KR102459079B1 - Overhang inspection device for secondary battery and manufacturing system having the same - Google Patents

Abstract

An overhang inspection apparatus for a secondary battery is disclosed. An overhang inspection apparatus for a secondary battery according to the present invention includes a jig unit for a stack for clamping an electrode stack provided by alternating anode and anode with a separator therebetween, and an electrode stack clamped to the jig unit for a stack. It includes a plurality of inspection imaging units for imaging at mutually different angles, and a position variable unit for a laminate that is connected to the jig unit for a laminate and moves the electrode laminate relative to the inspection imaging unit.

Description

Overhang inspection device for secondary battery and secondary battery manufacturing system having the same

The present invention relates to an overhang inspection apparatus for a secondary battery and a secondary battery manufacturing system having the same, and more particularly, to an electrode of an electrode stack produced by alternately stacking electrodes with a separator therebetween ( Short circuit) to a secondary battery overhang inspection apparatus capable of inspecting whether or not, and to a secondary battery manufacturing system having the same.

In general, a secondary cell converts chemical energy into electrical energy to supply power to an external circuit, and when discharged, receives external power and converts electrical energy into chemical energy to store electricity refers to Such a secondary battery is also commonly referred to as a capacitor.

Such secondary batteries may be variously classified according to the structure of the electrode stack. For example, the secondary battery may be classified into a stack type structure, a wound type structure, a stack/folding type structure, and the like.

Among the various classifications, the stacked structure cuts an electrode, that is, an anode and a cathode to a predetermined size, and then places a separator P between the anode E1 and the cathode E2 as shown in FIG. It indicates that the anode E1 and the cathode E2 are alternately laminated to form the electrode laminate M. This stacking process is performed in a stacking device for secondary batteries. In this electrode stack M, the positive electrode E1 may protrude laterally, and a portion protruding laterally in this way is called an overhang portion.

On the other hand, during the stacking process, some of the electrodes E1 and E2 stacked on the electrode stack M as shown in FIG. defects may occur. That is, when the distal ends of some of the electrodes E1 and E2 protrude to the side excessively (out of the reference value) compared to the other electrodes E1 and E2, the overhang portions of the protruding electrodes E1 and E2 are in contact with each other. A short circuit (short circuit) may occur, and the secondary battery in which the short circuit (short circuit) of the electrodes E1 and E2 occurs in this way cannot be used.

The excessively protruding overhang portion of the electrodes E1 and E2 (out of the reference value) is mainly caused by lamination defects. Defects may occur in the entire manufactured product.

Therefore, there is a need to develop an inspection device capable of inspecting the overhang portion of the electrodes E1 and E2 protruding excessively (out of the reference value) during the manufacturing process of the inline secondary battery in the inline equipment.

Republic of Korea Patent Publication No. 10-2013-0105578, (2013.09.25.)

Therefore, the technical problem to be achieved by the present invention is an overhang inspection apparatus for a secondary battery capable of detecting the overhang portion of the electrodes by quickly and efficiently inspecting an electrode stack formed by stacking electrodes during the manufacturing process of a secondary battery consisting of inline. And to provide a secondary battery manufacturing system having the same.

According to an aspect of the present invention, there is provided a jig unit for a laminate for clamping the electrode laminate provided by alternating the negative electrode and the positive electrode with a separator therebetween; a plurality of inspection imaging units for imaging the electrode stack clamped to the stacked body jig unit at different angles; And it is connected to the jig unit for the laminate, the overhang inspection apparatus for a secondary battery comprising a position variable unit for the laminate to move the electrode laminate relative to the imaging unit for inspection may be provided.

The inspection imaging unit may include: a first radiation emitting unit emitting radiation toward the electrode stack; a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined first separation angle with respect to the electrode stack; a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter; and a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter.

The first separation angle may be 95 degrees to 115 degrees.

The inspection imaging unit may include: a first radiation emitting unit emitting radiation toward the electrode stack; a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined second separation angle with respect to the electrode stack; a third radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the second radiation emitting part by a third separation angle with respect to the second radiation emitting part with respect to the electrode stack; a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter; a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter; and a third radiation detector that is spaced apart from the third radiation emitter and detects the radiation emitted from the third radiation emitter.

The second separation angle may be 60 degrees to 80 degrees.

The third separation angle may be 60 degrees to 80 degrees.

The second separation angle and the third separation angle may be the same.

The position variable unit for the laminate includes a rotation block unit to which the jig unit for the laminate is coupled; and a rotation driving unit coupled to the rotation block unit and rotating the rotation block unit.

According to another aspect of the present invention, a crossover device for a secondary battery for generating an electrode stack by alternating the anode and the cathode with a separator therebetween; and an overhang inspection device for secondary batteries that receives the electrode stack produced by the crossover device for secondary batteries and captures an image of the electrode stack, wherein the overhang inspection device for secondary batteries includes clamping the electrode stack a jig unit for a laminate; a plurality of inspection imaging units disposed adjacent to the jig unit for the stack and photographing the electrode stack from different angles; and a position variable unit for a stack connected to the jig unit for the stack, and configured to move the electrode stack relative to the imaging unit for inspection.

