KR20120117634A - Cutting method and cutting apparatus of laser transmission member and manufacturing method of electrode - Google Patents

Abstract

PURPOSE: A cutting method and device of laser-transmitting member are provided to easily cut material not easily cut by laser and to have excellent productivity by applying force two regions around a laser-irradiated part to cut the both regions. CONSTITUTION: A cutting method of laser-transmitting member comprises: an irradiation step irradiating laser to a laser-cutting member in a region where the laser-transmitting member is arranged; a cutting step cutting two regions by applying force to the two regions around a laser-irradiated part. A cutting device of laser-transmitting member comprises: an irradiation part irradiating laser to the laser-cutting member in the region where the laser-transmitting member is arranged; and a cutting part applying force and detaching the two regions from the laser-irradiated part.

Description

CUTTING METHOD AND CUTTING APPARATUS OF LASER TRANSMISSION MEMBER AND MANUFACTURING METHOD OF ELECTRODE}

The present invention relates to a method for cutting a laser transmitting member and a method for manufacturing a cutting device and an electrode.

Patent document 1 discloses the method of laser-cutting a raw material and manufacturing the electrode for lithium secondary batteries.

Japanese Patent Application Laid-Open No. 2002-289180

The present inventors also develop the method of manufacturing a battery electrode by laser cutting a raw material. And while the present inventors progressed development, it turned out that depending on the material of a raw material (cut material), it may not be able to cut well without any design.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and an object of the present invention is to cut a laser transmission member, a cutting device, and an electrode, which are capable of cutting even when a material which is not normally laser cut can be cut and have excellent mass productivity. It is to provide a manufacturing method.

This invention solves the said subject by the following solving means.

The present invention is a method of cutting a laser transmitting member provided in a laser cutable member. And an irradiation step of irradiating a laser to a laser cutable member in an area where the laser transmission member is provided, and a cutting step of applying a force to two areas that are unfolded with a trace irradiated by the laser in the irradiation step. Characterized in that.

According to the present invention, by applying a force to two areas spread by the laser-radiated trajectory between them, both areas can be separated and cut, and even a material that cannot be laser cut can be cut. Mass production is excellent.

EMBODIMENT OF THE INVENTION Embodiment of this invention and the advantage of this invention are described in detail below, referring an accompanying drawing.

1 illustrates a lithium ion secondary battery.
2 is a view for explaining an electrode manufacturing method excellent in mass productivity.
3 shows a cut line for manufacturing an electrode from an electrode material sheet.
4 is a map showing recommended conditions for laser irradiation.
5 is a diagram showing an outline of a laser transmitting member cutting device.
6 is a detailed view of a laser head.
7 is a view for explaining the structure and operation of the cutting table.
8 is an operation timing chart of a laser and a cutting board.
9 is a view for explaining the operation of the movable part of the cutting table.
10 is a diagram illustrating a cutting state in cut line II.

First, in order to facilitate understanding of the present invention, the technical concept of the inventors will be described.

1 is a view for explaining a lithium ion secondary battery, Figure 1 (A) is a perspective view showing the appearance of the cell pack of the lithium ion secondary battery, Figure 1 (B) is a unit housed in the cell pack Top view of the battery.

Here, a lithium ion secondary battery is taken as an example and demonstrated as a battery.

In the cell pack 10 of the lithium ion secondary battery, a unit cell 12 in which a predetermined number is stacked and electrically connected to the exterior material 11 is incorporated. In addition, the unit battery 12 is mentioned later with reference to FIG. Although not shown, a predetermined number of cell packs 10 of the lithium ion secondary battery are stacked and placed in a box (housing) made of aluminum or the like to form a lithium ion secondary battery package.

