entering the press forming unit 150. By outputting a warning message, the operator can recognize, remove and repair the defective area.

Referring to FIG. 1, the press-molded part 150 is disposed downstream of the density measuring part and the position calculating part along the conveying direction of the electrode base material 10. The press molding part 150 may include a pair of press rollers 151 and 152 arranged in a vertical direction on a transfer path of the electrode base material 10. The press molding unit 150 may contribute to the purpose of increasing the bulk density of the active material by pressing the active material formed on the electrode base material 10. The active material formed on the electrode base material 10 may be compressed while passing between the pair of press rollers 151 and 152 and the bulk density may be improved.

The conveying means R which is responsible for conveying the electrode base material 10 may include a plurality of conveying rollers arranged on the conveying path of the electrode base material 10, and some of the conveying rollers are driven motors (not shown). May be powered to provide a transfer force to the electrode base material 10.

On the other hand, the electrode base material 10 withdrawn from the uncoil UC and completed a series of processing steps is again wound in a roll by the recoiler RC. The electrode plate forming apparatus shown in FIG. 1 may be operated to apply an active material to the first surface 10a of the upper and lower sides of the electrode base material 10, and the electrode base material of which the active material is applied to the first surface 10a is completed. 10 may be added again to the active material coating process on the second surface 10b. In this case, even when the coating process on the first and second surfaces 10a and 10b proceeds in a process separated in time and space, the density measurement data for the first surface 10a is obtained by the active material for the second surface 10b. For example, during the active material coating process of the second surface 10b, the active material region 15 that falls short of the target value by referring to the density measurement data of the first surface 10a may be used. To compensate, the discharge pressure or the supply flow rate of the active material slurry on the second surface 10b of the active material region 15 may be increased.

As described above, it is possible to control the coating of the active material on the second surface 10b by utilizing the density measurement data on the different first surface 10a. The bonds are possible because they are stored in association with, for example, based on a sequence numbered sequentially along the plurality of active material regions 15 arranged discontinuously from the tip 10S of the electrode base material 10. This is because the position of the active material region 15 can be specified. Accordingly, in the application of the active material on the second surface 10b, the position coordinates of the active material region 15 that fall short of the allowable range are traced from the density measurement data of the first surface 10a, and the second surface of the active material region 15 ( Sufficient excess of the active material slurry can be supplied for 10b). On the other hand, in the application of the active material on the second surface 10b, an electrode plate forming apparatus as shown in FIG. 1 may be applied.

6 is a diagram schematically showing the overall configuration of an electrode plate forming apparatus according to another embodiment of the present invention.

The electrode plate forming apparatus performs a coating operation on the upper and lower surfaces of the electrode base material 10, that is, the first surface 10a and the second surface 10b in one in-line process. .

The electrode plate forming apparatus includes a first active material applying part 210 and a first drying part 220 which apply and dry the active material slurry on the first surface 10a of the electrode base material 10. And a second active material applying part 260 and a second drying part 270 which apply and dry the active material slurry on the second surface 10b of the electrode base material 10.

The first and second active material applying parts 210 and 260 are respectively disposed on the transfer path of the electrode base material 10 to supply the active material slurry on the first and second surfaces 10a and 10b of the electrode base material 10. And a controller 215 or 265 for controlling the overall coating operation of the die coders 211 and 261 and the active material applying parts 210 and 260.

The electrode plate forming apparatus rewinds the uncoiler UC on which the roll on which the electrode base material 10 is wound is mounted, and the electrode base material 10 withdrawn from the uncoiler UC to finish the processing, into a roll form. First and second active material coating parts 210 and 260 on the transfer path of the electrode base material 10 continuously supplied between the uncoiler UC and the recoiler RC with the pair of recoilers RC at both ends. ) Is applied to the first and second surfaces 10a and 10b of the electrode base material 10 in one in-line process.

