JP2017152075A - Supply device for electrode plate of secondary battery, and control method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supply device for electrode plates of a secondary battery capable of contributing to mass-production of high-quality batteries by surely preventing two pieces from being fetched even if a tact time is shortened.SOLUTION: A supply device comprises: a tray 11 housing multiple electrode plates 1, 2 stacked on a mount base 19; lift means 12 configured to lift the mount base 19 within the tray 11; height position detection sensors 13, 14 configured to detect the presence of the highest-order electrode plates 1, 2 at predetermined height positions; handling nozzles 15, 16 configured to blow air between the electrode plates 1, 2 stacked within a predetermined range; conveyance means 18 for conveying surfaces of the highest-order electrode plates 1, 2; and a separating nozzle 17 configured to discharge air from sides of the electrode plates 1, 2 sucked and suspended by the conveyance means 18 towards the electrode plates 1, 2. Air is discharged from the handling nozzles 15, 16, the surfaces of the highest-order electrode plates 1, 2 are sucked and suspended by the conveyance means 18 in a state where the electrode plates 1, 2 are floated by an air layer 25 formed as a result of the discharge of air, and air is discharged from the separating nozzle 17.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an electrode plate supply device for a secondary battery and a control method thereof, and is particularly useful when applied to taking out an electrode plate in a process of alternately laminating separators and electrode plates in a lithium ion battery manufacturing process. is there.

  As a type of lithium ion secondary battery, a unit power generation element is configured by laminating a positive electrode plate and a negative electrode plate facing each other across a separator that is an insulator, and a plurality of the power generation elements are integrated. Have a stack structure.

  4A and 4B are diagrams showing a positive electrode plate of a lithium ion secondary battery having a stack structure, where FIG. 4A is a plan view thereof, FIG. 4B is a side view thereof, and FIG. 5 is a diagram showing a negative electrode plate. Is a plan view thereof, and (b) is a side view thereof. As shown in FIG. 4, positive electrode plate 1 (hereinafter simply referred to as electrode plate 1) has positive electrode active material 5 (hereinafter simply referred to as active material) on both surfaces of positive electrode sheet 3 (hereinafter simply referred to as electrode sheet 3). 5 is applied, and a connection portion 7 for connecting to a positive electrode connection terminal (not shown) is formed at an end portion (left end portion in FIG. 4). The connection part 7 is a tab to which the active material 5 is not applied. The electrode sheet 3 is not particularly limited as long as it has electrical conductivity and the active material 5 can be applied on the surface thereof. For example, the electrode sheet 3 is formed of an aluminum foil.

  On the other hand, as shown in FIG. 5, the negative electrode plate 2 (hereinafter simply referred to as electrode plate 2) has a negative electrode active material 6 (hereinafter simply referred to as “electrode plate 4”) on both surfaces of a negative electrode sheet 4 (hereinafter simply referred to as “electrode sheet 4”). An active material 6) is applied and formed at its end (the right end in FIG. 5) is formed with a connection 7 for connection to a negative electrode connection terminal (not shown). The connection part 7 is a tab to which the active material 6 is not applied. The electrode sheet 4 has electrical conductivity and is not particularly limited as long as the active material 6 can be applied on the surface. For example, the electrode sheet 4 is formed of copper foil.

  As shown in FIG. 6, the electrode plates 1 and 2 are inserted into the valley grooves 8 </ b> A of the separator 8 so as to face each other with the bellows-folded insulator separator 8 interposed therebetween.

  Conventionally, the electrode plates 1 and 2 are inserted into the separator 8 manually one by one. In this case, in the previous step, it is necessary to prepare separately for each of the positive electrode plate 1 and the negative electrode plate 2 on both sides of the separator 8 in which the electrode plates 1 and 2 are bellows-folded.

  In order to automate the work while shortening the tact time as much as possible in consideration of the preparation in the preceding process, without taking two electrode plates 1 and 2 laminated for each of the positive electrode and the negative electrode It is important to realize automation of the removal work that can be taken out one by one reliably.

