JP2019140075A - Manufacturing installation of laminate electrode body - Google Patents

Abstract

To restrain attraction of a separator material after cutting, when attracting a unit structure body on a film by means of a transport device.SOLUTION: A manufacturing installation 100 of laminate electrode body includes a separator material feed gear 21 for feeding a long separator material 40 in one direction, an electrode placement device 22 for placing an electrode 41 on the separator material 40, a bond device 23 for bonding the separator material 40 and the electrode 41, a film supply device 24 for supplying a long film 42 below the separator material 40, first electrification devices 28a, 28b for electrifying one of the separator material 40 and the film 42 positively and electrifying the other negatively, before the film 42 is supplied below the separator material 40, a cutting device 25 for cutting the separator material 40 on the film 42 around the electrode 41, and manufacturing a unit electrode body 44, and a transport device 26 having an attraction part 26a, and attracting the unit electrode body 44 at the attraction part 26a and transporting it to a prescribed position.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for manufacturing a laminated electrode body having a structure in which a plurality of unit electrode bodies each having an electrode bonded to a separator are laminated.

  As a battery electrode body, a laminated electrode body having a structure in which a plurality of positive electrodes and negative electrodes are alternately laminated via separators is known.

  As a method for producing such a laminated electrode body, Patent Document 1 discloses that a long separator material, a positive electrode, a long separator material and a negative electrode are sequentially laminated and then cut into a predetermined shape. A method for producing a laminated electrode body by producing a unit structure and laminating a plurality of the produced unit structures is described.

Special table 2015-5286629 gazette

  Here, when the film is disposed under the separator material and is cut, if the adhesion between the separator material and the film is weak, the separator material is easily peeled off from the film. In that case, the position shift of the unit structure produced by cutting the separator material, the position shift of the separator material after cutting, and the separation of the separator material after cutting from the film will occur. Therefore, when the unit structure is adsorbed by the transport device, there arises a problem that not only the unit structure but also the separator material after cutting is adsorbed.

  This invention solves the said subject, and it aims at providing the technique which suppresses that the separator material after a cutting | disconnection is adsorb | sucked when adsorbing the unit electrode body on a film with a conveying apparatus. .

The production apparatus for the laminated electrode body of the present invention comprises:
An apparatus for producing a laminated electrode body having a structure in which a plurality of unit electrode bodies each having an electrode bonded to a separator are laminated,
A separator material feeding device for feeding a long separator material in one direction;
An electrode mounting device for placing the electrode on the separator material;
A bonding apparatus for bonding the separator material and the electrode;
A film supply device for supplying a long film under the separator material at the same speed as the separator material feed rate;
A first charging device that positively charges one of the separator material and the film and negatively charges the other before the film is supplied under the separator material;
A cutting device for cutting the separator material on the film around the electrode to produce the unit electrode body,
A transporting device having a suction part and sucking the unit electrode body by the suction part and transporting the unit electrode body to a predetermined position;
It is characterized by providing.

The laminated electrode body manufacturing apparatus comprises:
Before the conveyance device adsorbs the unit electrode body, it may further include a second charging device that charges the adsorption portion of the conveyance device to the same polarity as the separator material.

The production apparatus for the laminated electrode body of the present invention comprises:
An apparatus for producing a laminated electrode body having a structure in which a plurality of unit electrode bodies each having an electrode bonded to a separator are laminated,
A separator material feeding device for feeding a long separator material in one direction;
An electrode mounting device for placing the electrode on the separator material;
A bonding apparatus for bonding the separator material and the electrode;
A film supply device for supplying a long film under the separator material at the same speed as the separator material feed rate;
A cutting device for cutting the separator material on the film around the electrode to produce the unit electrode body,
A transporting device having a suction part and sucking the unit electrode body by the suction part and transporting the unit electrode body to a predetermined position;
A charging device that charges the suction portion of the transport device and the separator material to the same polarity before the transport device sucks the unit electrode body;
It is characterized by providing.

  According to the laminated electrode body manufacturing apparatus of the present invention, the first charging device charges one of the separator material and the film positively and the other negatively before the film is supplied under the separator material. Since the charging is performed, the separator material and the film are in close contact with each other. Thereby, since the position shift of the unit electrode body produced by cutting the separator material, the position shift of the separator material after cutting, and peeling of the separator material after cutting from the film can be suppressed, When the transport device sucks the unit electrode body at the suction portion, it can be suppressed that the separator material after cutting is peeled off from the film and sucked by the suction portion.

