DE102017223834A1 - Examination device and winding device - Google Patents

Abstract

Task is to provide an examination device, etc., wherein the quality of a winding element can be assessed more precisely and also the reliability of the investigation can be sufficiently increased werden.Gelöst the task by an examination device, the object to be examined are layers (2-5) on a winding core (13, 14) are wound, and the illumination devices (19a, 19b) for irradiating the examination subject, a camera (20) for receiving the examination subject irradiated with light by the illumination devices (19a, 19b), a recording timing control means including Time of the recording by the camera (20) controls, and has a quality judging means which judges the quality of the examination object based on the images obtained by the camera (20). The winding core (13, 14) has a non-circular contour at a cross-section orthogonal to its axis of rotation. The recording timing control means controls the timing of the photographing by the camera (20) in accordance with the rotational angle of the winding core (13, 14) such that the photographing takes place when the camera (20) focuses the examination subject.

Description

Technical area

The present invention relates to an inspection apparatus for inspecting a winding member used for secondary cells and the like, and a winding apparatus having the inspection apparatus.

General state of the art

As a winding element, an element used for secondary cells such as lithium-ion batteries and the like is known. This type of winding element is made by winding a cathode layer coated with a cathode active material and an anode layer coated with an active anode material with a separator layer therebetween, which serves to insulate the two electrode layers, through a rotatable winding core.

However, during winding of the layers, winding deviation sometimes occurs (positional shift in the sheet width direction), or the coating position of the active material is offset, whereby positional deviations in the sheet width direction may occur at the forming portion of the winding member. Positional deviations of this kind may cause short circuits and the like, for example, and the quality of the winding element may be impaired.

Therefore, as an inspection device for checking the presence of winding deviations, a device has been proposed wherein a receiving means (a pickup device) disposed in correspondence with a sheet transporting path upstream of the winding core (a rotary shaft) receives and bases the separator sheet and the separator sheet through the electrode sheets the acquisition data obtained performs a study of winding deviations (see, for example, Japanese Patent Laid-Open Publication No. 2009-170136).

However, this inspection device only checks for position deviations before being wound onto the winding core. Therefore, there is a possibility that the quality evaluation result of the inspection apparatus and the quality of the winding member actually obtained by winding the sheets do not agree. Thus, there is the danger that no precise assessment of the quality of the winding element is possible.

Therefore, an inspection apparatus has been proposed which picks up the layers wound on the winding core and judges whether winding deviations exist in the winding element based on the obtained image (for example, see Japanese Patent Laid-Open Publication No. 2006-145298, Japanese Patent Laid-Open Publication No. 2016-58179).

Brief description of the invention

Object of the invention

However, it is desirable to greatly increase the measurement resolution (resolution of the images) in such an assay device from the viewpoint of enhancing the reliability of the study.

Increasing the measurement resolution, however, causes the imaging depth of the recording medium to decrease. In the course of winding the layers, when the layers wound on the winding core become thicker and the positions to be picked up approach the receiving means, it is difficult to focus the layers so that there is a danger of a blurred image.

On the other hand, a configuration is conceivable in which the layers are focused after the winding of some layers, but in this case it is difficult to focus layers immediately after the start of the winding, that is to say to be picked up, which are far away from the receiving means, so that the Danger of a blurred image exists.

Thus, if the imaging depth is decreased to increase the measurement resolution, it is not possible to sufficiently consider the change in the distance between the layers and the receiving means in the course of winding, so that there is a risk that the reliability of the examination can not be increased sufficiently.

Therefore, it is an object of the present invention to provide an inspection apparatus and a winding apparatus, wherein the quality of a winding member can be more accurately judged and, moreover, the reliability of the inspection can be sufficiently increased.

Means for solving the problem

In the following, means for solving the problem will be described in detail. If necessary, the respective effects of the funds are also listed.

Means 1

An inspection device that is involved in the manufacturing process of a winding element is used, which is prepared by a tape-shaped cathode layer and anode layer, which are coated with an active material and are stacked with a formed of an insulating material band-shaped separating layer therebetween, wound by a rotatable winding core, characterized by an irradiation means, the on the Winding core has wound layers as the examination object and irradiated the examination subject with a specific light,
a recording means which receives the examination subject irradiated with light by the irradiation means, a recording timing control means which controls the timing of recording by the recording means, and a quality judging means which judges the quality of the examination subject from a photograph obtained by the recording means; Cross-section orthogonal to its axis of rotation has a non-circular contour and in the course of rotation of the winding core on the winding core varies the distance from the outer peripheral surface of the winding core to the receiving means, wherein the recording timing means according to the rotation angle of the winding core controls the time of recording by the receiving means such that the recording is performed when the recording means focuses the examination subject.

The "winding on the winding core" refers to a close adhesion to the underlying outer peripheral surface of the winding core or layer without a projection of this.

According to the means 1, with the electrode sheets wound on the winding core and the release liner as the examination subject, a photograph of the examination subject is made by the photographing means, and on the basis of the photograph thus obtained, the quality judging means judges the quality of the examination subject. That is, the quality judging means performs a quality judgment on the actually wound examination subject. The quality assessment may refer to other issues, such as whether there is a winding deviation of the layers, or to the position where the electrode layers are coated with active material (active material coating portions), or the position of tabs are provided on the electrode layers. Since the quality evaluation is made on the actual wound examination object, the quality of the coil element can be judged more precisely.

According to the means 1, the winding core has a non-circular contour at a cross section orthogonal to its rotation axis, so that the distance from the outer peripheral surface of the winding core to the receiving means (hereinafter also referred to as "distance between both") corresponding to the rotation angle of the winding core varied. Taking advantage of this fact, the recording timing control means controls the timing of the pickup by the pickup means in accordance with the rotation angle of the reel such that the pickup occurs when the pickup means focuses the subject. For example, in the course of winding the layers, the layers wound on the winding core become thicker (the take-up amount of the layers increases), the recording time control means makes the recording when the rotation angle of the winding core reaches a certain angle and the distance between them is comparatively large. For example, once winding of the layers has just begun and the thickness of the layers wound on the winding core is small, the recording timing control means makes the recording when the rotation angle of the winding core reaches a certain angle and the distance between them is comparatively small. Thus, the examination object can be focused more reliably while reducing the depth of the image and increasing the measurement resolution. Thus, although increasing the measurement resolution and increasing the depth of the image (broadening of the focus range) are in conflict with each other, an effect may be obtained as it would result in simultaneously achieving both. Therefore, the reliability of the investigation can be sufficiently increased.

Means 2

An examination device of the means 1, characterized in that the receiving means comprises a specific lens and is configured such that it is movable along a light axis of the lens relative to the winding core.

Even if the winding element is large and the variation of the diameter of the wound layers between the start of winding and the end of winding is comparatively large, according to the means 2 by moving the receiving means relative to the winding core a more precise focusing of the test object forming layers is possible. Therefore, winding elements of different sizes can be examined with high accuracy.

Mean 3

An examination device of the means 1 or 2, characterized in that the separating layer is transparent or semitransparent and the receiving means is configured such that it receives at least one of the two electrode layers through the separating layer, whereby the two Electrode layers and the release liner are recorded at once.

According to the means 3, the two electrode layers and the separating layer can be recorded at once. Therefore, with a few recordings, the images needed for the examination can be obtained, whereby the examination efficiency can be increased.