As can be seen in the drawing, the electrode base material 10, which was transported with the first surface 10a as the working surface, is inverted after the application and drying of the first surface 10a and the second surface 10b is the working surface. The transfer continues. For example, the electrode base material 10 may be changed in the traveling direction through the arrangement of the transfer rollers R and the work surface may be reversed.

Downstream of the first drying unit 220 and the second drying unit 270 along the conveying direction of the electrode base material 10, the first and second surfaces 10a and 10b respectively measure the density of the active material. Second density measuring units 230 and 280 may be disposed. Since the first and second density measuring units 230 and 280 measure the density of the active material that has been dried, the density of the active material can be measured with high precision.

The press molding part 297 may be disposed downstream of the second density measuring part 280 along the transfer direction of the electrode base material 10. Formed on the first and second surfaces 10a and 10b of the electrode base material 10 while passing between the press rollers 298 and 299 disposed toward the first and second surfaces 10a and 10b of the electrode base material 10. The active material may be compressed to improve bulk density of the active material.

FIG. 7 is a view illustrating in detail the first density measuring unit 230 shown in FIG. 6. Referring to the drawing, the first density measuring unit 230 measures the density of the active material region 15 on the first surface 10a. The first density measuring unit 230 is a scan driving in the width direction on the transfer path of the electrode base material 10 and the density measuring instrument 231 for performing a density measurement of the active material region 15, and to control the overall density measurement operation It may include a controller 235 for.

The first position calculating unit 240 is disposed adjacent to the first density measuring unit 230. The first position calculator 240 calculates the position coordinates of the active material region 15 that is the measurement target via the first density measurement unit 230. The first position calculator 240 includes an encoder 241 and a sensor 242 for calculating position coordinates, and counts and positions pulse signals output from the encoder 241 and the sensor 242. It may include a calculation controller 245 for calculating the coordinates.

The density measurement data output from the first density measurement unit 230 and the position coordinates of the measurement target output from the first position calculation unit 240 are transmitted to the integrated control unit 300, and the integrated control unit 300 measures the density. The data and the position coordinates of the measurement object are stored in association with each other.

The integrated control unit 300 stores the density measurement data and the measurement target position coordinates in association with each other, and performs the following control operation on the measurement value that is outside the allowable range.

The first control operation of the integrated control unit 300 returns the density measurement data of the first surface 10a to the first active material applying unit 210 to control the current application state of the active material on the first surface 10a. For example, the integrated control unit 300 controls the first active material applying unit 210 so that the density measurement value and the target value are input, the feedback control is performed, and the density of the active material follows the target value. For example, when it is determined that the density measurement value is lower than the target value, the first active material applying unit 210 may be controlled to increase the discharge pressure or the supply flow rate of the active material slurry supplied onto the electrode base material 10.

In the second control operation of the integrated control unit 300, the density measurement data of the first surface 10a is feed-forwarded to the second active material applying unit 260 so that the density of the first surface 10a may be reduced. The measurement data affects the application of the active material on the second surface 10b. For example, if it is determined that the active material density of the first surface 10a in the specific active material region 15 is lower than the target value, the active material is relatively applied to the second surface 10b of the active material region 15. The low density of the first surface 10a is compensated for by increasing the supply flow rate of the active material slurry.

The integrated control unit 300 allows the density measurement data of the first surface 10a to be reflected when the active material is applied onto the second surface 10b. For example, the integrated control unit 300 tracks the position coordinates of the active material region 15 in which the density measurement value of the first surface 10a is less than the target value so that the active material region 15 is coated with the second active material. When entering the unit 260, the second active material applying unit 260 is controlled to increase the discharge pressure or the supply flow rate of the active material slurry supplied onto the second surface 10b of the electrode base material 10, thereby providing the first surface. Compensate for the low active material density of (10a).