The inspection imaging unit may include: a first radiation emitting unit emitting radiation toward the electrode stack; a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined first separation angle with respect to the electrode stack; a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter; and a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter.

The first separation angle may be 95 degrees to 115 degrees.

The inspection imaging unit may include: a first radiation emitting unit emitting radiation toward the electrode stack; a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined second separation angle with respect to the electrode stack; a third radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the second radiation emitting part by a third separation angle with respect to the second radiation emitting part with respect to the electrode stack; a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter; a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter; and a third radiation detector that is spaced apart from the third radiation emitter and detects the radiation emitted from the third radiation emitter.

Each of the second separation angle and the third separation angle may be 60 degrees to 80 degrees.

The second separation angle and the third separation angle may be the same.

The position variable unit for the laminate includes a rotation block unit to which the jig unit for the laminate is coupled; and a rotation driving unit coupled to the rotation block unit and rotating the rotation block unit.

According to the present invention, a plurality of inspection imaging units arranged adjacent to the jig unit for a laminate for clamping the electrode laminate and imaging the electrode laminate from different angles, and the electrode laminate being relatively moved with respect to the inspection imaging unit By providing a position variable unit for the stacked body, it is possible to reduce the rotation angle of the electrode stacked body during the inspection process, thereby reducing the time required for the inspection.

1 is a diagram illustrating a state in which electrodes of a secondary battery are stacked.
2 is a diagram illustrating a secondary battery manufacturing system according to a first embodiment of the present invention.
3 is a view of the inside of the overhang inspection apparatus for a secondary battery of FIG. 2 viewed from the top.
FIG. 4 is a view showing a jig unit for a laminate and a position variable unit for a laminate of FIG. 3 .
FIG. 5 is a view showing the jig unit for a laminate of FIG. 4 .
FIG. 6 is a plan view of FIG. 5 .
Fig. 7 is a side view of Fig. 5;
FIG. 8 is a view showing the inside of the first radiation emitting part of FIG. 3 .
9 is a view showing an imaging unit for inspection of a secondary battery manufacturing system according to a second embodiment of the present invention.
FIG. 10 is a diagram illustrating electrical connection of electrodes of the radiation emitting part of FIG. 9 .
11 is a diagram illustrating a secondary battery manufacturing system according to a third embodiment of the present invention.
12 is a view showing the inspection imaging unit of FIG. 9 .

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. However, in describing the present invention, a description of a function or configuration already known will be omitted in order to clarify the gist of the present invention.

2 is a view showing a secondary battery manufacturing system according to a first embodiment of the present invention, FIG. 3 is a view of the inside of the overhang inspection apparatus for a secondary battery of FIG. 2 viewed from the top, and FIG. 4 is a view of FIG. It is a view showing a jig unit for a laminate and a position variable unit for a laminate, FIG. 5 is a view showing the jig unit for a laminate of FIG. 4, FIG. 6 is a plan view of FIG. 5, FIG. 7 is a side view of FIG. FIG. 8 is a view showing the inside of the first radiation emitting part of FIG. 3 .

The secondary battery manufacturing system according to this embodiment, as shown in FIGS. 2 to 8 , a secondary battery crossing device (SC), an inspection transfer device 200 , and a secondary battery overhang inspection device 100 ), an external surface inspection device (SD), a tape automated bonding (TAB) device, a transfer device (SF) for delivery, an electrode in/out device 300, and a control unit (not shown).

The crossover device SC for a secondary battery alternately crosses a negative electrode (not shown) and a positive electrode (not shown) with a separator (not shown) interposed therebetween to produce an electrode stack.

This crossover device for secondary batteries supplies a device body (not shown), a positive electrode supply unit (not shown) for supplying a positive electrode (not shown), a supply unit (not shown) for supplying a negative electrode (not shown), and a separator (not shown). and a supply unit (not shown) and a mobile crossover unit (not shown).

A mobile crossover unit (not shown) forms a place where an anode (not shown), a cathode (not shown), and a separator (not shown) intersect, such a mobile crossover unit (not shown) includes an anode supply (not shown) and a cathode The cross operation is performed while moving between the supply units (not shown).

The inspection transfer device 200 transfers the electrode stack produced in the secondary battery crossover device SC. The inspection transfer device 200 is connected to the secondary battery crossover device SC and the secondary battery overhang inspection device 100 to transfer the electrode stack to the secondary battery overhang inspection device 100 .

In addition, the transfer device for inspection 200 is connected to the transfer device for transfer (SF) to transfer the overhang inspection is completed to transfer the transfer device (SF) for the electrode stack.