  Patent document as a publicly known document disclosing means for supplying an electrode plate by adsorbing a positive electrode and a negative electrode on the uppermost surface with an electrode transfer and supplying them on a separator among positive and negative electrodes individually stacked and accommodated in a positive electrode and negative electrode magazine 1 exists.

JP-A-2005-50583

  However, Patent Document 1 merely discloses that the positive electrode and the negative electrode are adsorbed by the electrode transfer and supplied onto the separator, and does not take positive and reliable measures to prevent the two electrode plates from being taken. . Therefore, it is necessary to increase the tact time of driving the electrode transfer in order to avoid the occurrence of two sheets, or the work is interrupted each time two sheets occur frequently. In any case, there is a big problem that the total tact time becomes long.

  In view of the above prior art, the present invention provides an apparatus for supplying an electrode plate for a secondary battery and a method for controlling the same, which can reliably prevent the removal of two sheets even when the tact time is shortened and contribute to the mass production of a high-quality battery. The purpose is to provide.

The first aspect of the present invention for achieving the above object is as follows:
A tray for storing a plurality of sheet-like electrode plates stacked on the mounting table together with the mounting table;
Elevating means for elevating and lowering the mounting table in the tray;
A height position detection sensor for detecting that the uppermost electrode plate among the electrode plates stacked on the tray is present at a predetermined height position;
A firing nozzle disposed on both sides of the electrode plate so as to blow air between the electrode plates stacked over a range of a predetermined width from the predetermined height position;
Conveying means for adsorbing and conveying the surface of the uppermost electrode plate;
A separation nozzle for discharging air from the side of the electrode plate conveyed by the conveying means toward the electrode plate;
An apparatus for supplying an electrode plate of a secondary battery, comprising: control means for controlling operation of the elevating means and the conveying means, and controlling air discharge from the firing nozzle and the separation nozzle.

  According to this aspect, an air layer can be formed between the stacked electrode plates by the air blown from the firing nozzle. As a result, the electrode plate in the uppermost region to which the air is supplied can be floated by the air layer to prevent the electrode plates from sticking to each other, and each electrode plate can be separated from the other electrode plates. Furthermore, air is discharged from the separation nozzle toward the side of the electrode plate to be conveyed, so even if a plurality of sheets are adhered, the electrode plates other than the top are separated and fall downward. Can be made.

The second aspect of the present invention is:
In the supply device for the electrode plate of the secondary battery described in the first aspect,
A plurality of the firing nozzles are provided, and each of the firing nozzles is disposed at a position facing each other across the electrode plate.

  According to this aspect, the air layer can be easily formed between the electrode plates by discharging air from both sides of the electrode plates by the nozzles disposed at positions facing each other across the electrode plates. The electrode plate can be eliminated and the electrode plate can be transported more easily.

The third aspect of the present invention is:
In the supply device for the electrode plate of the secondary battery described in the first aspect or the second aspect,
In the electrode plate supply device for a secondary battery, the firing nozzle is arranged so that air is discharged while avoiding an uncoated portion of the active material in the electrode plate.

  According to this aspect, it is possible to prevent the uncoated portion of the active material in the electrode plate from being bent by air.

The fourth aspect of the present invention is:
In the secondary battery electrode plate supply apparatus described in the first to third aspects,
The firing nozzle is provided in an apparatus for supplying an electrode plate of a secondary battery, characterized in that air is obliquely ejected from a central side of the tray toward one end side.

  According to this aspect, since air is jetted from one side of the firing nozzle toward the one end side from the center side of the tray, the electrode plate floated in the air layer formed by the blown air, A force from the central side toward the end side is applied by the air. As a result, the electrode plate moves in the horizontal direction from the central side toward the one end side, and the electrode plate can be brought into contact with a member that restricts movement, such as one side of the tray that intersects the moving direction. . By this contact, the electrode plate can be positioned in the horizontal direction.