The packaging material 11 accommodates the stacked unit cells 12. Although the material of the exterior material 11 can be considered variously, For example, there exists a sheet | seat material of the polymer-metal composite laminated film which coat | covered aluminum with the polypropylene film. The packaging material 11 is first heat-sealed in three sides such that one side is opened while the stacked unit cells 12 are accommodated. After the electrolyte is injected, the remaining one side is also heat-sealed. The exterior material 11 is provided with the positive electrode tab 111a and the negative electrode tab 111b for taking out the electric power of the unit battery 12 to the outside.

One end of the positive electrode tab 111a is connected to the positive electrode current collector in the inside of the exterior member 11, and the other end thereof extends out of the exterior member 11.

One end of the negative electrode tab 111b is connected to the negative electrode current collector in the interior of the exterior member 11, and the other end thereof extends out of the exterior member 11.

As shown in FIG. 1B, the unit cell 12 includes a positive electrode 121a, a negative electrode 121b, and a separator 122.

The separator 122 is an electrolyte layer which holds a fluid electrolyte (electrolyte solution). The separator 122 is nonwoven fabric, such as a polyamide nonwoven fabric, a polyethylene nonwoven fabric, a polypropylene nonwoven fabric, a polyimide nonwoven fabric, a polyester nonwoven fabric, and an aramid nonwoven fabric. The separator 122 may be a microporous membrane film in which a film is stretched to form pores. Such a film is used as a separator for a conventional lithium ion battery. Moreover, you may laminate | stack polyethylene, a polypropylene, a polyimide film, or these. The thickness of the separator 122 is not particularly limited. However, the thinner side makes the battery compact. Therefore, it is preferable that the separator 122 be as thin as possible in the range which can ensure performance. Generally, the thickness of the separator 122 is about 10-100 micrometers. However, the thickness may not be constant.

The electrolyte (electrolyte) is, for example, a gel electrolyte in which an electrolyte solution is held in the polymer skeleton by about several percent by weight to about 99 percent by weight. In particular, a polymer gel electrolyte is preferable. The polymer gel electrolyte is, for example, a solid polymer electrolyte having ion conductivity, and contains an electrolyte solution usually used in lithium ion batteries. Moreover, what hold | maintained the electrolyte solution normally used in a lithium ion battery in the skeleton of the polymer which does not have lithium ion conductivity.

The polymer gel electrolyte may be other than 100% of the polymer electrolyte, and may contain an electrolyte solution in the polymer skeleton. In particular, the ratio (mass ratio) of the electrolyte solution and the polymer is preferably about 20:80 to 98: 2. If it is such a ratio, fluidity | liquidity by electrolyte and performance as electrolyte will be compatible.

The polymer backbone may be any of a thermosetting polymer and a thermoplastic polymer. Specifically, for example, polymer (PEO), polyacrylonitrile (PAN), polymethacrylic acid ester, polyvinylidene fluoride (PVDF), polyvinylidene fluoride and hexafluorine having polyethylene oxide in a main chain or side chain Copolymers of low propylene (PVDF-HFP), polymethyl methacrylate (PMMA), and the like. However, the present invention is not limited to these.

The electrolyte solution (electrolyte salt and plasticizer) contained in the polymer gel electrolyte is usually used in a lithium ion battery. For example, inorganic acid anion salts such as LiPF ₆ , LiBF ₄ , LiClO ₄ , LiAsF ₆ , LiTaF ₆ , LiAlCl ₄ , Li ₂ B ₁₀ Cl ₁₀ , LiCF ₃ SO ₃ , Li (CF ₃ SO ₂ ) ₂ N, Li a _{(C 2 F 5 SO 2)} 2 N and so on of the organic acid anion, and at least one of lithium salts selected from the salts containing the (electrolyte salt), and propylene carbonate, ring-like carbonate such as ethylene carbonate. Chain carbonates, such as dimethyl carbonate, methyl ethyl carbonate, and diethyl carbonate, may be sufficient. Ethers such as tetrahydrofuran, 2-methyltetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane and 1,2-dibutoxyethane may be used. Lactones, such as (gamma) -butyrolactone, may be sufficient. Nitriles, such as acetonitrile, may be sufficient. Ester, such as methyl propionate, may be sufficient. Amides, such as dimethylformamide, may be sufficient. The organic solvent (plasticizer), such as an aprotic solvent which mixed at least 1 sort (s) chosen from methyl acetate and methyl formate, may be used. However, it is not limited to these.

