JP2010033727A - Insulator sticking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insulator sticking device with good workability which in itself can stick insulating films onto both sides of an electrode, in one sticking the insulation films on both sides in crossing an electrode winding direction. <P>SOLUTION: After the insulating film is stuck onto a front surface of the electrode body 2 with a first pasting mechanism 5, the electrode body 2 is reversed, and a second pasting mechanism 10 sticks the insulating film onto a back surface of the electrode body, and then, the electrode body 2 is reversed again. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an insulator pasting apparatus for pasting an insulator to an electrode in the manufacture of a battery in which a positive electrode and a negative electrode are laminated or spirally wound via a separator.

  As a battery used as a power source for a small electronic device used in various portable devices, a small and large capacity lithium ion secondary battery or the like is used. The positive electrode of these batteries is a strip-shaped positive electrode current collector made of aluminum foil with a positive electrode mixture layer applied, and the negative electrode is made of a copper foil and a negative electrode current collector made of a copper foil. What applied the mixture layer is used.

  The mixture layer is intermittently applied to both sides of the current collector in order to design the opposing area of the positive and negative electrodes with the minimum necessary. Then, the battery element produced by winding the positive electrode and the negative electrode many times through the separator is housed in a cylindrical battery can, or the wound battery element is formed into a flat shape to form a square battery. A battery is manufactured by enclosing it in a can, injecting an electrolytic solution, and then sealing it.

  The application boundary between the positive electrode mixture layer applied to the positive electrode current collector or the negative electrode mixture layer applied to the negative electrode current collector has a high short potential, and a technique for attaching an insulating film has been introduced. Patent Document 1 describes a method in which a tape-like insulating film is attached to a desired position of a strip for an electrode body so as to be orthogonal to the extending direction of the current collector.

  In the case where a single device has a mechanism for attaching insulating films to both front and back surfaces of an electrode body, a method of arranging a first sticking mechanism and a second sticking mechanism on the upper and lower surfaces of the electrode body, or Patent Document 2 describes A method using an inverting device is conceivable.

JP 2007-31265 A JP 2001-277469 A

  A method for attaching the insulating film to each side of the front and back surfaces will be described with reference to FIG. FIG. 4 is an explanatory diagram of a device configuration for attaching an insulating film to one side of an electrode body.

  When the electrode body 2 is unwound from the unwinding unit 1 and the first positioning sensor 12 detects the application end of the electrode, the electrode application end is sent directly below the insulating film application portion in the first application mechanism 5. A pasting operation is performed. Thereafter, the electrode body 2 is transported and wound around the winding unit 11.

  An insulating film is affixed on one side by performing a series of operations. The operation is completed by moving the electrode body 2 wound up by the winding unit 11 to the unwinding unit 1 and attaching an insulating film to the other surface again. For this reason, when the electrode mixture layer is applied to both surfaces of the metal current collector, it is necessary to repeat the process of attaching the insulating film twice on the front and back sides, and it is necessary to insulate the front and back surfaces of the electrode body with a single device. Compared to the method of attaching the film, the number of man-hours is twice as long.

  In a method in which an insulating film is applied to both the front and back surfaces of an electrode body with a single device and the first and second application mechanisms are disposed on the upper and lower surfaces of the electrode body, the structure of the insulating film application portion disposed on the upper and lower surfaces is It is necessary to change the front and back of the electrode body, which complicates the structure and deteriorates workability.

  In the method of reversing the front and back surfaces by twisting the electrode body as proposed in Patent Document 2, a load is easily applied to the end portion of the metal current collector when twisted, and the metal current collector is as thin as about 10 μm. Since metal foil is used, it is not preferable because it is easily broken. Further, twisting the electrode body is not preferable because the electrode mixture layer may be peeled off from the electrode body.

  That is, the technical problem of the present invention is to provide an insulator sticking device with good workability by sticking an insulating film on both the front and back surfaces of an electrode body with a single device.

  The insulator sticking device of the present invention is an insulator sticking device for sticking an insulating film on both surfaces orthogonal to the electrode winding direction at a desired position of an electrode body in which an electrode mixture layer is intermittently applied on a metal current collector. The first pasting mechanism for pasting an insulating film on the surface of the electrode body, a dancer roller for adjusting the tension of the electrode body, a reversing mechanism for inverting the electrode body, and an insulating film on the back surface of the electrode body It has the 2nd sticking mechanism to stick, and the re-inversion mechanism which reverses the said electrode body again, It is characterized by the above-mentioned.

  The insulator sticking device of the present invention is characterized in that the first sticking mechanism and the second sticking mechanism are located at the same height.

  According to the present invention, an insulating film sticking device with good workability can be obtained by sticking insulating films on both front and back surfaces of an electrode body with a single device.

  According to the present invention, by positioning the first sticking mechanism and the second sticking mechanism at the same height, the insulating film is pasted on both the front and back surfaces of the electrode body with one device, and the work safety is high. A good insulator applicator can be obtained.

  Embodiments of the present invention will be described with reference to the drawings of an insulator pasting apparatus.