According to a fifth aspect of the present invention,
In the secondary battery electrode plate supply apparatus described in the fourth aspect,
The secondary battery is characterized in that the electrode plate is laminated so that an uncoated portion of the active material on the electrode plate is on an end side opposite to the one end side of the tray. The electrode plate supply device.

  According to this aspect, the active material is applied and can be positioned using one side of the electrode plate which is thicker than the uncoated portion of the active material consisting only of the thin electrode sheet and has a high strength. .

The sixth aspect of the present invention is:
In the electrode plate supply device for any one of the secondary batteries described in the first to fifth aspects,
The lifting and lowering means has a plurality of rod-shaped members that are lifted and lowered independently, and each tip abuts against the lower surface of the mounting table.
When the height of the electrode plate detected by the height position detection sensor is different, the control means raises and lowers the rod-shaped member independently so that the heights of the electrode plates coincide with each other. The apparatus for supplying an electrode plate of a secondary battery is characterized in that the elevating means is controlled so as to adjust the inclination in the horizontal direction.

  According to this aspect, even when the positions of both ends of the electrode plate are different due to warpage or the like, the height positions can be matched. As a result, the adsorption of the electrode plate by the conveying means can be performed more reliably.

The seventh aspect of the present invention is
In the supply device for an electrode plate of any one of the secondary batteries described in the first to sixth aspects,
An electrode of a secondary battery comprising a thickness sensor for detecting a state in which a plurality of electrode plates are placed by detecting a thickness of the electrode plate conveyed by the conveying means In the board feeding device.

  According to this aspect, it is possible to detect well so-called two-sheet removal of the electrode plate mounted on the mounting table.

The eighth aspect of the present invention is
Among the electrode plates stacked on the mounting table, a mounting table that mounts a plurality of sheet-like electrode plates stacked in the vertical direction and moves the tray up and down, a lifting unit that lifts and lowers the mounting table, Air is blown between the height position detection sensor for detecting that the uppermost electrode plate is present at a predetermined height position and the electrode plates stacked from the predetermined height position over a predetermined width range. The nozzles disposed on both sides of the electrode plate, the conveying means for adsorbing and conveying the surface of the uppermost electrode plate, and from the side of the electrode plate conveyed by the conveying means toward the electrode plate And a control method in a supply device for an electrode plate of a secondary battery having a separation nozzle for discharging air,
The raising / lowering means is driven until the height position detection sensor detects the uppermost electrode plate to raise the mounting table, and air is discharged from the firing nozzle and stacked in a range of the predetermined width. Air is blown between the electrode plates, the air is blown, the surface of the uppermost electrode plate is adsorbed and suspended by the conveying means, air is discharged from the separation nozzle, and then the adsorbed electrode plate In the control method in the supply device for the electrode plate of the secondary battery.

  According to this aspect, the supply device of the electrode plate to be controlled can be automatically operated sequentially according to a predetermined procedure.

  According to the present invention, not only the uppermost electrode plate is blown by the air blown from the firing nozzle, but also from the side of the electrode plate that is adsorbed and suspended in the adsorbed state of the electrode plate toward the electrode plate. Since the air is discharged from the separation nozzle, the electrode plates other than the uppermost part can be separated by the air discharged from the separation nozzle and dropped down even when the plurality of sheets are suspended. . As a result, the probability of taking two electrode plates can be reduced as much as possible.