The positive electrode 121a has a positive electrode current collector foil and a positive electrode active material layer formed on both surfaces thereof. The positive electrode 121a is disposed on one surface of the separator 122 (the lower surface of the separator 122 in FIG. 1B).

The positive electrode current collector foil is, for example, a foil made of aluminum, copper, titanium, nickel, stainless steel (SUS), an alloy thereof, or the like. Although the thickness of a positive electrode collector foil is not specifically limited, Usually, it is about 1-100 micrometers.

The positive electrode active material of the positive electrode active material layer is particularly preferably a lithium-transition metal composite oxide. Specifically, for example, Li? Mn-based composite oxides such as spinel LiMn ₂ O ₄ and LiCoO ₂ Li-Co composite oxides, such as LiNiO ₂ Such as Li? A Ni-based composite oxide, such as LiFeO ₂ Li? Such as Fe-based composite oxide. In addition, LiFePO ₄ Phosphoric acid compounds and sulfuric acid compounds of transition metals, such as lithium, etc. may be sufficient. In addition, transition metal oxides or sulfides such as V ₂ O ₅ , MnO ₂ , TiS ₂ , MoS ₂ , and MoO ₃ may be used. Moreover, PbO2 _, AgO, NiOOH, etc. may be sufficient. Such a positive electrode active material can constitute a battery excellent in battery capacity and output characteristics.

The particle diameter of the positive electrode active material is good enough to be able to paste the positive electrode material into a film by spray coating or the like, but the smaller one can reduce the electrode resistance. Specifically, the average particle diameter of the positive electrode active material may be 0.1 to 10 µm.

In addition, the positive electrode active material may contain an electrolyte, a lithium salt, a conductive aid, or the like in order to increase ion conductivity. Examples of the conductive aid include acetylene black, carbon black, and graphite.

The compounding quantity of a positive electrode active material, electrolyte (preferably solid polymer electrolyte), a lithium salt, and a conductive support agent is set in consideration of the purpose of use of a battery (focusing on output, focusing on energy, etc.) and ion conductivity. For example, when the compounding quantity of electrolyte, especially a solid polymer electrolyte is too small, the ion conduction resistance and ion diffusion resistance in an active material layer will become large, and battery performance will fall. On the other hand, when the compounding quantity of electrolyte, especially a solid polymer electrolyte is too large, the energy density of a battery will fall. Therefore, in consideration of this, a specific compounding amount is set. The thickness of the positive electrode active material layer is not particularly limited. The purpose of use (output emphasis, energy importance, etc.), ion conductivity, etc. of a battery are considered and set. The thickness of a general positive electrode is about 1 to 500 mu m.

The negative electrode 121b has a negative electrode current collector foil and a negative electrode active material layer formed on both surfaces thereof. The negative electrode 121b is disposed on the other side of the separator 122 (upper surface of the separator 122 in FIG. 1B).

The negative electrode current collector foil may use the same one as the positive electrode current collector foil or may use a different one.

Specifically, the negative electrode active material of the negative electrode active material layer is a metal oxide, a lithium metal composite oxide metal, carbon, titanium oxide, a lithium-titanium composite oxide, or the like. In particular, carbon, transition metal oxides, and lithium-transition metal composite oxides are preferable. Especially, carbon or a lithium transition metal composite oxide can make a high battery capacity and high output battery. These may be used individually by 1 type and may be used together 2 or more types.

A predetermined number of such unit cells 12 are stacked, and each positive electrode current collector foil is assembled into one and electrically connected in parallel. This assembly part is a positive electrode collector part, and the positive electrode tab 111a is connected to this positive electrode collector part. Further, each negative electrode current collector foil is assembled into one and electrically connected in parallel. This assembly part is a negative electrode collector part, and the negative electrode tab 111b is connected to this negative electrode collector part.