Means 4

An examination device of one of the means 1 to 3, characterized in that it is operable in a teach-in mode to detect in advance the time of recording by the recording means, wherein the recording means in the teach-in mode in a state in which the layers on the winding core are wound, taken a series shot of the examination object and determined from the several shots obtained by the series shooting, those in which the receiving means focuses the examination subject, and the rotation angle of the winding core is detected at the time at which the images with focus wherein the recording timing control means controls the timing of the recording by the recording means on the basis of the rotation angle of the winding core obtained in the learning mode in advance.

According to the means 4, the timing of shooting is controlled on the basis of a rotation angle of the winding core obtained in actual winding of the layers at which focusing has taken place. Therefore, the recording timing can be appropriately controlled in consideration of the change in shape of the winding positions of the layers over time as well as factors such as hardness, thickness, etc. of the layers. In this way, images with focus can be obtained more reliably, whereby the reliability of the investigation can be further increased.

Mean 5

An examination device of the means 4, characterized in that in the learning mode on the basis of the brightness of the images those of the several images are determined, in which the recording means focuses the examination subject.

A comparison of images with focus and without focusing of the recording means shows a difference in brightness. For example, when shooting with focus, the brightness is greater, or changes in brightness are more abrupt.

Taking advantage of this fact, according to the means 5, on the basis of the brightness of the images, those images in which there is a focus are determined. This makes it easier to find shots with focus. This will make it easier and more reliable to get the right time to shoot.

Means 6

A winding device, characterized in that it comprises an inspection device according to one of means 1 to means 5.

According to the means 6, substantially the same effects as the above-mentioned means 1, etc. can be obtained.

list of figures

• 1 eine perspektivische schematische Ansicht des Aufbaus eines Batterieelements;
• 2 eine schematische Draufsicht des Aufbaus des Batterieelements;
• 3 eine vereinfachte Konstruktionsansicht einer Wickelvorrichtung;
• 4 eine vereinfachte Konstruktionsansicht eines Wickelabschnitts;
• 5 ein Blockdiagramm, das die elektrische Konfigurierung einer Kamera usw. darstellt;
• 6 ein Ablaufdiagramm von Aufwickelschritten;
• 7 ein Ablaufdiagramm einer Verarbeitung in einem Einlernmodus;
• 8 ein Ablaufdiagramm einer Untersuchungsverarbeitung;
• 9 ein Ablaufdiagramm einer Verarbeitung in einem Aufwickelmodus;
• 10 eine schematische Ansicht eines Winkels des Wickelkerns usw., wenn unmittelbar nach Aufwickelbeginn der Lagen eine Aufnahme mit Fokussierung erlangt wird;
• 11 eine schematische Ansicht eines Winkels des Wickelkerns usw., wenn unmittelbar vor Aufwickelende der Lagen eine Aufnahme mit Fokussierung erlangt wird;
• 12 eine schematische Ansicht einer Aufnahme, die durch eine Kamera erlangt wird;
• 13 eine vereinfachte Konstruktionsansicht des Wickelabschnitts zu Beginn des Aufwickelns; und
• 14 eine vereinfachte Konstruktionsansicht des Wickelabschnitts beim Abschneiden der Trennlage.

Show it:

• 1 a perspective schematic view of the structure of a battery element;
• 2 a schematic plan view of the structure of the battery element;
• 3 a simplified construction view of a winding device;
• 4 a simplified construction view of a winding section;
• 5 a block diagram illustrating the electrical configuration of a camera, etc.;
• 6 a flow chart of Aufwickelschritten;
• 7 a flowchart of processing in a learning mode;
• 8th a flowchart of an examination processing;
• 9 a flowchart of processing in a Aufwickelmodus;
• 10 a schematic view of an angle of the winding core, etc., when immediately after Aufwickelbeginn the layers a shot with focus is obtained;
• 11 a schematic view of an angle of the winding core, etc., when immediately before winding the layers a shot with focus is obtained;
• 12 a schematic view of a shot, which is obtained by a camera;
• 13 a simplified construction view of the winding portion at the beginning of winding; and
• 14 a simplified construction view of the winding section when cutting the release liner.

Embodiment of the invention

An embodiment will be described below with reference to the figures. First, the structure of a lithium-ion battery element will be described as the winding element obtained by the winding device.

As in 1 and 2 shown is the lithium-ion battery element 1 (hereinafter referred to as "battery element 1") prepared by a cathode layer 4 and an anode layer 5 in one with two separators 2 . 3 be wrapped between themselves superimposed state. The following are the separating layers 2 . 3 and the electrode layers 4 . 5 together also referred to as "layers 2-5".

The separating layers 2 . 3 are each band-shaped and of equal width and are formed of an insulating material such as polypropylene (PP) or the like, to prevent the different electrode layers 4 . 5 touch each other and cause a short circuit. The separating layers 2 . 3 are transparent or semitransparent. Therefore, the cathode layer 4 or the anode layer 5 through the separating layers 2 . 3 recognizable.

At the electrode layers 4 . 5 These are thin metal layers whose front and rear surfaces are coated with an active material. As the cathode layer 4, for example, an aluminum foil is used whose front and rear surfaces are coated with an active cathode material (for example, lithium manganese oxide particles or the like). As the anode layer 5 For example, a copper foil is used whose front and rear surfaces are coated with an active anode material (eg, activated carbon or the like).

At the electrode layers 4 . 5 These are electrode layers which have been subjected to a continuous coating, and a specific part in the sheet width direction is an active material coated area 4a . 5a (dotted lines in 2 while all else is an area not coated with active material 4b . 5b is. Over the areas coated with active material 4a 5a is an ion exchange between the cathode layer 4 and the anode layer 5 possible. More specifically, when charging, ions migrate from the cathode layer 4 to the anode layer 5 while the ions discharge from the anode layer 5 to the cathode layer 4 hike.

In addition, the anode layer 5 less wide than the separating layers 2 . 3 , and the cathode layer 4 is less wide than the anode layer 5 , On the battery element 1 is the cathode layer 4 from the anode layer 5 covered. Error related to the fact that the cathode layer 4 not from the anode layer 5 is covered (for example, because needle-shaped precipitates on the cathode layer 4 have formed and the separating layers 2 , 3 were damaged, etc.) are thereby prevented, thereby increasing the quality of the battery element 1 is reached.

In addition, they extend from an end edge of the cathode layer 4 in the width direction a plurality of cathode conductor tracks (not shown), and from the other end edge of the anode layer 5 in the width direction, a plurality of anode conductor tracks (not shown) extend.

When generating a lithium-ion battery, the battery element 1 in a cylindrical battery receiving container (housing) made of metal (not shown), and the cathode conductor tracks and anode conductor tracks are each combined. The gathered cathode traces are connected to a cathode contact piece (not shown) and also the consolidated anode traces are connected to an anode contact piece (not shown) and the two contact pieces are arranged to close the two end openings of the battery container, thus exposing the lithium ions Battery is completed.