It is the schematic block diagram seen from the front which shows the supply apparatus of the electrode plate of the secondary battery which concerns on embodiment of this invention. It is the schematic block diagram seen from the upper surface which shows the supply apparatus of the electrode plate of the secondary battery which concerns on embodiment of this invention. It is a block diagram which shows the control system of FIG. It is a figure which shows the positive electrode plate of the lithium ion secondary battery of a stack structure, (a) is the top view, (b) is the side view. It is a figure which shows the negative electrode plate of the lithium ion secondary battery of a stack structure, (a) is the top view, (b) is the side view. It is explanatory drawing which shows the aspect in the case of inserting an electrode plate in each trough of the separator folded accordion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the same parts as those in FIGS. 4 to 6 are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic configuration view of a secondary battery electrode plate supply device according to an embodiment of the present invention as viewed from the front, and FIG. 2 is a schematic configuration diagram of the electrode plate supply device shown in FIG. It is. As shown in both figures, the electrode plate supply apparatus according to the present embodiment includes a tray 11, an elevating means 12, height position detection sensors 13 and 14, firing nozzles 15 and 16, a separation nozzle 17, a conveying means 18, and temporary placement. A table 22 is provided. The electrode plate 1 and the electrode plate 2 are stored in different trays 11, but the configuration of the electrode plate supply device in the electrode plate 1 and the configuration of the electrode plate supply device in the electrode plate 2 are the same. Therefore, in the following description, an electrode plate supply device will be described as the electrode plates 1 and 2.

  The tray 11 is a frame that houses a plurality of sheet-like electrode plates 1 and 2 stacked on the plate-like mounting table 19 of the elevating means 12 together with the mounting table 19. The lifting / lowering means 12 has a mounting table 19 and two rod-like members 20 and 21 extending vertically. The rod-shaped members 20 and 21 are independently expanded and contracted by individual driving of a driving means (not shown), and the respective front end surfaces are brought into contact with the lower surface of the mounting table 19. Therefore, the rod-shaped members 20 and 21 can appropriately tilt the mounting table 19 by adjusting the upward push-up amount by individual expansion and contraction.

  The height position detection sensors 13 and 14 detect that the uppermost electrode plates 1 and 2 among the electrode plates 1 and 2 stacked on the tray 11 are present at a predetermined height position. In this embodiment, the electrode plates 1 and 2 are arranged so as to have the same height on both the left and right sides in the horizontal direction along one side. More specifically, the height position detection sensors 13 and 14 have light emitting portions 13A and 14A and light receiving portions 13B and 14B, and the light emitted from the light emitting portions 13A and 14A is blocked by the electrode plates 1 and 2. When the incidence to the light receiving portions 13B and 14B is blocked, it is detected that the uppermost electrode plates 1 and 2 of the electrode plates 1 and 2 have reached a predetermined height position. Therefore, as clearly shown in FIG. 2, the light emitting section 13A of the height position detection sensor 13 is arranged on the left side of the tray 11 in the drawing so as to match the height position of the uppermost electrode plates 1 and 2 to be detected. The light receiving portion 13B is disposed at the same height on the opposite side across the tray 11. That is, the light emitting portion 13A and the light receiving portion 13B are integrated to detect the height position of the left end portion of the electrode plates 1 and 2 existing in the tray 11 between them. Similarly, the light emitting portion 14A of the height position detection sensor 14 is arranged so as to match the height position of the uppermost electrode plates 1 and 2 to be detected on the right side of the tray 11 in the drawing, and the light receiving portion 14B. Are arranged at the same height on the opposite side across the tray 11. The light emitting portion 14A and the light receiving portion 14B are integrated to detect the height position of the right end portion in the drawing of the electrode plates 1 and 2 existing between them in the tray 11.

  It is not always necessary to arrange two sets of height position detection sensors 13 and 14 on the left and right sides of the electrode plates 1 and 2 stacked on the tray 11 as in this embodiment. However, by detecting the respective height positions on the left and right sides of the electrode plates 1 and 2, the displacement of the height positions of the electrode plates 1 and 2 on the left and right sides due to deformation of the electrode plates 1 and 2 is corrected. The center surface of the plates 1 and 2 can be held horizontally. Thus, by holding the electrode plates 1 and 2 horizontally, it is possible to satisfactorily attract and suspend the electrode plates 1 and 2 by the conveying means 18 described later. Based on the height position detection results of the height position detection sensors 13 and 14, when correcting the deviation of the height positions of the left and right electrode plates 1 and 2, the detection results of the height positions of the electrode plates 1 and 2 are used. Based on this, the rod-shaped member 20 or the rod-shaped member 21 is moved up and down independently. As a result, the mounting table 19 is appropriately inclined with respect to the horizontal plane so that the posture of the uppermost electrode plates 1 and 2 is corrected to be horizontal. Incidentally, the electrode plates 1 and 2 may be curved due to the winding habits of the electrode sheets 3 and 4 in the manufacturing process, and in the detection of the height position of only one location, for example, There is a case where the influence of the case where one end is lowered cannot be removed. That is, there may be a case where the electrode plates 1 and 2 cannot be accurately suspended in the next transport process. On the other hand, even if the electrode plates 1 and 2 are curved due to the curl of the electrode sheets 3 and 4 by detecting the height positions at a plurality of locations as shown in FIG. The postures of the electrode plates 1 and 2 can be corrected to be horizontal.