This inspection transfer device 200, as shown in FIGS. 2 to 7, transfers the electrode stack to be imaged by the inspection imaging unit 120 to be described later of the overhang inspection apparatus 100 for secondary batteries. It includes a transfer unit 210 for supply and a transfer unit 220 for discharging disposed adjacent to the overhang inspection apparatus 100 for secondary batteries and transferring the electrode stack imaged by the inspection imaging unit 120 .

The supply conveying unit 210 is a supply in which a plurality of supply conveyor rollers (not shown) that support the electrode laminate and transport the electrode laminate by rotation, and a supply conveyor roller (not shown) are rotatably coupled. Includes a roller frame (not shown) for use.

The discharging conveying unit 220 is a discharging in which a plurality of discharging conveyor rollers (not shown) that support the electrode laminate and transfer the electrode laminate by rotation, and a discharging conveyor roller (not shown) are rotatably coupled Includes a roller frame (not shown) for use.

On the other hand, the overhang inspection apparatus 100 for secondary batteries receives the electrode stack manufactured by the crossover device SC for secondary batteries. The overhang inspection apparatus 100 for such a secondary battery takes an image of the electrode laminate.

The overhang inspection apparatus 100 for a secondary battery of this embodiment inspects an overhang region in which the distal end of some electrodes (not shown) protrude laterally compared to other electrodes (not shown) by imaging the received electrode stack. do.

The overhang inspection apparatus 100 for a secondary battery is, as shown in FIGS. 3 to 7 , a jig unit 110 for a laminate for clamping an electrode laminate, and an electrode stack clamped to the jig unit 110 for a laminate. A plurality of inspection imaging units 120 for imaging the body at mutually different angles, and a position variable unit for a laminate that is connected to the jig unit 110 for a laminate and moves the electrode stack relative to the inspection imaging unit 120 . 130 and the jig unit 110 for the laminate, the imaging unit 120 for inspection, and the position variable unit 130 for the laminate are disposed therein and includes a radiation shielding wall 129 for shielding radiation.

The inspection imaging unit 120 captures images of the electrode stack clamped to the stack jig unit 110 at different angles.

The imaging unit 120 for inspection according to the present embodiment, as shown in FIG. 3, includes a first radiation emitting unit 121 that emits radiation toward the electrode stack, and emits radiation toward the electrode stack. The second radiation emitting part 122 and the first radiation emitting part 121 are spaced apart from the first radiation emitting part 121 by a predetermined first separation angle G1 based on the electrode stack. The first radiation detector 126 is spaced apart from each other and detects the radiation emitted from the first radiation emitter 121 , and the second radiation emitter 122 is spaced apart from the second radiation emitter 122 . ) and a second radiation detection unit 127 for detecting the radiation emitted from, and a support for the emission unit (not shown) for supporting each of the radiation emission units (121, 122).

In this embodiment, X-rays are used as radiation, and the first radiation emitting unit 121 and the second radiation emitting unit 122 emit X-rays. Since the first radiation emitting part 121 and the second radiation emitting part 122 have the same structure, the structure of the first radiation emitting part 121 will be described below for convenience of explanation and the second radiation emitting part The structure of 122 is replaced with the description of the first radiation emitting unit 121 .

The first radiation emitting part 121 and the second radiation emitting part 122 according to the present embodiment are formed in a structure using carbon nanotubes. As shown in FIG. 8 , the first radiation emitting part 121 includes an emitter 121a corresponding to a cathode, a gate electrode 121b disposed on an upper region of the emitter 121a, and a gate electrode. It includes a target anode 121c disposed on the upper region of the 121b, and a focus electrode 121d disposed between the gate electrode 121b and the target anode 121c.

A cathode power is connected to the emitter 121a, and an electron beam is emitted from the emitter 121a. In this embodiment, carbon nanotubes are used for the emitter 121a. The carbon nanotubes are formed in a paste form, applied on a substrate, patterned through exposure, etc., and then proceeded through a firing process and a surface treatment process.

As described above, the radiation emitting unit 121 of this embodiment uses the emitter 121a to which carbon nanotubes are applied rather than a filament, thereby solving the problems of X-ray preheating time, response time, and double shielding structure. That is, in the case of using a filament emitter, it takes about 8 seconds to reach 130kV/300uA, which is capable of CT examination in an OFF state that does not emit X-rays. Therefore, in order to shorten the inspection time, the radiation emitting unit (not shown) is maintained in an always-on state, and a shutter that opens and closes only the radiation emitting unit (not shown) in addition to the radiation shielding wall 129 is installed. Although a double shielding structure has been proposed, there is a problem in that the structure is complex, consumes a lot of power, and breaks down frequently, which consumes a lot of money for maintenance.