  FIG. 3 is an explanatory view of an apparatus configuration in which the heights of the first sticking mechanism and the second sticking mechanism according to the present invention are different. This is a method of attaching an insulating film to both front and back surfaces of the electrode body with a single device other than twisting the electrode body. The first adhesive mechanism reverses the electrode body with the insulating film attached to the surface. By attaching the insulating film to the back surface of the electrode body by the second sticking mechanism, it is possible to arrange the structure of the insulating film sticking portion on the upper surface of the electrode body.

  When the electrode body 2 is unwound from the unwinding unit 1 and the second positioning sensor 18 detects the application end of the electrode body 2, the electrode application end is immediately below the insulating film application portion in the second application mechanism 10. Sent. At the same time, when the first positioning sensor 12 detects the application end portion of the electrode body 2, the electrode application end portion is sent directly under the insulating film application portion in the first application mechanism 5. At this time, the second dancer roller 6 causes the electrode body 2 to be stretched so that the application positions of the first application mechanism 5 and the second application mechanism 10 are appropriate. In this state, the pasting operation is performed at the respective insulating film pasting portions in the first pasting mechanism 5 and the second pasting mechanism 10. After attaching an insulating film on both surfaces of the electrode body 2, the electrode body 2 is wound around the winding unit 11.

  As a result, both the first and second bonding mechanisms 5 and 10 can have the same structure, and an insulating film can be bonded to both the front and back surfaces of the electrode body with a single device, thereby providing an insulator bonding device with good workability. Is possible.

  FIG. 1 is an explanatory view of an apparatus configuration in which a reversing mechanism is provided after the first sticking mechanism according to the present invention.

  The structure of the insulator pasting device is the same as that in FIG. 3. After the insulating film is pasted on the surface of the electrode body 2 by the first pasting mechanism 5, the electrode body 2 is reversed and the second pasting mechanism 10 Then, an insulating film is pasted on the back surface, the electrode body 2 is reversed again, and is wound up by the winding unit 11.

  After the pasting operation is performed at the insulating film pasting portion in the first pasting mechanism 5, the second pasting mechanism 10 is arranged by placing the first roller 7 for reversing the electrode body at a position lower than the first work stage 13. Can be arranged at the same height as the first sticking mechanism 5.

  FIG. 2 is an explanatory diagram of an apparatus configuration in which a reversing mechanism is provided in front of the first sticking mechanism according to the present invention. After the electrode body 2 is reversed, the pasting operation is performed at the insulating film pasting portion in the first pasting mechanism 5, and the electrode body re-reversing second roller 15 is disposed at a position lower than the first work stage 13. Thus, the second sticking mechanism 10 can be arranged at the same height as the first sticking mechanism 5. The method of conveying the electrode body and applying the insulating film is the same as that of the apparatus shown in FIG. 1, but FIG. 1 is provided with a reversing mechanism after the first applying mechanism, whereas FIG. A reversing mechanism is provided in front of.

  By disposing the first roller for reversing the electrode body or the second roller for reversing the electrode body at a position lower than the first work stage, the second pasting mechanism can be disposed at the same height as the first pasting mechanism. By arranging the first sticking mechanism and the second sticking mechanism at the same height, it becomes possible to move between work stages in a smooth and reasonable posture, and the work safety is high and the workability is good. An insulator sticking device is obtained.

  Examples of the present invention are described in detail below. The embodiment shown here exemplifies a device structure for embodying the technical idea of the present invention, and the present invention does not specify the device structure as follows.

Example 1
An insulator sticking apparatus will be described as a first embodiment of the present invention with reference to FIG. The size of the device is 7.5 m long, 4 m wide, and 2.8 m high.

The positive electrode body is made by mixing LiCoO ₂ which is a positive electrode active material, a conductive agent of carbon black, and a binder of polyvinylidene fluoride into N-methyl-2-pyrrolidone (hereinafter referred to as NMP) on an aluminum foil. A dispersion and a slurry were applied to the front surface and dried, and the back surface was similarly applied and dried. In the negative electrode body, carbon, which is a negative electrode active material that can be doped and dedoped with lithium, a carbon black conductive auxiliary agent, and a binder of polyvinylidene fluoride are mixed and dispersed in NMP on a copper foil to form a slurry. The coated product was dried after coating on the front surface, and the back surface was similarly dried after coating.

  The unwinding unit 1 has a motor for rotating the electrode body 2 and a function for correcting the winding deviation of the electrode body. The first dancer roller 3 is a vertically operable roller, and fixed rollers are arranged on the left and right sides of the first dancer roller 3. The first feed roller 4 has opposite rollers and is equipped with a drive motor on one side. The first sticking mechanism 5 has a function of pulling out an insulating film wound in a reel shape at right angles to the electrode body 2, a first positioning sensor 12 capable of detecting the coating end of the electrode body 2, and an insulating film at the coating end. And has a function of pressing the insulating film with a roller. The second dancer roller 6 has the same configuration as the first dancer roller 3. The electrode body reversing first roller 7 is disposed on the left side of the second dancer roller 6. The electrode body reversing third roller 9 is disposed on the electrode body reversing second roller 8 and can reversely transport the electrode body 2. The second feed roller 19 has the same configuration as the first electrode body feed roller 4. The first roller 14 for reversing the electrode body, the second roller 15 for reversing the electrode body, the third roller 16 for reversing the electrode body, and the fourth roller 17 for reversing the electrode body, Re-invert via the top of the. The winding unit 11 has a function of correcting a motor that rotates the electrode body 2 and winding deviation of the electrode body 2.