Next will be a winding device 10 for producing the battery element 1 described. As in 3 shown, the winding device 10 a winding section 11 for winding up the layers 2 - 5 , a cathode sheet feeding mechanism 31 for feeding the cathode layer 4 to the winding section 11 , an anode sheet feeding mechanism 41 for feeding the anode layer 5 to the winding section 11 , Separator feed mechanisms 51 . 61 for respectively supplying the release liners 2 . 3 to the winding section 11 and a control device 81 serving as a quality judging means and recording time control means. The various devices in the winding device 10 like the winding section 11 and the feeding mechanisms 31 , 41, 51, 61, are from the controller 81 controlled.

The cathode sheet feeding mechanism 31 has a cathode roll 32 on, on the cathode layer 4 rolled up in a roll shape. The cathode layer roll 32 is supported by a support shaft 33 mounted, which by a drive means (not shown) is rotatable. Along with the rotation of the bearing shaft 33 becomes the cathode layer 4 from the cathode roll 32 settled.

In addition, the Kathodenlagenzuführmechanismus 31 a ply insertion mechanism 71 , a layer cutting knife 72 , a tensioning mechanism 73 and a buffer mechanism 75 on.

The ply insertion mechanism 71 serves to the cathode layer 4 the winding section 11 and is designed such that it along the transport path of the cathode layer 4 between an approach position in which it is to the take-up section 11 is approximated, and a distance position in which he from the winding section 11 is spaced, can be moved. The ply insertion mechanism 71 has a pair of jaws 71a . 71b on, the cathode layer 4 can hold. The jaws 71a . 71b are designed so that they can be opened and closed by an actuating means (not shown). When the cathode layer 4 the winding section 11 is fed, the cathode layer 4 from the jaws 71a . 71b held, and the layer insertion mechanism 71 goes to the take-up section 11 approximated.

The layer cutting knife 72 serves to cut through the cathode layer 4 and has a pair of blade sections 72a . 72b on, respectively on the top and the bottom of the cathode layer 4 are arranged. The layer cutting knife 72 is configured such that it is between a ply cutting position in which the pair of blade sections 72a . 72b the cathode layer 4 receives between them, and can move a reverse position in which they from the transport path of the cathode layer 4 have moved back.

The cutting of the cathode layer 4 takes place in a state in which the cathode layer 4 from the jaws 71a . 71b is held. When the ply insertion mechanism 71 for feeding the cathode layer 4 to the winding section 11 the winding section 11 approaches, the pair moves away blade sections 72a . 72b from the transport path of the cathode layer 4 so that it is the movement of the layer insertion mechanism 71 not disabled.

The clamping mechanism 73 has a pair of rollers 73a . 73b and one free between the two rollers 73a . 73b reciprocally arranged dancer roller 73c. The dancer roller 73c is driven by a motor (not shown) at a certain constant torque and is designed to be the cathode layer 4 always stops at a certain web tension. By tensioning the cathode layer 4 becomes sagging of the cathode layer 4 prevented.

The buffer mechanism 75 serves the purpose of the cathode roll 32 unrolled cathode layer 4 temporarily record. The buffer mechanism 75 has a pair of trailing rollers 75a . 75b and one between the two rollers 75a . 75b vertically displaceable lifting roller 75c on. The vertical position of the lifting roller 75c changes along with the intake amount of the cathode layer 4 ,

The anode sheet feeding mechanism 41 has an anode layer roll at its furthest upstream side 42 on, on which the anode layer 5 is wound up in a roll shape. The anode layer roll 42 is from a bearing wave 43 mounted, which by a drive means (not shown) is rotatable. Along with the rotation of the bearing shaft 43 becomes the anode layer 5 from the anode sheet roll 42 settled.

In addition, the anode sheet feeding mechanism has 41 as well as the cathode pad feed mechanism 31 a ply insertion mechanism 71 , a layer cutting knife 72 , a clamping mechanism 73 and a buffer mechanism 75 on. Except that these elements are for the anode layer 5 are provided, they correspond to the Kathodenlagenzuführmechanismus 31 provided elements. Therefore, their detailed description is omitted.

The separation sheet feeding mechanisms 51 . 61 In turn, separating layer rollers 52, 62 have, on each of the separating layers 2 . 3 are wound up in a roll shape. The separator rolls 52 . 62 are freely rotatably mounted, and the separating layers 2 . 3 will be rolled off as needed.

In addition, the Trennlagenzuführmechanismen 51 . 61 as well as the electrode position delivery mechanisms 31 . 41 a clamping mechanism 73 on. Except that this clamping mechanism 73 for the separating layers 2 . 3 is provided, it corresponds to that at the Kathodenlagenzuführmechanismus 31 provided mechanism. Therefore, its detailed description is omitted.

At the transport route of the locations 2 - 5 is also a pair of pressure rollers 78a , 78b. The pressure rollers 78a . 78b serve the layers 2 - 5 in a superimposed state to keep the layers 2 - 5 be transported on the same transport route. The means of the pressure rollers 78a . 78b superimposed layers 2 - 5 are supplied to the take-up section 11 in this state.

A rotation amount of the pressure rollers 78a . 78b (In the present embodiment, the rotation amount of the pressure roller 78b ) can be determined by a Andruckwalzendrehgeber (not shown). Information about the amount of rotation of the pressure roller 78b be of the Andruckwalzendrehgeber in the controller 81 fed. The amount of rotation of the pressure roller 78b corresponds to the transport quantity of the layers 2 - 5 ,

Next, the construction of the take-up section will be described 11 described. As in 4 shown, the take-up section 11 a spool wheel 12 formed by two means of a drive mechanism (not shown) rotatably provided, opposite, round disk-shaped plates, two hubs 13 . 14 in the direction of rotation of the spool wheel 12 are provided at a distance of 180 °, clamping sections 15a . 15b , a separator knife 16 , a pressure roller 17 , which prevents the layers after winding up 2 - 5 detach from each other, and a tape sticking mechanism 18 for gluing a certain fixation tape on.

The layers 2 - 5 be on the outer peripheral side of the hubs 13 . 14 wound, and these are designed by a drive mechanism (not shown) about its central axis as a rotation axis rotatable. The amount of rotation of the hubs 13, 14 can be determined by a winding core encoder (not shown), and information about the amount of rotation of the hubs 13 . 14 are from the winding core encoder in the control device 81 fed.

The hubs 13 . 14 are in the axial direction of the spool wheel 12 (in 4 etc. in the depth direction of the paper) with respect to the plates containing the spool wheel 12 form, provided retractable. If the hubs 13 . 14 from one of the plates, their leading end portion enters a receiving hole formed on the other plate, and they are supported by the two plates in a rotatable state.

In addition, the hubs are 13 . 14 configured such that they have a non-circular contour at a cross section orthogonal to their respective axis of rotation. In the present embodiment, the winding cores 13 . 14 at the cross section orthogonal to its axis of rotation on an oval shape. In the present embodiment, therefore, changes in the course of rotation of the winding core 13 . 14 a distance from the outer peripheral surface of the winding core 13 . 14 to a camera described later 20 , In the course of the rotation of the winding core 13 . 14 Therefore, the distance of the change on the winding core 13 . 14 wound up layers 2 - 5 from the camera 20 ,

In addition, the hubs have 13 ( 14 ) one pair of core pieces each 13a , 13b ( 14a . 14b ), which extend in their axial direction (in 4 in the depth direction of the paper). Between the core pieces 13a . 13b ( 14a . 14b ) is a room 13c ( 14c ) educated.

The hubs 13 . 14 are configured such that they rotate by turning the spool wheel 12 between a winding position P1 and a removal position P2 are rotatable.