  The same adjustment of the height position can be realized by the following configuration. In other words, light was applied to the squares of the uppermost electrode plates 1 and 2 stacked and placed on the mounting table 19 from vertically above the electrode plates 1 and 2 and reflected by the squares of the electrode plates 1 and 2, respectively. By measuring the return time of the reflected light, the distance to each point of the four corners is obtained, and the height position of each point is detected based on each distance. In this case, in order to adjust the height position of each of the four detected points, the same two rod-shaped members as the rod-shaped members 20 and 21 are added to adjust the height position of each point. Adjust the point height position. In this case, the influence of the distortion of the surfaces of the electrode plates 1 and 2 can be removed more accurately.

  The firing nozzles 15 and 16 are formed on one side of the electrode plates 1 and 2 intersecting the blowing direction (vertical direction in FIG. 2) so as to blow air into the electrode plates 1 and 2 stacked in the vertical direction within a predetermined width range. Dispersed on the left and right sides in the horizontal direction (left and right direction in FIG. 1) along the line. In the present embodiment, similar nozzles 15 and 16 are disposed on the opposite sides (the opposite sides in the vertical direction in FIG. 2) across the tray 11 at the respective locations. Specifically, the firing nozzles 15 and 15 are disposed at the same position in FIG. 2 so that air is blown into a predetermined range of the left side portion of the electrode plates 1 and 2 in FIG. 2, two pieces are arranged at the same position in FIG. 2 so that air is blown into a predetermined range of the right part in FIG. Thus, an air layer 25 (shown by... In FIG. 1) can be formed between the electrode plates 1 and 2 stacked in the vertical direction by the air blown from the firing nozzles 15 and 16. As a result, the electrode plates 1 and 2 in the uppermost region to which air is supplied are floated by the air layer 25 to prevent the electrode plates 1 and 2 from adhering to each other. Can be separated from.

  Furthermore, in this embodiment, the firing nozzles 16 are formed so as to inject air obliquely from the center side of the tray 11 toward the end portion (left end portion in the figure). In this case, air is injected obliquely from the center side of the tray 11 toward the end side (right side in FIG. 1) from the firing nozzles 16 and 16, so that the air is blown between the upper and lower electrode plates 1 and 2. A force directed from the center side toward the end portion side acts on the electrode plates 1 and 2 floated in the air layer 25 formed by the air that has been blown by the air blown obliquely. As a result, the electrode plates 1 and 2 move horizontally from the center side toward the end portion in the right direction in the figure, and the electrode plates are placed on one side of the tray 11 which is a member that restricts the movement of the electrode plates 1 and 2. The right ends of the figures 1 and 2 can be brought into contact with each other. This contact positions the electrode plates 1 and 2 in the horizontal direction. Here, the electrode plates 1 and 2 are connected to the side opposite to the side in contact with one side of the tray 11, and are connected portions (tabs) 7 that are uncoated portions of the active material of the electrode sheets 3 and 4 in the electrode plates 1 and 2. It is desirable to laminate so that This is because the active material 5 or 6 is applied, and the electrode plate is thicker than the connection portion (tab) 7 made of only the thin film electrode sheets 3 and 4 by the thickness of the active material 5 and 6 and has a high strength. This is because the electrode plates 1 and 2 can be positioned satisfactorily using one side of 1 and 2 without bending.