On the other hand, the first radiation emitting unit 121 having the emitter 121a to which carbon nanotubes are applied as in the present embodiment is up to 130kV/300uA capable of CT examination in an OFF state that does not emit X-rays. Since it takes only tens of nanoseconds (ns) to reach, the radiation emitting unit 121 does not need to be kept in an always-on state, so a double shielding structure is not required, and there is an advantage of high stability and high service life.

The gate electrode 121b is disposed on the upper region of the emitter 121a. A gate power supply (not shown) for applying or releasing a higher potential than that of the cathode is connected to the gate electrode 121b. An electron beam is emitted from the emitter 121a by the potential difference between the voltage applied to the gate electrode 121b and the cathode.

A plurality of gate holes (not shown) are formed in the gate electrode 121b at a constant pitch, and electrons emitted from the emitter 121a pass through the gate hole (not shown) to advance to the target anode 121c.

The target anode 121c is disposed on the upper region of the gate electrode 121b. A voltage having a higher potential than that of the gate electrode 121b is applied to the target anode 121c. Accordingly, the electron beam emitted from the emitter 121a and passing through the gate electrode 121b is accelerated in the direction of the target anode 121c to reach the target anode 121c.

A target (not shown) emitting X-rays by collision of incident electrons is provided on the target anode 121c. This target is disposed on the lower surface facing the cathode as one surface of the anode 121c for the target. In this embodiment, the lower surface of the anode 121c for the target is formed in an inclined shape forming an acute angle with the direction in which electrons are incident. Accordingly, when electrons are incident on the target anode 121c, X-rays can be generated and emitted in a direction symmetrical to the electron incident angle with respect to the normal direction of the inclined surface. That is, the generated X-rays are emitted in the direction shown in FIG.

The focus electrode 121d is disposed between the gate electrode 121b and the target anode 121c. The focusing electrode focuses the electron beam passing through the gate electrode 121b at a high density and guides it to the target anode 121c. That is, the electrons passing through the gate electrode 121b gradually spread due to the repulsive force between the electrons, so the focus electrode 121d focuses the electron beam to direct the electrons to the focal spot of the target anode 121c. . The focus electrode 121d is formed in a cylindrical shape with a hole formed in the center.

The first radiation emitting part 121 and the second radiation emitting part 122 are disposed to be spaced apart from each other by a predetermined first spacing angle G1 with respect to the electrode stack as a reference. The first separation angle G1 is 95 degrees to 115 degrees, and in this embodiment, the first separation angle G1 is 105 degrees.

The imaging unit 120 for inspection according to the present embodiment includes the second radiation emitting unit 122 spaced apart from the first radiation emitting unit 121 by a first separation angle G1, so that the inspection process It is possible to reduce the relative rotation angle of the electrode stack with respect to the first radiation emitting part 121 and the second radiation emitting part 122, thereby shortening the inspection time.

Each of the first radiation detector 126 and the second radiation detector 127 is disposed to be spaced apart from the first radiation emitter 121 and the second radiation emitter 122, so that the first radiation emitter 121 and the second radiation detector 127 are disposed. 2 The radiation emitted from each of the radiation emitting units 122 is detected. The first radiation detector 126 and the second radiation detector 127 according to the present embodiment respond to the X-rays emitted from the first radiation emitter 121 and the second radiation emitter 122 and visually display them, The shape of the electrodes stacked on the electrode stack disposed between the detectors 121 and 122 and the radiation emitters 126 and 127 may be visually displayed, and thus the overhang of the electrode of the electrode stack is possible. The site can be visually observed.

The jig unit 110 for the laminate is coupled to the upper portion of the position variable unit 130 for the laminate. The jig unit 110 for the stacked body clamps the electrode stacked body.

The jig unit 110 for the laminate is coupled to the position variable unit 130 for the laminate, as shown in FIGS. 5 to 7 , and a clamping movement driving unit 111e for moving the clamping units 111c and 111d for the laminate. to provide

The clamping parts 111c and 111d for the stacked body are moved in a direction approaching and spaced apart from the electrode stacked body to clamp and unclamp the electrode stacked body. The clamping parts 111c and 111d for the laminate are spaced apart from the first holding plate part 111c connected to the clamping movement driving unit 115 and the first holding plate part 111c, and are provided for clamping. and a second holding plate part 111d connected to the movement driving part 111e.

The electrode stack is disposed between the first gripping plate portion 111c and the second gripping plate portion 111d, and the first gripping plate portion 111c and the second gripping plate portion 111d are mutually By the movement in the approaching direction and the movement of the first holding plate part 111c and the second holding plate part 111d in the mutually spaced direction, the electrode stack is formed between the first holding plate part 111c and the second holding plate part 111c. It is clamped and unclamped by pressing and releasing the pressure by the plate part 111d for the finger.

The clamping movement driving unit 111e is coupled to the position variable unit 130 for the laminate. The clamping movement driving unit 111e moves the first holding plate part 111c and the second holding plate part 111d.