The winding position P1 is a position in which the layers 2 - 5 from the hubs 13 . 14 be wound up. In the winding position P1, the layers become 2 - 5 from the feeding mechanisms 31 . 41 . 51 , 61 supplied.

In the removal position P2 is a position in which the layers 2-5, so the battery element 1 to be taken after winding. In the vicinity of the removal position P2 is a removal device (not shown) or the like for removing the battery element 1 from the winding cores 13 . 14 intended.

The clamping sections 15a . 15b serve to the separating layers 2 . 3 between the winding position P1 and the removal position P2. The clamping sections 15a . 15b are configured such that they by a drive means (not shown) about an axis of rotation parallel to the axis of rotation of the spool wheel 12 or the hubs 13 . 14 are rotatable. The clamping sections 15a . 15b can each be moved between a stop position and a return position. Be the clamping sections 15a . 15b moved into the holding position, the clamping sections 15a . 15b the separating layers 2 . 3 hold, which extend from the pressure rollers 78a, 78b to the removal position P2 (see 13 ). Be the clamping sections 15a . 15b On the other hand, when moved to the return position, they are positioned to control the movement of the hubs 13 . 14 and the separator layers 2 . 3 and the like does not hinder (see 3 ).

The separator knife 16 is disposed between the take-up position P1 and the take-off position P2, and closer to the take-out position P2 than the chucking portions 15a . 15b intended. The separator knife 16 is reciprocable between a certain upper position and lower position in the vertical direction and cuts through the separating layers 2 . 3 by moving from the upper position to the lower position.

The pressure roller 17 is disposed in the vicinity of the picking position P2 and is configured such that it is between an approach position in which it to the spool 12 is approximated and the layers 2 - 5 presses, and a reversing position moves in which they are from the spool wheel 12 is removed and the movement of the hubs 13 . 14 not disabled.

The tape pasting mechanism 18 is disposed in the vicinity of the picking position P2 and, after the end of the winding, adheres a fixing adhesive tape to the end portions of the separating sheets 2 . 3 , With the sticking of the fixing adhesive tape, the winding up of the battery element ends 1 ,

In addition, the take-up section 11 lighting devices 19a , 19b as an irradiation agent and a camera 20 as recording means. The lighting devices 19a . 19b and the camera 20 are respectively arranged according to the winding position P1.

The lighting devices 19a . 19b Irradiate a spot of the object to be examined forming and the winding core 13 . 14 in the winding position P1 wound layers 2 - 5 having at least one end edge in the width direction, with a certain light (for example, visible light or infrared light or the like). The lighting devices 19a . 19b emit the light to at least one position, that of the axis of rotation of the winding core 13 . 14 less than the minor axis of the winding core 13 . 14 is offset. While the layers 2 - 5 from the hub 13 . 14 can be wound up, the layers 2 - 5 be illuminated in this way always.

The camera 20 has sensitivity to the wavelength range of the illumination devices 19a . 19b radiated light and serves to at least that of the lighting devices 19a . 19b illuminated layers 2 - 5 (Examination object).

In the present embodiment, the lighting devices are 19a , 19b and the camera 20 provided in two groups, one group in the width direction of the layers 2 - 5 is provided at one end edge and the other group in the width direction of the layers 2 - 5 is provided at the other end edge.

In the recording area of the camera 20 lies the cathode layer 4 on the outside circumference, including the separator 3 , including the anode layer 5 and underneath the separator 2. Therefore, the camera takes 20 at least the cathode layer 4 , the separator 3 passing through the separator 3 through visible anode layer 5 and the separator 2 at once.

The camera 20 shows how 5 shown a lens 21 , a receptacle 22 , a trigger signal output section 23 , a recording memory 24 , a focusing section 25 , a calculation section 26 and an output section 27 on.

The objective 21 takes from the through the lighting devices 19a , 19b radiated light from the layers 2 - 5 Reflects light and focuses it into a picture for the recording element 22 , At the lens 21 it can be an ordinary lens or a telecentric lens.

The receiving element 22 serves to light through the lens 21 is converted into an electrical signal, and is formed by, for example, a CMOS image sensor or a CCD image sensor.

The trigger signal output section 23 gives a trigger signal to the receiving element 22 out. Each time a trigger signal is output, the recording element becomes 22 exposed, and a recording of the layers 2 - 5 (Recording data) is from the recording element 22 to the recording memory 24 output. In the obtained image are at least the cathode layer 4 , the separator 3 passing through the separator 3 absorbed anode layer 5 and the separator 2 included (see 12 ). Because the edge sections 2E . 3E (End edges in the width direction) of the release liners 2 . 3 However, always over each other, it happens that the separation layer 2 not visible in the picture. The present embodiment is designed such that the imaging depth of the camera 20 is comparatively low, which is why the resolution of the acquired recording, so the measurement resolution, is relatively high.

In addition, a teaching mode signal or recording execution signal described later will be provided by the controller 81 into the camera 20 is input, and when the teaching mode signal is inputted, the trigger signal output section 23 at certain short intervals, a trigger signal is repeated until a learn mode completion signal described later is input. This will perform a continuous shooting, and to the recording memory 24 be several shots from the recording element 22 output. Will turn the recording execution signal into the camera 20 inputted, the trigger signal output section 23 a trigger signal off. As a result, only one recording takes place, and the receiving element 22 will take a picture to the recording memory 24 output.

The recording memory 24 saves from the receiving element 22 entered recordings. In addition, in the recording memory 24 Numbers indicating the recording order are stored in connection with the recordings. The calculation section 26 performs processing for the numbers indicating the recording order.

The focusing section 25 is only upon input of a Einlemmodussignals by the controller 81 activated. The focusing section 25 determines among the several shots obtained by the series recording those in which the layers 2 - 5 are focused. More specifically, the focusing section calculates 25 when winding up the layers 2 - 5 based on several shots taken during one revolution of the winding core 13 . 14 be obtained, a value based on the brightness values of the individual images. The recording whose calculated value is the largest is determined as a recording with focus. This is based on the fact that when shooting with focus basically the brightness value of each pixel is higher.

If there are several recordings where the calculated value is greatest, one of them will be taken as a shot with focus. As a result, the focusing section detects 25 for each revolution of the winding core 13 . 14 one shot each with focus. The value based on the brightness values may, for example, be an average value of the brightness value of a plurality of pixels that make up a picture or a difference of the brightness values between certain adjacent pixels.

When a teach-in mode signal from the controller 81 is entered and recordings in the recording memory 24 are stored, the calculation section leads 26 processing to relate the recordings to the numbers indicating the recording order of the recordings. At the calculation section 26 a counter for detecting the recording order is provided, and the value of this counter becomes the trigger signal output section with each output of a trigger signal 23 increased by one. Upon entering a teach-in mode completion signal, the counter value is initialized.

When a teach-in mode signal from the controller 81 is entered, the calculation section sends 26 that of the focusing section 25 determined shot with focus and the number indicating the recording order of the shot, from the recording memory 24 to the output section 27 , In contrast, when a recording execution signal from the controller 81 is entered, the calculation section sends 26 in the recording memory 24 stored recordings to the output section 27 ,

The output section 27 is used to display the recordings and the numbers that indicate the recording order of the recordings, or just the recordings to the controller 81 to send. In the present embodiment, the number of shots that the output section 27 to the controller 81 sends, equal to or less than the number of revolutions of the winding core 13 . 14 when winding up the layers 2 - 5 , As the output section 27 or transmission path, the output section 27 and the controller 81 Therefore, there is no need to use a particularly powerful one in terms of processing power or transmission performance. Thus, the pictures can be taken from the output section using a usual transmission system (for example, a conventional picture transmission technique) 27 to the controller 81 be sent.