  The separation nozzle 17 is disposed between the firing nozzles 15 and 16 on one side (the lower side in FIG. 2) and the other side (the upper side in FIG. 2) with the tray 11 in between. For conveyance, air is discharged from the side of the adsorbed and suspended electrode plates 1 and 2 toward the electrode plates 1 and 2. For example, air is discharged toward one side of the electrode plates 1 and 2 so that air wraps around the lower surfaces of the adsorbed and suspended electrode plates 1 and 2, or The air may be discharged obliquely downward from above. In this way, by discharging air from the separation nozzle 17 toward the side of the electrode plates 1 and 2, the electrode plates 1 and 2 are suspended in a state where a plurality of sheets are attached, that is, in a state of taking two sheets. Even if it is lowered, the electrode plates 1 and 2 other than the uppermost part to be adsorbed are separated and fall downward.

  The transport unit 18 includes suction units 18A and 18B, an arm 18C, a connecting member 18D, and a rotary shaft 18E. The transport unit 18 sucks the surfaces of the uppermost electrode plates 1 and 2 stacked in the tray 11 to serve as a tray 11. The electrode plates 1 and 2 are transported and placed on a temporary placement table 22 which is a flat plate disposed adjacent to the plate. More specifically, one end of the connecting member 18D is supported by a rotating shaft 18E that is a vertical shaft, and is formed so as to be rotatable in a horizontal plane as the rotating shaft 18E rotates. Here, the rotating shaft 18E is formed to be extendable and contractable in the axial direction. As a result, in the state shown in FIG. 1, the connecting member 18 </ b> D whose front end portion (left end portion in the figure) is located above the tray 11 is rotated 180 ° with the rotation of the rotation shaft 18 </ b> E, and the front end portion (FIG. The middle right end portion) is positioned above the temporary placement table 22 and is formed such that its height position can be adjusted as the rotary shaft 18E expands and contracts. The central portion of the arm 18C is suspended from the distal end portion of the connecting member 18D, and the adsorbing portions 18A and 18B are suspended from both end portions of the arm 18C. Thus, the adsorption portions 18A and 18B can be lowered from above the uppermost electrode plates 1 and 2 floating in the air layer 25 to adsorb and suspend two places on the surface of the electrode plates 1 and 2. As described above, in the suspended state, air for preventing two sheets is blown by the separation nozzle 17, and then the connecting member 18D is rotated about the rotation shaft 18E and is adsorbed by the adsorption portions 18A and 18B. The electrode plates 1 and 2 are transported above the temporary placement table 22, and then the rotating shaft 18 </ b> E is lowered and the suction is released to place the electrode plates 1 and 2 on the temporary placement table 22. Here, the suction portions 18A and 18B generate suction force by applying a negative pressure to an opening (not shown) that opens downward, and release suction by releasing the negative pressure.

  Note that the number of suction portions of the transport unit 18 is not necessarily limited to two. Of course, four or six cases are also conceivable. When the number of suction parts increases and the number of suction points increases, it is possible to prevent the suspended electrode plates 1 and 2 from being drooped. As a result, the trays 11 of the electrode plates 1 and 2 can be smoothly performed, and the tact time can be shortened accordingly.

  A thickness sensor 23 for detecting the thickness of the placed electrode plates 1 and 2 is disposed at the center of the temporary placement table 22, and the electrode plates 1 and 2 are attracted and fixed from below. A suction portion 24 is provided. Therefore, the thickness of the electrode plates 1 and 2 placed on the temporary placement table 22 is detected by the thickness sensor 23 while being fixed by the suction portion 24. As a result, when it is detected that the detected thickness exceeds a predetermined threshold, it is determined that two sheets are taken. Thus, it is possible to reliably detect in the temporary placement table 22 the two-sheet pick-up that is probably extremely small due to the two-sheet pick-up preventing function by the separation nozzle 17. Here, the thickness sensor 23 can be satisfactorily configured with an ultrasonic sensor.