  Further, according to the laminated electrode body manufacturing apparatus of the present invention, the charging device charges the suction portion of the transport device and the separator material to the same polarity before the transport device sucks the unit electrode body. A repulsive force is generated between the separator material 40. Thereby, it can suppress that the separator material after a cutting | disconnection is adsorbed | sucked to an adsorption | suction part.

It is sectional drawing which shows the structure of a laminated electrode body. It is a side view which shows the structure of the manufacturing apparatus of the laminated electrode body in one Embodiment. It is a top view which shows the separator material after conveying the unit electrode body produced by the cutting | disconnection position of a separator material, and a cutting | disconnection to a predetermined position. It is a side view which shows another structure of the manufacturing apparatus of the laminated electrode body in one Embodiment. It is a side view which shows another structure of the manufacturing apparatus of the laminated electrode body in one Embodiment.

  Embodiments of the present invention will be described below to specifically describe features of the present invention.

  First, the structure of the laminated electrode body manufactured by the laminated electrode body manufacturing apparatus will be described. A laminated electrode body is used for batteries, such as a lithium ion battery, for example.

  FIG. 1 is a cross-sectional view showing the structure of the laminated electrode body 10. The laminated electrode body 10 has a structure in which a plurality of positive electrodes 11 and negative electrodes 12 are alternately laminated via separators 13.

  The positive electrode 11 includes a positive electrode current collector made of a metal foil such as aluminum, and a positive electrode active material layer formed on both surfaces of the positive electrode current collector. The positive electrode active material layer can contain, for example, lithium cobaltate as the positive electrode active material. When the positive electrode is present on the outermost side in the stacking direction of the laminated electrode body 10, the positive electrode located on the outermost side may be configured such that the positive electrode active material layer is formed only on one side of the positive electrode current collector.

  The negative electrode 12 includes a negative electrode current collector made of a metal foil such as copper, and a negative electrode active material layer formed on both surfaces of the negative electrode current collector. The negative electrode active material layer can contain, for example, graphite as a negative electrode active material. When the negative electrode is present on the outermost side in the stacking direction of the laminated electrode body 10, the negative electrode located on the outermost side may be configured such that the negative electrode active material layer is formed only on one surface of the negative electrode current collector. The shape and size of the negative electrode 12 may be the same as or different from the shape and size of the positive electrode 11.

  The separator 13 can be constituted by, for example, a microporous thin film made of polypropylene having excellent insulating properties.

  The laminated electrode body 10 having the structure as described above is produced by, for example, alternately laminating a plurality of unit electrode bodies in which the positive electrode 11 is bonded to the separator 13 and unit electrode bodies in which the negative electrode 12 is bonded to the separator 13. be able to.

  FIG. 2 is a side view showing the configuration of the laminated electrode body manufacturing apparatus 100 according to an embodiment. In one embodiment, the laminated electrode body manufacturing apparatus 100 includes a separator material feeding device 21, an electrode mounting device 22, an adhesive device 23, a film supply device 24, a cutting device 25, a transport device 26, and a recovery device. 27, and before the PET film 42 is supplied under the separator material 40 as will be described later, one of the separator material 40 and the PET film 42 is positively charged and the other is negatively charged. First charging devices 28 a and 28 b, a second charging device 29, and a position correction stage 30 are provided.

  The separator material feeding device 21 unwinds the long separator material 40 wound in a roll shape and sends it in one direction. However, the separator material feeding device 21 is configured to repeat the feeding operation and the stopping operation of the separator material 40. More specifically, the separator material feeding device 21 temporarily stops when the separator material 40 is fed by a predetermined distance, and then intermittently feeds the separator material 40 in one direction in such a manner that the separator material is fed again by the predetermined distance. It is configured as follows.

  The electrode mounting device 22 carries the electrode 41 picked up at a predetermined pickup position and places it on the long separator material 40. The electrode mounting device 22 places the electrode 41 when the separator material 40 is stopped. The electrode 41 is one of a positive electrode and a negative electrode.

  As described above, since the separator material feeding device 21 stops once the separator material 40 is fed by a predetermined distance, the intervals between the plurality of electrodes 41 placed on the separator material 40 are substantially equal. .