Next, the controller 81 to be discribed. The control device 81 has a CPU serving as a calculating means, a ROM for storing various programs, a RAM for temporarily storing various data such as calculation data, input-output data and the like, and a hard disk for storing calculation data in the long term and the like. The control device 81 controls the various devices of the winding device as described above 10 such as the winding section 11 and the feeding mechanisms 31, 41, 51, 61 and the like.

In addition, the control device 81 configured such that it the operating mode of the winding device 10 switch to teach-in mode or rewind mode. The teach-in mode is a mode of operation whose aim is during the manufacture of a battery element 1 the recording times of the camera 20 for the winding-up mode. The winding mode is an operation for producing a battery element 1 using the acquisition times obtained in teach-in mode. Regardless of which of these modes the controller 81 the winding device 10 It conducts an investigation with respect to positional deviations etc. of the layers 2 - 5 on the basis of the camera 20 transmitted recordings. The concrete procedure for the investigation will be described later.

Whether the operating mode of the winding device 10 is set to the teaching mode or the winding-up mode is determined by an input to the controller 81 through a specific input device (not shown). The input content is on the hard disk of the controller 81 or the like stored.

When the winding device 10 is operated in teach-in mode, the operation of the control device 81 as follows. If a winding process of the layers 2 - 5 starts, gives the controller 81 a teach-in mode signal to the camera 20 out.

Connected to the output of the teach-in mode signal are the pictures taken by the camera 20 and the numbers indicating the recording order of these recordings are successively input to the controller 81 entered. The pictures you have taken are focused. The control device 81 Examines position deviations etc. of the layers based on the entered images 2 - 5 , On the basis of the entered numbers, which indicate the recording sequence, also an angle of rotation sum of the winding core 13 . 14 at the time of execution of the recordings corresponding to the respective number. This is done, for example, by means of a pre-set table representing the relationship between the numbers indicating the picking order and the rotation angle sums. Then stores the controller 81 the obtained angle of rotation sum as a recording execution angle on the hard disk or the like. As a result, a number of recording execution angles corresponding to the number of recorded images are stored.

When the winding device 10 is operated in the winding mode, the operation of the control device 81 as follows. If a winding process of the layers 2 - 5 starts, gives the controller 81 always a Aufnahmeausführungssignal, if the rotation angle sum of the winding core 13 . 14 from the beginning of the winding process corresponds to the recording execution angle obtained in teach-in mode. This will take the camera 20 the layers 2 - 5 then open when they are in the focus area. The camera 20 gives the pictures with focus one after the other in the control device 81 one. The control device 81 Examines position deviations etc. of the layers based on the entered images 2 - 5 ,

In the present embodiment, the camera form 20 and the controller 81 an examination device 100 for examining the battery element 1 ,

Next, the winding process of the layers 2 - 5 by the winding device described above 10 described. Before each winding process, the separating layers are first 2 . 3 in the room 13c ( 14c ) of a winding core 13 ( 14 ), and the separator layers 2 . 3 be from the chucking sections 15a . 15b held (see 13 ).

During the winding process, as in 6 shown in step S11 first of a winding core 13 ( 14 ) rotated by a certain number, so that the one winding core 13 ( 14 ) a certain amount of release liners 2 . 3 winds. Subsequently, the clamping sections 15a . 15b moved to its return position.

Next, in step S12, the ply insertion mechanism 71 the anode sheet feeding mechanism 41 on the side of the one winding core 13 ( 14 ) the anode layer 5 fed. More specifically, the ply insertion mechanism is approaching 71 who the anode situation 5 holds, the side of the winding section 11 on, and the anode layer 5 is supplied by the anode layer 5 between the separating layers 2 . 3 to be led. After insertion, the ply insertion mechanism gives 71 the anode layer 5 free, and the ply insertion mechanism 71 returns to its original position.

In the next step S13 after feeding the anode layer 5 gets on a step after having a winding core 13 ( 14 ) was rotated by a certain number (for example, one revolution), the cathode layer 4 by the ply insertion mechanism 71 on the side of the one winding core 13 ( 14 ). More specifically, the ply insertion mechanism is approaching 71 who has the cathode layer 4 holds, the side of the winding section 11 on, and the cathode layer 4 is fed by the cathode layer 4 between the separating layers 2 . 3 to be led. After insertion, the ply insertion mechanism gives 71 the cathode layer 4 free, and the ply insertion mechanism 71 returns to its original position.

Next, in step S14, the content of an input to the controller becomes 81 judges whether the selected operating mode is the teach-in mode. If the selected operation mode is the teach-in mode (step S14: Yes), a transition is made to step S15, and learning mode processing is executed to operate the winding device 10 in the teach-in mode.

In teach-in mode processing, as in 7 shown, first in step S31, a control to the one winding core 13 ( 14 ) with a certain speed to rotate and the layers 2 - 5 wind. The speed of the winding core 13 , 14 when winding up the layers 2 - 5 is identical in teach-in mode and in rewind mode.

Next, in step S32, a teaching mode signal is sent to the camera 20 output. Because of this, the camera leads 20 a series shot of the wound layers 2 - 5 by. Then the camera gives 20 the shots taken by the focusing section 25 were detected as shots with focus, and the numbers indicating the recording order of the shots in the control device 81 one.

Next, in step S33, it is judged whether a transport amount of the cathode sheet 4 has reached a certain preset value. That is, it is judged whether a condition for terminating the teach-in mode processing satisfies is. As a transport amount of the cathode layer 4 can be a transport amount of the layers 2 - 5 can be used from the start of winding, which is obtained by Andruckwalzendrehgeber. The determined amount corresponds to a length of the cathode layer 4 that is a single battery element 1 accounts. If the specific amount of cathode layer 4 to the winding core 13 . 14 was transported, there is a state in which an end portion of the cathode layer 4 for an element in relation to the layer cutting knife 72 is positioned.

If a negative judgment is made in step S33, a flow goes to step S34. In step S34, it is judged whether photographs etc. are taken from the camera 20 were entered. If a negative judgment is made in step S34, the process returns to step S33. On the other hand, if a positive judgment is made in step S34, a flow goes to step S35, and an examination processing is executed.

In the examination processing, first, as in 8th 2, an edge portion is displayed at step S101 based on the input images 3E (End edge portion in the width direction) of the release liner 3 , an edge portion 2E the separation layer 2 , an edge portion 4E the cathode layer 4 and an edge portion 5E the anode layer 5 extracted (see 12 ). When the edge sections 2E . 3E overlay each other and the edge section 2E can not be extracted, the edge section 3E as the edge portion 2E treated.

In the next step S102, based on the input images, a boundary portion is formed 4T between the active material coated area 4a and the non-active material coated area 4b the cathode layer 4 and a boundary section 5T between the active material coated area 5a and the non-active material coated area 5b the anode layer 5 extracted (see 12 ).