The clamping movement driving unit 111e according to the present embodiment is connected to the first holding plate part 111c and the second holding plate part 111d, and the first holding plate part 111c and the second holding plate part 111c. A gripping movement guide portion 111f for guiding the movement of the plate portion 111d, the first gripping plate portion 111c and the second gripping plate portion 111d are connected to each of the first gripping plate portion ( 111c) and a pair of gripping moving bars (111g) for moving each of the second gripping plate parts 111d in mutually approaching and mutually spaced directions, and a gripping moving bar (111g) connected to the gripping It includes a gripping movement driving unit (not shown) for moving the moving bar (111g).

The gripping movement guide portion 111f is provided in the shape of a guide rail to guide the movement of the first gripping plate portion 111c and the second gripping plate portion 111d.

A pneumatic cylinder (not shown) connected to the gripping moving bar 111g to move the first gripping plate portion 111c and the second gripping plate portion 111d may be used in the gripping movement driving unit (not shown). have.

The position variable unit 130 for a laminate is connected to the jig unit 110 for a laminate and is disposed under the jig unit 110 for a laminate. The position variable unit 130 for the stacked body rotates the electrode stack relative to the inspection imaging unit 120 .

As shown in FIG. 4, the position variable unit 130 for the stacked body is coupled to the rotary block part 131 to which the stacked body jig unit 110 is coupled, and the rotary block part 131 and the rotary block part 131 ) includes a rotation driving unit 132) for rotating.

The rotation block unit 131 is provided in a plate shape, and the jig unit 110 for a laminate is coupled to the upper surface of the rotation block unit 131 . The rotation block unit 131 is rotatably coupled to the rotation driving unit 132 .

The rotation driving unit 132 rotates the rotation block unit 131 . A rotation driving motor (not shown) connected to the rotation block unit 131 to rotate the rotation block unit 131 is mounted on the rotation driving unit 132 . The rotation driving unit 132 according to the present embodiment is supported by the support part (M).

The radiation shielding wall 129 is provided as a housing structure that shields the radiation detectors 121 and 122 and the radiation emitters 126 and 127 . The above-described radiation shielding wall 129 is provided with a through hole K through which the laminate passes.

On the other hand, the electrode draw-in/out device 300 transfers the electrode laminate supplied from the supply transfer unit 210 to the overhang inspection apparatus 100 for secondary batteries, and transfers the inspected electrode laminate to the discharge transfer unit 220 . transmit

As shown in FIG. 3 , the electrode withdrawing device 300 is a multi-joint robot body disposed inside a shielding wall 310 for a lead-in/out device that shields radiation and a shielding wall 310 for a pull-in/out device. (320).

The articulated robot body 320 includes a robot support body 321 supported on an installation surface, and an articulated arm 322 connected to the robot support body 321 and having at least three different axes.

In this embodiment, the articulated arm 322 is applied in a 6-axis structure having 6 different axes. That is, in the present embodiment, the multi-joint arm 322 grips and moves the electrode stack by different 6-axis motions.

On the other hand, the outer surface inspection device SD receives the electrode stack on which the overhang inspection process of the overhang inspection device 100 for secondary batteries has been performed through the transfer device SF for delivery. The outer surface inspection device SD inspects the outer surface of the electrode stack.

In this embodiment, the external surface inspection device SD is connected to a camera unit (not shown) that captures the outer surface of the electrode stack, and the camera unit (not shown) to control information acquired by the camera unit (not shown) It includes a communication unit (not shown) for transmitting to the unit.

A camera unit (not shown) captures the outer surface of the electrode stack. Such a camera unit (not shown) inspects whether foreign substances are attached to the outer surface of the electrode laminate and the external appearance of the electrode laminate by capturing an image of the outer surface of the electrode laminate.

On the other hand, the transport device for delivery (SF) is connected to the transport device for inspection 200 and the outer surface inspection device (SD) and passes the electrode stack passing through the overhang inspection device 100 for secondary batteries to the external surface inspection device (SD). ) to pass

In addition, the transfer device for delivery (SF) is connected to the outer surface inspection device (SD) and the TAB device (TAB) and transfers the electrode stack passing through the outer surface inspection device (SD) to the TAB device (TAB).

The transfer device SF includes a plurality of conveyors (not shown) for transferring the electrode stack, and a direction changer (not shown) for changing the transport direction of the electrode stack.

On the other hand, the control unit (not shown) according to this embodiment is a secondary battery crossover device (SC), an outer surface inspection device (SD), an overhang inspection device 100 for secondary batteries, a TAB device (TAB), a transfer for inspection Electrically connected to the device 200, the electrode withdrawing device 300, and the transfer device for delivery (SF), the secondary battery crossover device (SC), the outer surface inspection device (SD), the secondary battery overhang inspection device 100 ), the TAB device (TAB), the inspection transfer device 200, the electrode in-and-out device 300, and controls the operation of the transfer device (SF) for delivery.