As such, the position coordinates of the specific active material region 15 are traced from the measurement data of the first density measuring unit 230 disposed at different positions on the transport path, and the second active material 15 at the point of time when the corresponding active material region 15 enters. The applicator 260 can be controlled because the position coordinates of the active material region 15 are stored together with the density measurement data.

As shown in FIG. 2, the position coordinates of the active material region 15 are sequentially numbered according to the order of the active material regions 15 discontinuously arranged from the tip 10S of the electrode base material 10. 1, # 2, # 3, # 4). In this case, the second active material applying unit 260 includes a detection sensor (not shown) for detecting the active material region 15, and the detection sensor is the first active material region conveyed for the first time based on the order of conveyance along the transport direction. Starting from (15), the pulse signal can be output in correspondence with each active material region 15. Accordingly, by counting the pulses output from the sensing sensor, the order of the active material regions 15 currently passing through the second active material applying unit 260 can be confirmed, and the active material regions 15 having a relatively low active material density can be identified. The flow rate of the active material slurry can be increased accordingly.

As another embodiment, the position coordinates of the active material region 15 may be calculated using the encoder 241 associated with the transfer distance of the electrode base material 10. That is, as shown in Figure 2, the position coordinates of the active material region 15, the specific active material region 15 from the tip 10S of the electrode base material 10 to reach the first density measuring unit 230. It can be expressed as a conveying distance (L), that is, the distance from the front end (10S) of the electrode base material 10 to the active material region 15, the second active material coating portion (1) Considering the additional transport distance up to 260, it is possible to know when the active material region 15 reaches the second active material application part 260. At this point in time, the coating state of the active material region 15 can be controlled. In this embodiment, since the position of the said active material region 15 can be grasped | ascertained from the overall conveyance distance of the electrode base material 10, the detection sensor of the 2nd active material application part 260 is not necessary.

Meanwhile, the first position calculator 240 may include a plurality of sensing sensors 242 arranged along the width direction of the electrode base material 10. The detection sensors 242 may sense the boundary of the active material region 15 at different positions along the width direction, thereby detecting a curved defect in which a profile formed by the boundary of the active material region 15 is curved. For example, the integrated control unit 300, which has confirmed a curved defect based on the output signal of the detection sensor 242, enters the press molding unit 297 by tracking the position coordinates of the active material region 15 of the defect. It is possible to output a warning message to the operator to remove the active material region 15 from the electrode base material 10 or stop the transfer of the electrode base material 10.

Referring to FIG. 6, a second density measuring unit 280 is disposed downstream of the second drying unit 270 along the conveying direction of the electrode base material 10. The second position calculator 290 is disposed adjacent to the second density measurer 280.

The second density measuring unit 280 scan-drives in the width (W) direction on the second surface 10b of the electrode base material 10, and measures the density of the active material region 15, and a density meter 281. It may include a controller 285 for controlling the overall metrology operation.

The second position calculator 290 calculates the position coordinates of the active material region 15 that is currently measured by passing through the second density measurement unit 280. To this end, the second position calculator 290 may include an encoder 291 and a sensing sensor 292, and count the pulse signals output from the encoder 291 and the sensing sensor 292 to obtain position coordinates. A calculation controller 295 for calculating.

The density measurement data output from the second density measurement unit 280 and the position coordinates of the measurement target output from the second position calculation unit 290 are transmitted to the integrated control unit 300, and the integrated control unit 300 controls the density. The measurement data and the position coordinates of the measurement object are stored in association with each other.

The integrated control unit 300 stores the density measurement data and the measurement target position coordinates in association with each other, and returns a measurement value out of an allowable range to the second active material applying unit 260 to restore the active material application state of the second surface 10b. To control. For example, the integrated control unit 300 receives the density measurement value and the target value, performs the feedback control, and applies the second active material to increase the discharge pressure or the supply flow rate of the active material slurry supplied onto the electrode base material 10. The unit 260 may be controlled.