  In the present embodiment, each operation described above is realized by sequential control by the control system. FIG. 3 is a block diagram showing a control system of the apparatus shown in FIG. As shown in the figure, the control system includes height position detection sensors 13 and 14 and a thickness sensor 23 as sensors. The lifting / lowering means 12, the firing nozzles 15 and 16, the separation nozzle 17, and the conveying means 18. Further, the suction unit 24 is to be controlled. Thus, the arithmetic processing unit 26 that drives and controls each control object based on the detection information of the sensor drives the elevating means 12 until the height position detection sensors 13 and 14 detect the uppermost electrode plates 1 and 2. The electrode plates 1 and 2 are raised. Next, the arithmetic processing unit 26 discharges air from the firing nozzles 15 and 16 based on the fact that the height position detection sensors 13 and 14 have detected that the electrode plates 1 and 2 have reached the uppermost position. Thus, air is blown into the electrode plates 1 and 2 stacked in a predetermined width range, and an air layer 25 is formed between the electrode plates 1 and 2 stacked adjacently in the vertical direction. Thus, in a state where the electrode plates 1 and 2 are floated by the air layer 25, the arithmetic processing unit 26 drives the conveying means 18 to adsorb and suspend the surfaces of the uppermost electrode plates 1 and 2. In this state, the arithmetic processing unit 26 discharges air from the separation nozzle 17 toward the side surfaces of the suspended electrode plates 1 and 2. Thus, even when a plurality of electrode plates 1 and 2 are adsorbed, the uppermost electrode plates 1 and 2 are left and the others are separated and dropped. Thereafter, the arithmetic processing unit 26 drives the arm 18 </ b> C of the transport unit 18 to be positioned above the temporary placement table 22, and transports and places the adsorbed electrode plates 1 and 2 on the temporary placement table 22. Here, the arithmetic processing unit 26 sucks the electrode plates 1 and 2 placed on the temporary placement table 22 by the suction unit 24, and the thickness of the electrode plates 1 and 2 placed by the thickness sensor 23. When the thickness exceeds a predetermined thickness, it is determined that two sheets are taken, and this state is notified.

  According to the present embodiment, not only the uppermost electrode plates 1 and 2 are blown by the air blown from the firing nozzles 15 and 16, but also the electrodes that are adsorbed and suspended in the adsorbed state of the electrode plates 1 and 2. Since air is discharged from the separation nozzle 17 toward the side surfaces of the plates 1 and 2, the separation nozzle 17 discharges the electrode plates 1 and 2 other than the uppermost portion even when the plurality of plates are suspended. It can be separated by air and dropped down. As a result, the probability of taking two electrode plates can be reduced as much as possible. Further, the temporary placement table 22 can also detect the two-piece picking and further reduce the probability of picking two pieces, thereby contributing to the reduction of the tact time.

  The configuration of the electrode plate supply device of the present invention is not limited to the configuration of the present embodiment described above, and can be changed without departing from the spirit of the present invention. For example, the four firing nozzles 15 and 16 are provided in total with the electrode plates 1 and 2 interposed therebetween. However, the present invention is not limited to this. The firing nozzle 16 sufficiently forms the air layer 25, and the electrode plates 1 and 2. As long as it can be moved and positioned, the firing nozzle 15 does not have to be provided. Further, the number of the suction portions 24 of the temporary placement table 22 may be configured by a number different from the number shown in the description of the present embodiment, such as three or four.

  In addition, the electrode plate supply device of the present invention has been described as supplying an electrode plate in a power generation element in which a positive electrode plate and a negative electrode plate are sandwiched between and opposed to each other. However, the present invention can be applied to an apparatus that takes out a desired one from a state in which a plurality of light and thin electrode plates that can be made by forming an air layer are stacked.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used in the industrial field for manufacturing secondary batteries, particularly lithium ion batteries having a stack structure.