Hereinafter, the operation of the secondary battery manufacturing system according to the present embodiment will be described with reference to FIGS. 2 to 8 , focusing on the overhang inspection apparatus 100 for secondary batteries.

First, the electrode stack on which the crossover process is completed in the crossover device SC for secondary batteries is transferred to the overhang inspection device 100 for secondary batteries by the electrode lead-in/out device 300 and is clamped in the jig unit 110 for the stack.

Thereafter, the position variable unit 130 for the laminate rotates the jig unit 110 for the laminate to rotate the electrode laminate, and the imaging unit 120 for inspection images the rotated electrode laminate, such as CT. A plurality of tomographic images are acquired. A plurality of tomography images acquired by the imaging unit 120 for inspection are recombined by a control unit (not shown).

As described above, the overhang inspection apparatus 100 for a secondary battery according to the present embodiment acquires a tomography image such as a CT for the electrode laminate, thereby more accurately displaying the structure of the edge region of the electrode laminate, thereby displaying the overhang region. can be accurately detected.

The electrode stack on which the inspection of the overhang inspection apparatus 100 for secondary batteries is completed is transferred to the TAB apparatus TAB through the outer surface inspection apparatus SD.

As described above, the secondary battery manufacturing system according to this embodiment is disposed adjacent to the jig unit 110 for a laminate for clamping the electrode laminate, and a plurality of inspection imaging units 120 for imaging the electrode laminate at different angles. ) and the position variable unit 130 for the laminate to move the electrode laminate relative to the imaging unit 120 for inspection, it is possible to reduce the time required for the inspection by reducing the rotation angle of the electrode laminate during the inspection process.

9 is a view showing an imaging unit for inspection of a secondary battery manufacturing system according to a second embodiment of the present invention, and FIG. 10 is a view showing electrical connection of electrodes of the radiation emitting part of FIG. 9 .

Hereinafter, a second embodiment of the present invention will be described. This embodiment differs from the first embodiment only in the configuration of the imaging unit 120 for inspection, and in other configurations, it is the same as the configuration of the first embodiment of FIGS. 2 to 8, so that there is a difference The configuration will be described.

The imaging unit 120 for inspection according to the present embodiment, as shown in FIG. 9, emits radiation toward the first radiation emitting unit 121 and the electrode stack and emits radiation toward the electrode stack. With respect to the first radiation emitting part 121 with respect to the electrode stack as a reference, the second radiation emitting part 122 is spaced apart by a predetermined second separation angle (G2) and emitting radiation toward the electrode stack, The third radiation emitting part 123 and the first radiation emitting part 121 are spaced apart from the second radiation emitting part 122 by a predetermined third separation angle G3 based on the electrode stack. The first radiation detector 126 is spaced apart from each other and detects the radiation emitted from the first radiation emitter 121 , and the second radiation emitter 122 is spaced apart from the second radiation emitter 122 . ), the second radiation detector 127 for detecting the radiation emitted from, and the third radiation detector arranged to be spaced apart from the third radiation emitter 123 and detect the radiation emitted from the third radiation emitter 123 . (128).

In this embodiment, since three radiation emitters 121, 122, and 123 are used, as shown in FIG. 10, each emitter 121a, gate An electrode 121b and a target anode 121c are provided. Three gate power sources GV1 , GV2 , and GV3 for applying or releasing a higher potential than that of the emitter 121a are connected to each of the gate electrodes 121b .

In the present embodiment, the first radiation emitting part 121 and the second radiation emitting part 122 are spaced apart from each other by a predetermined second spacing angle G2 with respect to the electrode stack body. The second separation angle G2 is 60 degrees to 80 degrees, and in this embodiment, the second separation angle G2 is 70 degrees.

Also, in the present embodiment, the second radiation emitting part 122 and the third radiation emitting part 123 are spaced apart from each other by a predetermined third spacing angle G3 with respect to the electrode stack body. The third separation angle G3 is 60 degrees to 80 degrees, and in this embodiment, the third separation angle G3 is 70 degrees, which is the same as the second separation angle G2.

The inspection imaging unit 120 according to the present embodiment includes a second radiation emitting unit 122 and a second radiation emitting unit spaced apart from the first radiation emitting unit 121 by a second separation angle G2. By providing the third radiation emitting part 123 that is spaced apart by the third separation angle G3 with respect to 122, the rotation angle of the electrode stack in the inspection process can be further reduced compared to the first embodiment, Accordingly, the inspection time can be further shortened.

11 is a view showing a secondary battery manufacturing system according to a third embodiment of the present invention, and FIG. 12 is a view showing the inspection imaging unit of FIG. 11 .

Hereinafter, a third embodiment of the present invention will be described. This embodiment differs from the first embodiment in that the electrode stack is delivered in-line to the overhang inspection apparatus 100 for secondary batteries, and in other configurations, the configuration of the first embodiment of FIGS. 2 to 8 is Since it is the same as , a configuration with a difference will be described below.