The integrated control unit 300 stores the density measurement data of the first and second surfaces 10a and 10b in association with the position coordinates, and the position of the integrated control unit 300 with respect to the active material region 15 whose density measurement data is less than the allowable range. The active material region 15 may be removed and repaired by stopping the transfer of the electrode base material 10 and outputting a warning message to an operator before entering the press molding part 297 by tracking the coordinates. .

The second position calculator 290 may include a plurality of detection sensors 292 arranged along the width direction of the electrode base material 10. The detection sensors 292 may detect a curved defect in which a profile formed by the boundary of the active material region 15 is curved in a curved shape by detecting the boundary of the active material region 15 at different positions along the width direction. . For example, the integrated control unit that checks the curved defect based on the output signal of the detection sensor 292, tracks the position coordinates of the active material region 15 of the defect and enters the electrode base material before entering the press molding unit 297. The operator may output a warning message or stop the transfer of the electrode base material to remove the active material region 15 from 10.

As shown in FIG. 8, the sensing sensor 292 is disposed up and down on the transfer path of the electrode base material 10, and the first sensing sensor disposed toward the first surface 10a of the electrode base material 10. 292a and a second sensing sensor 292b disposed toward the second surface 10b of the electrode base material 10. The first detection sensor 292a detects the boundary of the active material region 15a on the first surface 10a, and the second detection sensor 292b detects the boundary of the active material region 15b on the second surface 10b. Can be detected.

The active material regions 15a and 15b on the first and second surfaces 10a and 10b are preferably formed at the same position, and are preferably formed at the same position so as to overlap each other. Due to a process error, boundaries of the active material regions 15a and 15b of the first and second surfaces 10a and 10b may form a step st with respect to each other. A step st formed by the active material regions 15a and 15b of 10b may be detected from the first and second sensing sensors 292a and 292b.

For example, a first time point at which the first detection sensor 292a detects a boundary of the active material region 15a of the first surface 10a and a second detection sensor 292b are the active material of the second surface 10b. If a time difference exceeding the allowable range occurs between the second time points at which the boundary of the area 15b is detected, the operation controller 295 or the integrated control unit 300 connected to the operation controller 295 may determine a st defect. In addition, before entering the press molding part 297 by tracking the position coordinates of the active material regions 15a and 15b in which the step st is present, the electrode base material 10 may be stopped or the warning message may be output. Allow the operator to remove st defects or rework.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: electrode base material 10a: first surface of the electrode base material
10b: second surface of electrode base material 10S: tip of electrode base material
15: active material region 110: active material coating portion
111: die coater 115: controller
120: drying unit 121: blower for hot air supply
122: exhaust duct 130: density measuring unit
131: density meter 135: controller
140: position calculator 141: encoder
142: detection sensor 145: arithmetic controller
150: press molding part 151, 152: press roller
180: integrated control unit 210: first active material coating unit
211: die coater 215: controller
220: first drying unit 230: first density measuring unit
231: density meter 235: controller
240: first position calculator 241: encoder
242: detection sensor 245: arithmetic controller
250: press molding part 251, 252: press roller
260: second active material coating portion 261: die coater
265: controller 270: second drying unit
280: second density measuring unit 281: density measuring instrument
285: controller 290: second position calculator
291: encoder 292: detection sensor
295: operation controller 300: integrated control unit
θ: tilting angle of die coater g: gap size
W: width of electrode base material R: transfer means

Claims (18)