Although the positive electrode 121a and the negative electrode 121b are arrange | positioned so that the separator 122 may be interposed, if the position shifts, there exists a possibility that the positive electrode 121a and the negative electrode 121b may short-circuit. In particular, the inventors have discovered that there is a risk of short circuiting at the portion A surrounded by a dashed line in FIG. 1B where the positive electrode 121a and the negative electrode 121b cross each other. Therefore, the inventors of the present invention have conceived of attaching an insulating adhesive tape to a region including at least part A of either electrode of the positive electrode 121a and the negative electrode 121b. In addition, since this insulating adhesive tape prevents the short circuit of the positive electrode 121a and the negative electrode 121b, it may be attached to either one and may be attached to both. In addition, in the following description, it does not specify as a positive electrode / negative electrode, but demonstrates as an electrode.

It is a figure explaining the electrode manufacturing method excellent in mass productivity.

In the course of studying various specific methods, the inventors have considered the method of manufacturing the electrode by cutting and irradiating a laser in a state where the insulating adhesive tape 1213 is attached to the electrode material sheet 1210 in consideration of mass productivity. Crazy On the other hand, in the electrode material sheet 1210, the electrode active material layer 1212 is formed in a predetermined region of the electrode current collector foil 1211. The insulating adhesive tape 1213 is a resin tape such as polypropylene (PP).

The state which attached the resin tape 1213 to the electrode raw material sheet 1210 is shown in FIG. As can be seen from FIG. 2B, an electrode active material layer 1212 is formed in a predetermined region of the electrode current collector foil 1211. The resin tape 1213 is attached over the electrode active material layer 1212 formed on the electrode current collector foil 1211 and the electrode current collector foil 1211 on which the electrode active material layer 1212 is not formed.

3 is a diagram showing a cut line for producing an electrode from an electrode material sheet.

As mentioned above, the inventors considered the method of manufacturing an electrode by irradiating and cutting a laser in the state which attached the resin tape 1213 to the electrode material sheet 1210 in consideration of mass productivity. The electrode material sheet 1210 with the resin tape 1213 is cut along the cut line indicated by a dashed line. In this manner, the desired electrode 121 can be manufactured by a method having excellent mass productivity.

However, since the resin tape 1213 transmits a laser, it was discovered by the present inventors that it cannot cut well without any design.

That is, since the resin tape 1213 which exists in the cut line I and the cut line II of FIG. 3 permeate | transmits a laser, it cannot cut without any design. The resin tape 1213 is not attached to the cut line III, and the electrode current collector foil 1211 is exposed. Therefore, about this, laser cut can be performed by a conventional method.

Thus, the inventors repeated various experiments, and, for the cut line I, a component contained in the electrode active material evaporated by irradiating a laser of a predetermined power density to the electrode active material layer 1212 having the resin tape 1213 attached thereto. It was found that the resin tape 1213 was cut by heat or pressure of the evaporated gas. On the other hand, about cut line II, as shown to FIG. 3 (B), the resin tape 1213 is affixed on the electrode current collector foil 1211 instead of the electrode active material layer 1212. FIG. Therefore, since the evaporation phenomenon of the electrode active material layer does not occur, the resin tape 1213 is not cut. However, it was found that the resin tape 1213 was also melted in several places and the strength was weakened by the heat of the electrode current collector foil 1211 when the laser was cut. In this state, the resin tape 1213 in the cut line II can be cut | disconnected by holding the electrode 121 and the surplus member 125 which sandwiched the cut line (laser irradiation trace), and removing both. However, if the amount of heat input from the laser is too small, the strength of the resin tape 1213 will not be weakened. Moreover, when the amount of heat input from a laser is too big | large, the electrode collector foil 1211 will be cut excessively. From this, the recommended condition map as shown in FIG. 4 was obtained. Using this FIG. 4, the output and cutting speed of a laser can be calculated | required from the intensity | strength which can remove the electrode 121 and the surplus member 125 which interposed the cut line (laser irradiation trace). Also, by irradiating a laser smaller than the predetermined power density with respect to the cut line I, the resin tape 1213 is melted in several places and the strength is weakened, but the state is not cut. In this state, it is also possible to cut the resin tape 1213 in the cut line I by holding the electrode 121 and the surplus member 125 which sandwiched the cut line (laser irradiation trace), and removing both.