In the secondary battery manufacturing system according to the present embodiment, the jig unit 110 for a laminate clamping the electrode laminate is transferred by the inspection transfer device 200 in a state of being coupled to the position variable unit for the laminate.

Unlike the first embodiment, the secondary battery manufacturing system according to the present embodiment uses a jig unit 110 for a laminate clamping an electrode laminate and a position variable unit 130 for a laminate in-line to an imaging unit 120 for inspection. and an in-line delivery unit 500 for delivering.

The in-line transfer unit 500 includes an in-line supply unit 510 that moves the jig unit 110 for a laminate supplied from the transfer unit 210 for supply, and an electrode laminate that has been inspected by the imaging unit 120 for inspection. An in-line discharge unit 520 for transferring the jig unit 110 for a laminate to the conveying unit 220 for discharging is provided.

The in-line supply unit 510 transfers the jig unit 110 for a laminate clamped by the electrode laminate in the X-axis direction and the Y-axis direction intersecting the X-axis direction. As shown in FIG. 12 , the in-line supply unit 510 is disposed adjacent to the X-axis direction transfer unit 511 for transferring the jig unit 110 for a laminate in the X-axis direction, and the X-axis direction transfer unit 511 . and a Y-axis transfer unit 512 for transferring the jig unit 110 for a laminate in the Y-axis direction, is supported by the X-axis direction transfer unit 511 and is connected to the Y-axis transfer unit 512 in the Y-axis direction for upper transfer. It includes a lifting unit (not shown) for moving the transfer unit 512 in the vertical direction.

The X-axis direction transfer unit 511 transfers the jig unit 110 for the stacked body in which the electrode stack is clamped in the X-axis direction. The X-axis direction transfer unit 511 according to the present embodiment is, as shown in FIG. 12, a transfer roller unit rotatably coupled to an X-axis frame unit (not shown) and an X-axis frame unit (not shown) The first belt for supply 511b supported and rotated by the first belt 511b for supply, and the first belt for supply while being supported by a transfer roller part (not shown) that is rotatably coupled to the frame for the X-axis (not shown) A second belt portion 511c for supply that is disposed to be spaced apart in the Y-axis direction with respect to the portion 511b, and a first belt portion 511b for supply and a second belt portion 511c for supply connected to the transfer roller unit It includes a rotation driving unit (not shown) for rotating the.

The frame part (not shown) for the X-axis is supported by the inner frame (not shown) of the overhang inspection apparatus 100 for secondary batteries.

The first belt portion 511b for supply is formed in an endless track and is rotated while being supported by a conveying roller portion (not shown). In addition, the second belt portion for supply (511c), forming an endless track, is supported by a transfer roller (not shown) is rotated.

Y-axis direction transfer unit 512, as shown in Figure 12, the Y-axis frame portion (512a) disposed between the first belt portion (511b) for supply and the second belt portion (511c) for supply, A third belt portion 512b for supply that is supported and rotated by a transfer roller portion (not shown) rotatably coupled to the frame portion 512a for the Y-axis, and the transfer that is rotatably coupled to the frame portion 512a for the Y-axis. A fourth belt part 512c for supply that is supported by a roller unit (not shown) and rotates and is spaced apart in the X-axis direction with respect to the third belt part 512b for supply, and is connected to the conveying roller unit for supply and a rotation driving unit (not shown) for rotating the third belt unit 512b and the fourth belt unit 512c for supply.

The lifting unit (not shown) is supported by the X-axis direction transfer unit 511 and is connected to the Y-axis direction transfer unit 512 . This lifting unit (not shown) moves the Y-axis direction transfer unit 512 in the vertical direction.

The lifting unit (not shown) is, when the jig unit 110 for the laminate to which the electrode laminate is clamped moves in the X-axis direction through the X-axis transfer unit 511, the Y-axis direction transfer unit 512 is lowered for the laminate. The Y-axis direction transfer unit 512 does not interfere with the X-axis direction transfer of the jig unit 110 . On the other hand, when the electrode stack is to be transferred in the Y-axis direction to deliver the clamped jig unit 110 for the stacked body to the in-line discharge unit 520, the lifting unit (not shown) is the Y-axis direction transfer unit 512 . to separate the tray supported by the X-axis direction transfer unit 511 from the X-axis direction transfer unit 511 by raising the .

The in-line discharge unit 520 receives the jig unit 110 for a laminate clamping the electrode laminate from the Y-axis direction transfer unit 512 of the inline supply unit 510 and transfers it in the X-axis direction. Since the in-line discharge unit 520 has almost the same structure as the in-line supply unit 510 , a detailed structure thereof will be omitted for convenience of description hereinafter.

The inspection imaging unit 120 images the electrode stack transferred to the in-line discharge unit 520 . At this time, the position variable unit 130 for the laminate rotates the jig unit 110 for the laminate to rotate the electrode laminate.