  Thereby, the insulating film could be stuck on both the front and back surfaces of the electrode body with one device, and an insulator sticking device with good workability was obtained.

(Example 2)
As an embodiment 2 of the present invention, an insulator sticking apparatus will be described with reference to FIG. The size of the device is 7.5 m in length, 4 m in width, and 2.3 m in height.

  The structure of the insulator pasting device is the same as that in FIG. 3. After the insulating film is pasted on the surface of the electrode body 2 by the first pasting mechanism 5, the electrode body 2 is reversed and the second pasting mechanism 10 Then, an insulating film was pasted on the back surface, and the electrode body 2 was reversed again.

  By disposing the first roller 7 for reversing the electrode body after the pasting operation is performed at the insulating film pasting portion in the first pasting mechanism 5 at a position lower than the first work stage 13, the second pasting mechanism 10. And the first pasting mechanism 5 could be arranged at the same height.

  By making the first sticking mechanism and the second sticking mechanism the same height, the movement between the work stages can be made smooth and the work can be performed in a comfortable posture, so the work safety is high and the workability is high. A good insulator pasting device was obtained.

(Example 3)
An insulator pasting apparatus will be described as Example 3 with reference to FIG. After reversing the electrode body 2 by the reversing mechanism, an insulating film is pasted on the back surface of the electrode body 2 by the first pasting mechanism 5, and then the electrode body 2 is reversed again and insulated by the second pasting mechanism 10. A film was attached.

  The method of conveying the electrode body and applying the insulating film is the same as in Example 2. In Example 2, the reversing mechanism is provided after the first attaching mechanism, whereas in Example 3, the first attaching mechanism is provided. A reversing mechanism is provided in front of. That is, in Example 2, the insulating film is first attached to the front surface, whereas in Example 3, the insulating film is first attached to the back surface.

  By making the first sticking mechanism and the second sticking mechanism the same height, the movement between the work stages can be performed smoothly and the work can be performed in a reasonable posture, so that the safety is high and the workability is good. An insulator pasting device was obtained.

  In addition, it can carry out also using the apparatus shown in FIG. 1 as a method of sticking an insulating film on the back surface first. That is, in the unwinding unit 1, the insulating film can be attached from the back surface by reversing the rotation direction of the motor and unwinding the electrode body 2 from the bottom instead of from above.

  From these examples, an insulating film was adhered to both the front and back surfaces of the electrode body with a single device, and an insulator pasting device with good workability was obtained.

  Also, by making the first sticking mechanism and the second sticking mechanism the same height, an insulating film is attached to both the front and back surfaces of the electrode body with a single device, so that the work safety is high and the workability is good. A sticking device was obtained.

  INDUSTRIAL APPLICABILITY The present invention can be applied to an insulator sticking apparatus with good workability by sticking an insulating film on both front and back surfaces of an electrode body with a single device.

Explanatory drawing of the apparatus structure which provided the inversion mechanism after the 1st sticking mechanism by this invention. Explanatory drawing of the apparatus structure which provided the inversion mechanism in front of the 1st sticking mechanism by this invention. Explanatory drawing of the apparatus structure from which the height of the 1st sticking mechanism by this invention differs from the 2nd sticking mechanism. Explanatory drawing of the apparatus structure which affixes an insulating film on the single side | surface of an electrode body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unwinding unit 2 Electrode body 3 1st dancer roller 4 1st feed roller 5 1st sticking mechanism 6 2nd dancer roller 7 1st roller for electrode body reversal 8 2nd roller for electrode body reversal 9 3rd for electrode body reversal Roller 10 Second sticking mechanism 11 Winding unit 12 First positioning sensor 13 First work stage 14 First roller 15 for reversing electrode body Second roller 16 for reversing electrode body 17 Third roller 17 for reversing electrode body Electrode body Fourth roller 18 for re-inversion Second positioning sensor 19 Second feed roller 20 Second work stage

Claims (2)

  In an insulator pasting device for pasting an insulating film on both sides perpendicular to the electrode winding direction at a desired position of an electrode body in which an electrode mixture layer is intermittently applied on a metal current collector, the surface of the electrode body is insulated. A first pasting mechanism for pasting a film, a dancer roller for adjusting the tension of the electrode body, a reversing mechanism for inverting the electrode body, a second pasting mechanism for pasting an insulating film on the back surface of the electrode body, An insulator sticking device having a re-inversion mechanism for inverting the electrode body again.   The insulator pasting apparatus according to claim 1, wherein the first pasting mechanism and the second pasting mechanism are located at the same height.

Images