Hereinafter, a laser transmitting member cutting device for implementing the technical idea will be described.

It is a figure which shows the outline | summary of the laser transmitting member cutting device.

The laser transmission member cutting device 20 includes a laser oscillation unit 21, a laser head 22, a laser head positioning unit 23, and a work carrier 24.

The laser oscillation unit 21 generates a laser. The laser is, for example, a laser having a wavelength of 1 µm. Such a laser can reduce the number of cutting chips generated when the electrode material sheet 1210 is cut. Therefore, cutting chips are less likely to remain inside the battery. Moreover, it can cut at high speed. Therefore, it is excellent in mass productivity. As the laser having a wavelength of 1 µm, there are a YAG laser and a fiber laser. More specifically, there is a wavelength 1.07 mu m single mode fiber laser.

The laser head 22 is connected to the laser oscillation part 21 through the fiber cable 261. The laser head 22 fires a laser. The laser head 22 is also connected to the gas supply portion 25 through the gas tube 262. The electromagnetic valve 263 is provided in the middle of the gas tube 262, and can supply or stop gas supply. Other details of the laser head 22 will be described later.

The laser head positioning unit 23 supports the laser head 22 and moves the laser head 22 in the front-rear direction (X direction) and the left-right direction (Y direction).

The workpiece conveyance stand 24 conveys the electrode material sheet 1210 to a predetermined position, and holds the electrode material sheet 1210 so that the position does not shift during laser cutting. Specifically, the work conveying stand 24 includes a sheet conveying conveyor 241, a cutting table 242, and an electrode conveying conveyor 243.

The sheet conveying conveyor 241 is a belt conveyor which loads and conveys the electrode raw material sheet 1210.

The cutting table 242 sucks the electrode material sheet 1210 conveyed by the sheet conveying conveyor 241, and hold | maintains so that a position may not shift. In this state, the laser head 22 irradiates a laser to the electrode material sheet 1210. The cutting table 242 also includes a fixing portion 2421 and a movable portion 2422. Both the fixed part 2421 and the movable part 2422 are provided with the air suction port. The operation of the movable portion 2422 will be described later.

The electrode conveyance conveyor 243 is a belt conveyor which loads and conveys the electrode 121 cut | disconnected from the electrode raw material sheet 1210 in the cutting stand 242.

6 is a detailed view of the laser head.

The laser head 22 has a fiber connector at the end 221. The fiber cable 261 is connected to this fiber connector. The laser head 22 introduces the laser from the fiber connector. The tip 222 of the laser head 22 is a nozzle chip. The tip diameter of the nozzle chip is, for example, φ 0.8 to 1.5 mm. The laser head 22 irradiates a laser from a nozzle chip. The laser head 22 also includes a gas blowing portion 223. The gas tube 262 is connected to this gas blowing part 223. The laser head 22 takes in the gas supplied from the gas supply part 25 from the gas injection part 223. This gas is injected coaxially with the laser from the tip end of the nozzle chip. The laser head 22 also includes a camera 224. The camera 224 is for positioning the tip end of the nozzle chip.

It is a figure explaining the structure and operation | movement of a cutting board.

As described above, the cutting table 242 includes a fixing portion 2421 and a movable portion 2422.

The air suction port 2421a is provided in the fixing part 2421 along the external shape of the electrode 121 cut out from the electrode material sheet 1210.