As described above, the secondary battery manufacturing system according to the present embodiment has an advantage in that the inspection time can be shortened by transferring the electrode stack to the overhang inspection apparatus 100 for secondary batteries in-line.

Although the present embodiment has been described in detail with reference to the drawings above, the scope of the present embodiment is not limited to the drawings and description described above.

As such, the present invention is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

100: overhang inspection device for secondary battery 110: jig unit for laminate
120: imaging unit for inspection 121: first radiation emitting unit
122: second radiation emitting part 123: third radiation emitting part
126: first radiation detection unit 127: second radiation detection unit
128: third radiation detection unit 130: position variable unit for a laminate
131: rotation block unit 132: rotation drive unit
200: transfer device for inspection 210: transfer unit for supply
220: transfer unit for discharging 300: electrode in/out device
G1: first separation angle G2: second separation angle
G3: 3rd separation angle

Claims (15)

a jig unit for a laminate for clamping the electrode laminate provided by alternating the negative electrode and the positive electrode with a separator therebetween;
a plurality of inspection imaging units for imaging the electrode stack clamped to the stacked body jig unit at different angles; and
It is connected to the jig unit for the laminate and includes a position variable unit for the laminate for moving the electrode laminate relative to the inspection imaging unit,
The inspection imaging unit,
a first radiation emitting part emitting radiation toward the electrode stack;
a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined second separation angle with respect to the electrode stack;
a third radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the second radiation emitting part by a third separation angle with respect to the second radiation emitting part with respect to the electrode stack;
a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter;
a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter; and
and a third radiation detection unit disposed to be spaced apart from the third radiation emitting unit and configured to detect the radiation emitted from the third radiation emitting unit,
The jig unit for the laminate is,
a clamping part for a laminate that is moved in a direction approaching and spaced apart from the electrode laminate to clamp and unclamp the electrode laminate; and
An overhang inspection apparatus for a secondary battery coupled to the position variable unit for the laminate and including a clamping movement driving unit for moving the clamping unit for the laminate. delete delete delete According to claim 1,
The second separation angle is an overhang inspection apparatus for a secondary battery, characterized in that 60 to 80 degrees. According to claim 1,
The third separation angle is an overhang inspection apparatus for a secondary battery, characterized in that 60 to 80 degrees. According to claim 1,
The overhang inspection apparatus for a secondary battery, characterized in that the second separation angle and the third separation angle are the same. According to claim 1,
The position variable unit for the laminate,
a rotating block unit to which a jig unit for a laminate is coupled; and
An overhang inspection apparatus for a secondary battery coupled to the rotation block unit and including a rotation driving unit for rotating the rotation block unit. a crossover device for a secondary battery that alternately crosses the anode and the cathode with a separator interposed therebetween to produce an electrode stack; and
and an overhang inspection device for secondary batteries that receives the electrode stack produced by the crossover device for secondary batteries, and images the electrode stack,
The overhang inspection device for the secondary battery,
a jig unit for a laminate for clamping the electrode laminate;
a plurality of inspection imaging units disposed adjacent to the jig unit for the stack and photographing the electrode stack from different angles; and
and a position variable unit for a stack connected to the jig unit for the stack, and configured to move the electrode stack relative to the imaging unit for inspection.
The inspection imaging unit,
a first radiation emitting part emitting radiation toward the electrode stack;
a second radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the first radiation emitting part by a predetermined second separation angle with respect to the electrode stack;
a third radiation emitting part that emits radiation toward the electrode stack and is disposed to be spaced apart from the second radiation emitting part by a third separation angle with respect to the second radiation emitting part with respect to the electrode stack;
a first radiation detector that is spaced apart from the first radiation emitter and detects the radiation emitted from the first radiation emitter;
a second radiation detector that is spaced apart from the second radiation emitter and detects the radiation emitted from the second radiation emitter; and
and a third radiation detector disposed to be spaced apart from the third radiation emitting part and configured to detect the radiation emitted from the third radiation emitting part,
The jig unit for the laminate is,
a clamping part for a laminate that is moved in a direction approaching and spaced apart from the electrode laminate to clamp and unclamp the electrode laminate; and
A secondary battery manufacturing system coupled to the position variable unit for the laminate and including a clamping movement driving unit for moving the clamping unit for the laminate. delete delete delete 10. The method of claim 9,
The secondary battery manufacturing system, characterized in that each of the second separation angle and the third separation angle is 60 degrees to 80 degrees. 10. The method of claim 9,
The secondary battery manufacturing system, characterized in that the second separation angle and the third separation angle are the same. 10. The method of claim 9,
The position variable unit for the laminate,
a rotating block unit to which a jig unit for a laminate is coupled; and
A secondary battery manufacturing system coupled to the rotating block unit and including a rotating driving unit for rotating the rotating block unit.

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