An active material coating part applying an active material on the electrode base material continuously transferred to form a plurality of active material areas along the length direction of the electrode base material;
A density measuring unit for measuring an active material density in the active material region;
A position calculator for calculating a position coordinate of the active material region which is a measurement target via the density measurer; And
And an integrated control unit for storing the density measurement data output from the density measuring unit and the position coordinates of the active material region output from the position calculating unit.
And a drying unit disposed between the active material applying unit and the density measuring unit along the transfer path of the electrode base material, and performing a drying process of the active material region. The method of claim 1,
The position coordinate of the said active material area shows the position of the said active material area | region along the longitudinal direction from the front-end | tip of the said electrode base material, The electrode plate forming apparatus characterized by the above-mentioned. The method of claim 2,
The position calculator includes an encoder connected to a driving motor for continuously supplying an electrode base material to the position calculator,
The position coordinates of the active material region are calculated from the number of pulses output from the encoder from the tip of the electrode base material until the active material region passes through the density measuring unit. The method of claim 1,
And the position coordinates of the active material region indicate the order of the active material regions sequentially numbered according to the arrangement order for the plurality of active material regions arranged from the tip of the electrode base material. 5. The method of claim 4,
The position calculator includes a detection sensor that recognizes a boundary of an active material region formed discontinuously on the electrode base material,
And the position coordinates of the active material region are calculated from the number of pulses of a sensing sensor output corresponding to the active material region. delete The method of claim 1,
The integrated control unit is an electrode plate forming apparatus, characterized in that for inputting the density measurement data, and performing feedback control to control the active material applying unit so that the density of the active material follows the target value. The method of claim 7, wherein
The active material applying unit includes a die coater for discharging the active material in the form of a slurry onto the electrode base material,
And the integrated control unit controls at least one of a discharge pressure of the die coater, a tilting angle of the die coater, and a gap size between the die coater and an application surface of the electrode base material. The method of claim 1,
The position calculation unit,
Recognizing the boundary of the active material region formed discontinuously on the electrode base material, comprising a plurality of sensing sensors arranged along the width direction of the electrode base material,
And a curved defect in which a boundary of an active material region is curved according to pulse signals output from the sensing sensors. A first active material coating part which forms an active material region on the first surface by applying an active material on the first surface of the electrode base material continuously transferred; And
And a second active material coating part for coating an active material on a second surface of the electrode base material to form a plurality of active material regions on the second surface.
A first density measuring unit disposed between the first and second active material applying units and measuring an active material density of the active material region of the first surface; And
A first position calculator configured to calculate position coordinates of the active material region to be measured via the first density measurer; And
And an integrated control unit which stores the density measurement data of the first surface output from the first density measuring unit and the position coordinates of the active material region output from the first position calculating unit.
And a first drying unit disposed between the first active material applying unit and the first density measuring unit along the transfer path of the electrode base material, and performing a drying treatment of the active material region. . The method of claim 10,
The integrated control unit is an electrode plate forming apparatus, characterized in that for inputting the density measurement data of the first surface, and performing feedback control to control the first active material coating unit so that the density of the active material follows the target value. The method of claim 10,
And the integrated control unit inputs the density measurement data of the first surface and controls the second active material applying unit to compensate for the density of the active material of the first surface. delete The method of claim 10,
A second density measuring unit configured to measure an active material density of an active material region of a second surface downstream of the second active material applying unit in a conveying direction of the electrode base material; And
And a second position calculator configured to calculate the position coordinates of the active material region that is the measurement target via the second density measurer. 15. The method of claim 14,
The integrated control unit stores the density measurement data of the second surface output from the second density measuring unit and the position coordinates of the active material region output from the second position calculating unit in association with each other. . 15. The method of claim 14,
And the integrated control unit controls the second active material applying unit so that the density measurement data of the second surface is input and performs feedback control to follow the target value. 15. The method of claim 14,
And a second drying unit disposed between the second active material applying unit and the second density measuring unit along the transfer path of the electrode base material, and performing a drying treatment of the active material region. . 15. The method of claim 14,
The second position calculation unit,
A first sensing sensor disposed toward the first surface of the electrode base material and sensing a boundary of an active material region on the first surface; And
And a second sensing sensor disposed toward the second surface of the electrode base material and sensing a boundary of an active material region on the second surface.
The electrode plate forming apparatus of claim 1, wherein the boundary of the active material regions of the first and second surfaces forms a step difference between each other according to the output signals of the first and second detection sensors.

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