In the movable part 2422, the air suction port 2422a is provided in the area | region in which the surplus member 125 removed from the electrode raw material sheet 1210 is mounted. Moreover, the movable part 2422 descend | falls from a horizontal state centering on the pivot 2422b which an axial direction is an X-axis direction (front-back direction).

8 is an operation timing chart of the laser and the cutting table.

In addition, this timing chart is only for demonstrating the back and forth relationship of the operation | movement of each part, and does not represent a fixed time even if it is a fixed space | interval of a horizontal axis.

The laser is stopped until timing t1. In addition, the fixed part 2421 has stopped air suction. In addition, the movable part 2422 stops air suction, and is in a descending state. In this state, the sheet conveying conveyor 241 conveys the electrode material sheet 1210. Since the movable part 2422 is in the lowered state, it is easy to convey the electrode material sheet 1210.

When the electrode material sheet 1210 reaches timing t1 at which the predetermined position is reached, the fixed portion 2421 and the movable portion 2422 start air suction. And when timing t2 is reached, the movable part 2422 will be in a horizontal state. As a result, the electrode material sheet 1210 is held so as not to cause displacement.

When timing t3 is reached, laser irradiation is started. Further, timing t3 to timing t4 represent laser irradiation along cut line I. FIG. Timing t4 to timing t5 represent laser irradiation along cut line II. Timing t5 to timing t6 represent laser irradiation along cut line III. In addition, this process is an irradiation process (# 101), and is shown by (A-1) and (A-2) of FIG.

When timing t7 is reached, the fixed part 2421 stops air suction.

When the timing t8 is reached, the movable portion 2422 is lowered. As a result, the surplus member 125 is pulled from the electrode material sheet 1210 and torn. In addition, this process is a cutting process # 102, and is shown by (B-1) and (B-2) of FIG.

When the timing t9 is reached, the movable portion 2422 stops air suction. As a result, the surplus member 125 is disposed away from the movable portion 2422 and disposed downward. This step is a disposal step # 103, and is shown in Figs. 9 (C-1) and (C-2).

It is a figure explaining the cutting | disconnection state in cut line II. Moreover, the upper side is a top view, and the lower side is a longitudinal cross-sectional view.

As shown in FIG. 10A, when the laser L is irradiated to the electrode material sheet 1210 along the cut line II, the laser beam passes through the resin tape 1213 to the electrode current collector foil 1211. Is absorbed.

Then, as shown in FIG. 10B, the electrode current collector foil 1211 is cut. At this time, the resin tape 1213 receives heat from the electrode current collector foil 1211 and rises in temperature to be partially cut, but a portion is not cut in a crosslinked state.

However, since the strength is lowered, as shown in FIG. 10C, when the excess member 125 is removed, the excess member 125 is cut off as shown in FIG. 10D. . When the cutting is completed, the resin tape 1213 shrinks and returns to the original, so that the cut surface does not become excessively contaminated.

The resin tape which permeates a laser cannot be laser cut. In this embodiment, a laser is irradiated to the electrode material sheet 1210 with a resin tape. Then, the resin tape 1213 receives heat from the electrode material sheet 1210 and the temperature rises. However, if the amount of heat generated is small, the resin tape 1213 is partially cut, but a place where the cut is not cut in a crosslinked state occurs. In particular, in the metal foil such as the electrode current collector foil 1211 of the electrode material sheet 1210, the amount of generated heat is small because the degree of absorption of the laser is small. Therefore, the resin tape 1213 attached to it is hard to be cut off. Therefore, in this embodiment, the electrode 121 and the surplus member 125 which sandwiched the cut line (laser irradiation trace) in the state which remained without being cut | disconnected in the bridge | crosslinked state were hold | maintained, and both were removed. In this way, the resin tape 1213 can be cut. Thus, according to this embodiment, even the resin tape which permeate | transmits a laser and cannot laser cut can be cut | disconnected. And since a resin tape can be used, it is excellent in mass productivity.