1, 2 Electrode plate 3, 4 Electrode sheet 5, 6 Active material 7 Connection (tab)
DESCRIPTION OF SYMBOLS 11 Tray 12 Elevating means 13, 14 Height position detection sensor 15, 16 Separating nozzle 17 Separating nozzle 18 Conveying means 19 Mounting table 20, 21 Rod-like member 22 Temporary mounting table 23 Thickness sensor 24 Adsorption part 25 Air layer 26 Arithmetic processing Part

Claims (8)

A tray for storing a plurality of sheet-like electrode plates stacked on the mounting table together with the mounting table;
Elevating means for elevating and lowering the mounting table in the tray;
A height position detection sensor for detecting that the uppermost electrode plate among the electrode plates stacked on the tray is present at a predetermined height position;
A firing nozzle disposed on both sides of the electrode plate so as to blow air between the electrode plates stacked over a range of a predetermined width from the predetermined height position;
Conveying means for adsorbing and conveying the surface of the uppermost electrode plate;
A separation nozzle for discharging air from the side of the electrode plate conveyed by the conveying means toward the electrode plate;
An apparatus for supplying an electrode plate of a secondary battery, comprising: control means for controlling operation of the elevating means and the conveying means, and controlling air discharge from the firing nozzle and the separation nozzle. In the supply device of the electrode plate of the rechargeable battery according to claim 1,
A device for supplying an electrode plate of a secondary battery, wherein a plurality of the firing nozzles are provided, and each of the firing nozzles is disposed at a position facing each other across the electrode plate. In the supply apparatus of the electrode plate of the secondary battery as described in Claim 1 or Claim 2,
The apparatus for supplying an electrode plate of a secondary battery, wherein the firing nozzle is arranged so that air is discharged while avoiding an uncoated portion of the active material in the electrode plate. In the supply apparatus of the electrode plate of any one secondary battery as described in any one of Claims 1-3,
The apparatus for supplying an electrode plate of a secondary battery, wherein the firing nozzle is formed so as to inject air obliquely from the center side of the tray toward one end side. In the supply apparatus of the electrode plate of the secondary battery described in claim 4,
The secondary battery is characterized in that the electrode plate is laminated so that an uncoated portion of the active material on the electrode plate is on an end side opposite to the one end side of the tray. Electrode plate supply device. In the supply apparatus of the electrode plate of any one secondary battery as described in any one of Claims 1-5,
The lifting and lowering means has a plurality of rod-shaped members that are lifted and lowered independently, and each tip abuts against the lower surface of the mounting table.
When the height of the electrode plate detected by the height position detection sensor is different, the control means raises and lowers the rod-shaped member independently so that the heights of the electrode plates coincide with each other. An apparatus for supplying an electrode plate of a secondary battery, wherein the elevating means is controlled so as to adjust a horizontal inclination. In the supply apparatus of the electrode plate of any one secondary battery as described in any one of Claims 1-6,
An electrode of a secondary battery comprising a thickness sensor for detecting a state in which a plurality of electrode plates are placed by detecting a thickness of the electrode plate conveyed by the conveying means Board feeding device. Among the electrode plates stacked on the mounting table, a mounting table that mounts a plurality of sheet-like electrode plates stacked in the vertical direction and moves the tray up and down, a lifting unit that lifts and lowers the mounting table, Air is blown between the height position detection sensor for detecting that the uppermost electrode plate is present at a predetermined height position and the electrode plates stacked from the predetermined height position over a predetermined width range. The nozzles disposed on both sides of the electrode plate, the conveying means for adsorbing and conveying the surface of the uppermost electrode plate, and from the side of the electrode plate conveyed by the conveying means toward the electrode plate And a control method in a supply device for an electrode plate of a secondary battery having a separation nozzle for discharging air,
The raising / lowering means is driven until the height position detection sensor detects the uppermost electrode plate to raise the mounting table, and air is discharged from the firing nozzle and stacked in a range of the predetermined width. Air is blown between the electrode plates, the air is blown, the surface of the uppermost electrode plate is adsorbed and suspended by the conveying means, air is discharged from the separation nozzle, and then the adsorbed electrode plate Is conveyed to a predetermined position. A control method in an electrode plate supply device for a secondary battery.

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