Next, in step S103, based on the edge portions extracted in step S101, FIG. 102 2E . 3E . 4E . 5E and border sections 4T . 5T respective distance calculations performed. That is, it becomes a positional deviation calculation on the one winding core 13 ( 14 ) wound layers 2 - 5 carried out.

Become more specific based on the edge section 3E a distance L1 in the ply width direction to the boundary portion 4T , a distance L2 in the ply width direction to the edge portion 4E , a distance L3 in the ply width direction to the boundary portion 5T , a distance L4 in the ply width direction to the edge portion 5E and a distance (not shown) in the ply width direction to the edge portion 2E calculated (see 12 ).

Subsequently, in step S104, it is judged whether the distances are within a predetermined allowable range based on the distances calculated in step S103.

If it is judged that one of the distances is not within the allowable range, that is, assuming that a winding deviation of the layers 2 - 5 or a coating position deviation of the active material coated regions 4a . 5a has taken place, the judgment "deficient" is made in step S105, and the examination processing ends.

On the other hand, when it is judged in step S104 that all distances are within the allowable range, the judgment "OK" is made in step S106, and the examination processing ends.

Returning to 7 after execution of the examination processing, a transition is made to step S36, and it is judged whether the judgment in the immediately preceding examination processing was "OK". If a negative judgment is made in step S36 and the judgment in the inspection processing is "deficient," a transition is made to step S37, and the layers are wound up 2 - 5 is stopped by stopping the rotation of the winding core 13 . 14 interrupted. If the processing of a step S39 described later has already been performed and the recording execution angles have been stored on the hard disk, the stored recording execution angles are discarded. In addition, in step S38, the currently wound battery element 1 is judged as a defective product, and it goes to step S42.

On the other hand, when a positive judgment is made in step S36 and the judgment in the inspection processing is "okay", a flow goes to step S39, and from the number indicating the picking order, a rotation angle sum of the winding core becomes 13 . 14 at the time of execution of the recordings corresponding to the respective number. Then, the obtained rotation angle sum is stored as a recording execution angle on the hard disk or the like.

After step S39, return to step S33. This way, during teach-in mode processing, each time you take shots, etc., the camera will do so 20 the processing of steps S35, S39 is repeated until a certain amount of the cathode layer 4 was transported, as long as the assessment at the examination processing is not Is "deficient". As a result, a plurality of recording execution angles are obtained, and the plural acquired recording execution angles are stored on the hard disk or the like. In addition, an examination processing is carried out on several images with focus.

When the storage of the take-up performing angles and the inspection processing were performed without any problems and a certain amount of the cathode layer 4 is transported (step S33: Yes), in step S40, the rotation of the one winding core 13 . 14 stopped. Next, in step S41, the currently wound battery element 1 from the layers 2 - 5 is judged to be a flawless product, and it goes to step S42.

In step S42, a teach-in mode completion signal is sent to the camera 20 and the teach-in mode processing ends. Through the processing of step S42, the output of trigger signals by the trigger signal output section 23 interrupted.

Returning to 6 if a negative judgment is made in step S14, a flow goes to step S16, and based on the content of the input to the control means 81 It is judged whether the operation mode is the winding mode. If a negative judgment is made in step S16 and the operation mode is not selected, an error processing is executed in step S19, and the winding operation ends. In the error processing, for example, processing is performed to notify an operator, etc. that the operation mode has not been selected or no pickup execution angles have been stored.

On the other hand, if an affirmative judgment is made in step S16, a transition is made to step S17, and it is judged whether recording execution angles have already been stored, that is, whether information on the recording execution timings has been stored in the winding-up mode. If a negative judgment is made in step S17, an error processing is executed in step S19, and the winding operation ends.

On the other hand, if a positive judgment is made in step S17, a transition to step S18 is made, and a take-up mode processing is performed to drive the winding apparatus 10 to operate in the winding mode.

In the winding mode processing, as in 9 shown, first in step S51, a control to the one winding core 13 ( 14 ) with a certain speed to rotate and the layers 2 - 5 wind.

Next, in step S52, it is judged whether a transport amount of the cathode layer 4 has reached a certain preset value. That is, it is judged whether a condition to terminate the winding mode processing is satisfied.

If a negative judgment is made in step S52, it is judged in step S53 whether the rotation angle sum of the one winding core 13 ( 14 ) from the beginning of winding the layers 2 - 5 has reached one of the pre-stored multiple Aufnahmeauseausführungswinkel. Taking into consideration a delay in subsequent processing, it can be judged whether the rotation angle sum of one winding core 13 ( 14 ) has reached a value at which a certain value has been subtracted from the take-up execution angle.

If a negative judgment is made in step S53, the process returns to step S52. On the other hand, if a positive judgment is made in step S53, a pick-up execution signal is sent to the camera in step S54 20 output. This will take the camera 20 , as in 10 and 11 shown, the layers 2-5, when they are in the focusing area R. For example, as in 10 shown immediately after winding start of the layers 2 - 5 the distance of the outer peripheral surface of a winding core 13 ( 14 ) to the camera 20 is relatively small, so are the layers 2 - 5 in a focusing area R of the camera 20 , This is therefore a recording time at which a recording by the camera 20 is carried out. If, for example, as in 11 shown, immediately before winding the layers 2 - 5 the distance of the outer peripheral surface of a winding core 13 ( 14 ) to the camera 20 is relatively large, so are the layers 2 - 5 in the focusing area R of the camera 20 , This is therefore a recording time at which a recording by the camera 20 is carried out.

Returning to 9 After step S54, in step S55, it is judged whether a transport amount of the cathode layer 4 has reached a certain preset value. This judgment is made to terminate the winding mode processing when a certain amount of the cathode layer 4 was wound up before by the camera 20 a recording is sent. If a positive judgment is made in step S55, a flow goes to step S61.

On the other hand, if a negative judgment is made in step S55, it is judged whether the camera is in step S56 20 a recording has been entered. If in step S56 a negative Judgment takes place, a return to step S55. On the other hand, if a positive judgment is made in step S56, a flow goes to step S57, and the above-described examination processing is executed.

After execution of the examination processing, a transition is made to step S58, and it is judged whether the judgment in the immediately preceding examination processing was "OK". If a negative judgment is made in step S58 and the judgment in the inspection processing is "deficient," a transition to step S59, and the winding of the sheets are made 2 - 5 is interrupted by stopping the rotation of the winding core 13, 14. In addition, in step S60, the currently wound battery element 1 from the layers 2 - 5 judged as a defective product, and the winding mode processing ends.

On the other hand, if a positive judgment is made in step S58, the process returns to step S52. As a result, in the winding-up mode processing, the processing of step S57 is repeated until a certain amount of the cathode layer 4 as long as the assessment during the processing of the investigation is not "defective". In this way, an examination processing is performed on a plurality of shots with focus.

If the inspection processing has been carried out smoothly and a positive judgment is made in step S52 or step S55, the rotation of the one core is made in step S61 13 . 14 stopped. Then, in step S62, the currently wound battery element 1 from the layers 2 - 5 judged as a perfect product, and the winding mode processing ends.