  The bonding apparatus 23 has a built-in heater, and the electrode 41 placed on the separator material 40 is sandwiched from the upper side and the lower side thereof, and the electrode 41 is separated from the electrode 41 by a thermocompression bonding method of applying pressure while heating. Adhere to the material 40.

  Note that the method of bonding the electrode 41 to the separator material 40 is not limited to thermocompression bonding, and may be bonded by a method other than thermocompression bonding.

  The film supply device 24 supplies a long PET (polyethylene terephthalate) film 42 under the separator material 40 at the same speed as the feeding speed of the separator material 40. The PET film 42 functions as a carrier film for transporting the separator material 40 and the electrode 41 and also functions as an underlay when the separator material 40 is cut. Accordingly, the film supply device 24 supplies the PET film 42 below the separator material 40 at least at a position before the separator material 40 in the feeding direction with respect to the position at which the separator material 40 is cut by the cutting device 25 described later. .

  In addition, the film supplied under the separator material 40 is not limited to a PET film.

  The first charging devices 28 a and 28 b charge one of the separator material 40 and the PET film 42 positively and the other negatively before the PET film 42 is supplied under the separator material 40. As the first charging devices 28a and 28b, for example, an ionizer can be used.

  Here, the first charging device 28a injects positive ions toward the separator material 40 to positively charge the separator material 40, and the first charging device 28b injects negative ions toward the PET film 42. Thus, the PET film 42 is negatively charged.

  However, the first charging device 28a injects negative ions toward the separator material 40 to negatively charge the separator material 40, and the first charging device 28b injects positive ions toward the PET film 42. The PET film 42 may be configured to be positively charged.

  Adhesion between the separator material 40 and the PET film 42 can be enhanced by charging one of the separator material 40 and the PET film 42 positively and charging the other negatively.

  The cutting device 25 has a cutting blade 25a, and cuts the separator material 40 around the electrode 41 by the cutting blade 25a. Thereby, a unit electrode body 44 in which the electrode 41 is bonded to the separator 43 is produced.

  FIG. 3 is a top view showing the cutting position of the separator material 40 and the separator material 40 after the unit electrode body 44 produced by cutting is conveyed to a predetermined position. In FIG. 3, the cutting position of the separator material 40 around the electrode 41 is indicated by a broken line. The electrode 41 is provided with a tab, which is omitted in FIG.

  The conveyance device 26 includes an adsorption unit 26a, adsorbs the unit electrode body 44 by the adsorption unit 26a, and moves up, and conveys the adsorbed unit electrode body 44 to a predetermined position. In the present embodiment, the transport device 26 transports the attracted unit electrode body 44 to the position correction stage 30.

  The adsorption part 26a is made of a chargeable material, for example, a resin such as an acrylic resin. There is no restriction | limiting in particular in the shape of the adsorption | suction part 26a.

  The adsorbing force when the adsorbing part 26 a adsorbs the unit electrode body 44 is larger than the adhesion force between the separator material 40 and the PET film 42.

  The second charging device 29 charges the suction portion 26 a of the transport device 26 with the same polarity as the separator material 40 before the transport device 26 sucks the unit electrode body 44. The position where the second charging device 29 is provided is not limited to the position shown in FIG. For example, an ionizer can be used as the second charging device 29.

  For example, when the first charging device 28a positively charges the separator material 40, the second charging device 29 positively charges the separator material 40 by ejecting positive ions toward the adsorption portion 26a. When the first charging device 28a charges the separator material 40 negatively, the second charging device 29 charges the separator material 40 negatively by ejecting negative ions toward the adsorption portion 26a.

  The collection device 27 winds up and collects the PET film 42 to which the cut separator material 40 is in close contact. The winding operation by the collecting device 27 is synchronized with the feeding operation of the separator material 40 by the separator material feeding device 21 and the feeding operation of the PET film 42 by the film feeding device 24.

  As described above, the first charging devices 28a and 28b charge one of the separator material 40 and the PET film 42 positively and the other negative before the PET film 42 is supplied under the separator material 40. To charge. Thereby, since the separator material 40 and the PET film 42 are in close contact, the positional deviation of the unit electrode body 44 produced by the cutting device 25 cutting the separator material 40, the positional deviation of the separator material 40 after cutting, and Moreover, peeling of the separator material 40 after cutting from the PET film 42 can be suppressed. Further, it is possible to prevent the position of the separator 43 constituting the unit electrode body 44 from being shifted and entering the separator material 40 after cutting.