Returning to 6 After performing the teaching mode processing or the winding mode processing in step S20, the cathode layer becomes 4 from the layer insertion mechanism 71 held, whereupon the cathode layer 4 with the layer cutting knife 72 is cut through. When in the teach-in mode processing or the winding-up mode processing, the currently wound battery element 1 was judged to be a perfect product, the cathode layer 4 for an element at its end section. On the other hand, in the teach-in mode processing or the winding-up mode processing, the currently wound battery element 1 was judged to be defective product, the cathode layer 4 cut through before its end section.

In the next step S21, it is judged whether the judgment in the learning mode processing or the winding-up mode processing was "perfect product". When a positive judgment is made in step S21, the rotation of the one winding core becomes 13 ( 14 ), and a transition is made to step S22.

On the other hand, when a negative judgment is made in step S21, the rotation of one winding core becomes 13 ( 14 ), and a transition to step S23 occurs. That is, when the currently wound battery element 1 was judged to be deficient, no further anode situation 5 fed.

In step S22, the judgment is made as to whether the transport amount of the anode layer 5 from the start of the supply has reached a certain amount, as long as repeated until the condition is met. The determined amount corresponds to a length of the anode layer 5 that is a single battery element 1 accounts. The transport amount of the anode layer 5 can be based on the transport amount of the layers 2 - 5 can be calculated, which is obtained from Andruckwalzendrehgeber. If a positive judgment takes place in step S22, that is, if the end portion of the currently wound anode sheet 5 for one element the layer cutting knife 72 has reached, the rotation of a winding core 13 ( 14 ) is temporarily stopped, and a transition is made to step S23.

In step S23, the anode layer becomes 5 from the layer insertion mechanism 71 held, whereupon the anode layer 5 with the layer cutting knife 72 is cut through.

Next, in step S24, the end portion (unwound portion) of the electrode layers becomes 4 . 5 wound up by the rotation of a winding core 13 ( 14 ) is resumed.

After step S24, in step S25, the spool wheel 12 turned counterclockwise, without the separating layers 2 . 3 to cut. This will be the one winding core 13 ( 14 ), which was in the winding position P1, is moved to the picking position P2 while holding the separating sheets 2 . 3 from the separation sheet feed mechanisms 51 . 61 pulls out. The other hub 14 ( 13 ) located in the picking position P2 is moved to a winding position P1 in a state sunk into the one plate of the spool gear 12.

Then, in step S26, along with the rotation of the spool wheel 12 the one winding core 13 ( 14 ) on which the layers 2 - 5 were wound up.

Then, in the next step S27, a winding completion processing is performed, whereby the winding operation ends.

In the winding completion processing, first, at a point of time detected by the winding core encoder and at which the amount of rotation of the one winding core 13 ( 14 ) from the cutting of the anode layer 5 has reached a certain value, the rotation of a winding core 13 ( 14 ) stopped. Before stopping the rotation of the one winding core 13 ( 14 ), simultaneously or after the stop, the rotation of the spool wheel 12 stopped.

When the rotation of a winding core 13 ( 14 ) and the spool wheel 12 is stopped, there is a hub 13 ( 14 ), which was previously in the winding position P1, in the removal position P2, while the other winding core 14 (FIG. 13 ), which was previously in the picking position P2, is in the winding position P1.

In this state, the pressure roller approaches 17 the one winding core 13 ( 14 ), and the layers 2 - 5 be from the pressure roller 17 pressed. In addition, by the clamping sections 15a . 15b are moved from the return position to the holding position, the separating layers 2 . 3 held between the two positions P1 and P2. Then the separator blade approaches 16 the separating layers 2 . 3 on and cuts through the separator layers 2 . 3 (please refer 14 ).

In addition, by the other winding core 14 ( 13 ) from the one plate of the Spulenrads 12 projects, the separating layers 2 . 3 in the room 14c ( 13c ) of the other hub 14 ( 13 ) arranged. By at the next Aufwickelvorgang the other hub 14 ( 13 ) is rotated by a certain amount, a certain amount of separation layers 2 . 3 wrapped on its outer circumference. Then the electrode layers become 4 . 5 the other hub 14 ( 13 ) supplied to the separating layers 2 . 3 were wound up.

After cutting through the separating layers 2 . 3 is under pressure of the layers 2 - 5 through the pressure roller 17 the one winding core 13 ( 14 ) turned. As a result, the end portions of the separation layers 2 . 3 and the electrode layers 4 . 5 completely wrapped without separating. Subsequently, the end portions of the separating layers 2 . 3 through the tape-gluing mechanism 18 fixed by means of fixing tape, whereby the winding termination processing ends. The finished wound battery element 1 is from the removal device from the one winding core 13 ( 14 ). A battery element judged to be a perfect product 1 is moved to the regular line. A battery element judged to be a defective product 1 is promoted to a specific committee mechanism.

As described in detail above, according to the present embodiment, with those on the hubs 13 . 14 wound electrode layers 4, 5 and separating layers 2 . 3 as the examination object a recording of the examination subject by the camera 20 created, and judges from the thus obtained recording, the controller 81 the quality of the examination object. That is, the controller 81 performs a quality assessment on the actual wound examination object. Since the quality assessment is carried out in this way on the actually wound examination object, the quality of the battery element 1 be judged more precisely.

In addition, the hubs have 13 . 14 at a cross section orthogonal to its axis of rotation a non-circular contour, so that the distance from the outer peripheral surface of the winding core 13 . 14 to the camera 20 according to the angle of rotation of the winding core 13 . 14 varied. Taking advantage of this fact controls the controller 81 the time of taking the camera 20 according to the angle of rotation of the winding core 13 . 14 such that the recording is done when the camera 20 the examination object focused. In the present embodiment, the controller sends 81 a recording execution signal to the camera 20 to take a picture through the camera 20 to create when the rotation angle sum of the winding core 13 . 14 has reached the take-up execution angle. Thus, the examination object can be focused more reliably while reducing the depth of the image and increasing the measurement resolution. Thus, although increasing the measurement resolution and increasing the depth of the image (broadening the focus range) are in a competing proportion, an effect can be obtained as it would result in simultaneously achieving both. Therefore, the reliability of the investigation can be sufficiently increased.

In addition, the electrode layers can 4 . 5 and separating layers 2 . 3 at once from the camera 20 be recorded. Therefore, with a few recordings, the images needed for the examination can be obtained, whereby the examination efficiency can be increased.

In addition, the recording timing is controlled based on recording execution angles that are based on the actual winding of the layers 2 - 5 based. Therefore, the recording timing can be made in consideration of the change in shape of the winding locations of the layers 2 - 5 over time as well as factors such as hardness, thickness, etc. of the layers 2 - 5 be controlled appropriately. In this way Focused images can be acquired more reliably, further enhancing the reliability of the examination.

In addition, when obtaining the frame angles, based on the brightness of the pictures, those pictures in which there is focus are obtained. This makes it easier to find shots with focus. This will make it easier and more reliable to get the right time to shoot.

There is no limitation on the content of the embodiment described above, and, for example, the following embodiment is possible. Of course, other application examples and modification examples are possible as well, which are not listed below.

(a) In the embodiment described above, the winding device 10 operated in teach-in mode and positions 2 - 5 are actually wound up to obtain the take-up angles. However, the recording execution angle can also be calculated based on the shape of the hubs 13 . 14 , the thickness of the layers 2-5, etc. are obtained. That is, the recording time can be without actually winding up the layers 2 - 5 be obtained. The information on the acquired recording times can be entered in advance in the controller 81 can be entered and this can control the recording time based on this information.

(b) In the embodiment described above, a winding deviation of the layers is based on the obtained images 2 - 5 or a coating position deviation of the active material coated regions 4a 5a, but the objective of the study is not limited to this. So if, for example, a mark on the electrode layers 4 . 5 is provided, based on the acquired images, the position of the mark along the width direction of the electrode layers 4 - 5 to be examined. As a marker can be a weld mark, the non-active material coated areas 4b, 5b of the electrode layers 4 . 5 welded, or a cutting mark, which at an end portion of the electrode layers 4 . 5 is cut in intervals in intervals. Of course, other elements can also be examined on the basis of the acquired images. Regardless of the objective of the study, the reliability of the examination can be significantly increased by carrying out the examination on the basis of the images with focus.

(c) Although not specifically stated in the above-described embodiment, the camera may 20 along the light axis direction of the lens 21 in relation to the winding core 13 . 14 be designed movable. By such a configuration, even if the battery element 1 is large and the variation of the diameter of the wound layers 2 - 5 between the beginning of the winding and the end of the winding is comparatively large, by moving the camera 20 relative to the hub 13 . 14 a precise focusing of the examination object forming layers 2 - 5 allows. Therefore, battery elements 1 of different sizes can be examined with high accuracy.

The camera 20 Can also be adapted to the winding of the layers 2 - 5 be moved gradually, and when the winding amount of layers 2 - 5 reaches a certain value, it can be moved to a certain position.

(d) In the embodiment described above, the pictures are taken by the camera 20 to the controller 81 issued, and the controller 81 Judges from the images the quality of the layers 2 - 5 , But also the camera 20 (For example, the calculation section 26 ) can the quality of the layers 2 - 5 judging from the recordings and the judgment result to the controller 81 output. In this case, that of the camera 20 to the controller 81 transferred amount of data further reduced and the processing costs are reduced.

(e) In the above-described embodiment, the quality judgment is made based on the relative position of the sheets 2 - 5 However, the quality assessment can be based on the absolute position of the layers 2 - 5 be performed. In this case, the absolute position of the layers 2 - 5 for example, by the winding cores 13 . 14 attached markings are obtained.

It is also an embodiment possible in which the quality assessment takes place by comparing multiple recording with focusing. For example, by taking a picture of the layers 2 - 5 immediately after the start of winding and a recording of the layers 2 - 5 can be compared immediately before winding, if the position change of the layers 2 - 5 along the width direction of the layers 2 - 5 great, it can be stated that the layers 2 - 5 with respect to the axis of rotation of the winding core 13, 14 were wound obliquely, and thus a judgment as "deficient" are made. On the basis of this embodiment, the change in position of the layers 2 - 5 total, which will affect the quality of the battery element 1 even more accurate.

(f) In the above-described embodiment, the release liners become 2 . 3 and the two electrode layers 4 . 5 each via the same transport the hub 13 . 14 fed. Also, the separation layers 2 . 3 and the two electrode layers 4 . 5 recorded at once. However, it is also an embodiment possible, in each case one of the two separating layers 2 . 3 and one of the two electrode layers 4 . 5 via a transport route and the other of the two separating layers 2 , 3 and the other of the two electrode layers 4 . 5 be fed to the winding core via another transport path. In this case, a configuration is possible, wherein the one of the wound on the winding core two separating layers 2 . 3 and one of the two electrode layers 4 . 5 and the other of the wound on the winding core two separating layers 2 . 3 and the other of the two electrode layers 4 . 5 be recorded separately. That is, in the embodiment described above, four plies are picked up at one time, but two plies can be picked up separately as well.

(g) In the embodiment described above, as the winding cores 13 . 14 Winding cores used with an oval shaped outer circumference on which the layers 2 -5 are wound, but is the shape of the hubs 13 . 14 not limited to this. For example, winding cores with a rectangular (flattened), polygonal or elliptical outer circumference can also be used.

(h) The material of the release liners 2 . 3 and electrode layers 4 . 5 is not limited to the embodiment described above. For example, the release liners 2, 3 are formed of PP in the embodiment described above, but the release liners 2 . 3 also be formed of a different insulating material. Also, for example, the active material with which the electrode layers 4 . 5 are coated, can be changed at will.

(i) In the embodiment described above, the take-up section 11 two hubs 13 . 14 on, but there is no limitation in this regard, and it is also possible a configuration in which it has three or more hubs. If only one winding core is present, the spool wheel 12 etc. omitted.

(j) In the embodiment described above, the layers become 2 - 5 directly on the outer circumference of the rotatable hub 13 . 14 wound up, an embodiment with a rotatable shaft portion and arranged on the outer circumference of the shaft portion tubular winding core is possible, on the outer peripheral surface of the layers 2 - 5 be wound up. In this case, the winding core may have a non-circular contour at a cross section orthogonal to its axis of rotation.

LIST OF REFERENCE NUMBERS

1 ... Battery element (winding element), 2, 3 ... Separation layer, 4 ... Cathode layer, 5 ... Anode layer, 10 ... Winding device, 13, 14 ... Winding core, 19a, 19b ... Illumination device (Irradiation means), 20 ... camera (recording means), 21 ... objective, 81 ... control means (recording time control means, quality judging means), 100 ... examination apparatus

Claims (6)

Which is used in the manufacturing process of a winding element which is prepared by a band-shaped cathode layer and anode layer, which are coated with an active material, and are superposed with a formed of an insulating material tape-like release layer therebetween, are wound up by a rotatable winding core in testing apparatus by an irradiation means having the layers wound on the winding core as the examination subject and irradiating the examination subject with a specific light, a recording means receiving the examination subject irradiated with the irradiation means, a recording timing control means which controls the timing of the recording by the recording means, and a quality judging means which judges the quality of the object to be examined based on a photograph obtained by the recording means, wherein the winding core at a cross section orthogonal to its axis of rotation a ni In the course of the rotation of the winding core, the distance from the outer circumferential surface of the winding core to the receiving means varies, the recording timing control means controlling the timing of the pickup by the picking means in accordance with the rotational angle of the winding core such that the picking is performed when the picking means carries out the recording Object of examination focused. Inspection device according to Claim 1 , characterized in that the receiving means comprises a specific lens and is configured such that it is movable along a light axis of the lens relative to the winding core. Inspection device according to Claim 1 or 2 , characterized in that the separating layer is transparent or semitransparent and the receiving means is designed such that it receives at least one of the two electrode layers through the separating layer, whereby the two Electrode layers and the release liner are recorded at once. Inspection device according to one of Claims 1 to 3 , Characterized in that it is operable in a learn mode, to detect the time of recording by the recording means in advance, whereby the receiving means in the learning mode in a state in which the layers are wound onto the winding core, a series of exposure of the examination object created, and from among the plural images obtained by the series exposure, those in which the imaging means focuses the examination subject, and the rotational angle of the hub is detected at the time the images were acquired with focus, the recording timing control means determining the timing the recording by the recording means based on the obtained in the learning mode in advance rotation angle of the winding core controls. Inspection device according to Claim 4 , characterized in that in the learning mode on the basis of the brightness of the images those of the several images are determined, in which the recording means focuses the examination subject. Winding device, characterized in that it comprises an examination device according to one of Claims 1 to 5 having.

Images