  Therefore, when the transport device 26 sucks the unit electrode body 44 by the suction portion 26a, the unit electrode body 44 in which the positional deviation is suppressed is securely sucked, and the separator material 40 after cutting is peeled off from the PET film 42. It can suppress adsorb | sucking to the adsorption | suction part 26a.

  Further, since the second charging device 29 charges the suction portion 26a of the transport device 26 with the same polarity as the separator material 40 before the transport device 26 sucks the unit electrode body 44, the unit electrode body is used by the suction portion 26a. When adsorbing 44, a repulsive force is generated between the cut separator material 40 and the adsorbing portion 26a. Thereby, it can suppress that the separator material 40 after a cutting | disconnection is adsorb | sucked by the adsorption | suction part 26a.

  The present invention is not limited to the above embodiment, and various applications and modifications can be made within the scope of the present invention.

  For example, as shown in FIG. 4, the second charging device 29 may be omitted. Even in such a configuration, the first charging devices 28a and 28b charge one of the separator material 40 and the PET film 42 positively and the other negatively, thereby separating the separator material 40 and the PET film. Since the adhesive force with 42 is improved, it is possible to prevent the separator material 40 after being cut from being peeled off from the PET film 42 and adsorbed to the adsorbing portion 26a.

  Further, as shown in FIG. 5, the first charging device 28b may be omitted. Even in such a configuration, since the second charging device 29 charges the suction portion 26a of the transport device 26 to the same polarity as the separator material 40, the second charging device 29 is interposed between the separator material 40 after being cut and the suction portion 26a. Produces a repulsive force. Thereby, when the unit electrode body 44 is adsorbed by the adsorbing part 26a of the transport device 26, it is possible to suppress the separator material 40 after being adsorbed to the adsorbing part 26a.

DESCRIPTION OF SYMBOLS 10 Stacked electrode body 11 Positive electrode 12 Negative electrode 13 Separator 21 Separator material feeding apparatus 22 Electrode mounting apparatus 23 Adhesion apparatus 24 Film supply apparatus 25 Cutting apparatus 26 Conveying apparatus 26a Adsorption part 27 Recovery apparatus 28a, 28b 1st charging apparatus 29 2nd charging Apparatus 30 Position correction stage 40 Separator material 41 Electrode 42 PET film 43 Separator 44 Unit electrode body 100 Multilayer electrode body manufacturing apparatus

Claims (3)

In the production apparatus for a laminated electrode body having a structure in which a plurality of unit electrode bodies each having an electrode bonded to a separator are laminated,
A separator material feeding device for feeding a long separator material in one direction;
An electrode mounting device for placing the electrode on the separator material;
A bonding apparatus for bonding the separator material and the electrode;
A film supply device for supplying a long film under the separator material at the same speed as the separator material feed rate;
A first charging device that positively charges one of the separator material and the film and negatively charges the other before the film is supplied under the separator material;
A cutting device for cutting the separator material on the film around the electrode to produce the unit electrode body,
A transporting device having a suction part and sucking the unit electrode body by the suction part and transporting the unit electrode body to a predetermined position;
An apparatus for producing a laminated electrode body, comprising: In the production apparatus for a laminated electrode body having a structure in which a plurality of unit electrode bodies each having an electrode bonded to a separator are laminated,
A separator material feeding device for feeding a long separator material in one direction;
An electrode mounting device for placing the electrode on the separator material;
A bonding apparatus for bonding the separator material and the electrode;
A film supply device for supplying a long film under the separator material at the same speed as the separator material feed rate;
A cutting device for cutting the separator material on the film around the electrode to produce the unit electrode body,
A transporting device having a suction part and sucking the unit electrode body by the suction part and transporting the unit electrode body to a predetermined position;
A charging device that charges the suction portion of the transport device and the separator material to the same polarity before the transport device sucks the unit electrode body;
An apparatus for producing a laminated electrode body, comprising:   2. The second charging device according to claim 1, further comprising a second charging device that charges the suction portion of the transport device to the same polarity as the separator material before the transport device sucks the unit electrode body. A manufacturing apparatus for a laminated electrode body.

Images