Moreover, the component contained in an electrode active material evaporates by irradiating the electrode active material layer 1212 with the resin tape 1213 with a predetermined | prescribed power density, and the resin tape 1213 by the heat or pressure of this evaporation gas, etc. Is cut, but when irradiated with a laser smaller than that, the resin tape 1213 is melted in several places, and the strength is weakened, but the cutting is not performed. In such a state, the resin tape 1213 can also be cut by holding the electrode 121 and the surplus member 125 sandwiched between the cut lines (laser irradiation traces) and removing the two.

In addition, since the electrode material sheet 1210 is cut after irradiating a laser without moving the electrode material sheet 1210, the process can be prevented from unnecessarily lengthening. Moreover, when conveying immediately after laser irradiation, there exists a possibility that the remainder which is not cut | disconnected may become over a conveyance by carrying out surrounding equipment, but according to this embodiment, such an abnormality also does not arise. Thus, unnecessarily lengthening of a line and abnormal conveyance can be avoided, and equipment cost can be reduced.

In addition, since the unnecessary surplus member is disposed of without pulling the electrode material sheet 1210 after pulling and cutting, it is not necessary to install a disposal mechanism separately, thereby reducing the equipment cost and providing a line tact time. Can improve.

Moreover, although the electrode material sheet 1210 is hold | maintained by air suction, such equipment can use other equipment, and it does not raise the cost of equipment.

In addition, when removing the surplus member 125, it can reliably cut | disconnect by rotating or sliding.

In addition, according to the present embodiment, since the resin tape does not need to be made of a special material, and a general purpose laser is usually used, it is possible to directly increase the material cost due to the change of the member, and the quality of the cut is degraded. However, it can avoid that processing time increases.

As mentioned above, although embodiment of this invention was described, the said embodiment only showed a part of application example of this invention, and it is not the intention to limit the technical scope of this invention to the specific structure of the said embodiment.

For example, in the said description, although the movable part 2422 of the cutting stand was made to rotate and descend from a horizontal state centering on the pivot 2422b whose axial direction is the X-axis direction (front-back direction), you may raise it. . Moreover, the axial direction of a pivot may be Y-axis direction (left-right direction), or the Z-axis direction (up-down direction) may be sufficient. In addition, the movable part 2422 of a cutting stand may slide back and forth, right and left, or up and down (parallel movement).

In addition, in the said description, although the fixing | fixed part 2421 and the movable part 2422 hold | maintain and hold | maintain the electrode raw material sheet 1210, you may hold | maintain by holding.

In addition, in the said description, although the resin tape 1213 was affixed on the upper and lower surfaces of the electrode raw material sheet 1210, you may adhere to either surface.

10: cell pack of lithium ion secondary battery
11: exterior material
12 unit battery
121: electrode (121a: positive electrode, 121b: negative electrode)
1210: Electrode Material Sheet
1211: electrode current collector foil
1212: electrode active material layer
1213: insulating adhesive tape (resin tape; resin member)
122: separator
125: surplus member
20: laser transmission member cutting device
21: laser oscillation unit
22: laser head
23: Laser head positioning unit
24: work carrier
241: sheet conveying conveyor
242: cutting table
2421: fixed part
2422: moving parts
243: electrode conveying conveyor
# 101: investigation process
# 102: cutting process
# 103: Disposal Process

Claims (8)

A method of cutting a laser transmitting member provided in a laser cutable member, the method comprising: irradiating a laser to a laser cutable member in an area where the laser transmitting member is provided, and a trace irradiated with a laser in the irradiation step. And a cutting step of applying a force to the two areas to be unfolded and to be unrolled. The method of claim 1, wherein the laser transmitting member is a resin member,
The said cutting process is a laser beam transmission member cutting method which, after a laser is irradiated in the said irradiation process, hold | maintains the said 2 area | regions, and removes it by applying a force. The method of cutting a laser transmitting member according to claim 2, further comprising a disposal step of discarding the unnecessary area by stopping holding of one unnecessary area among the two areas after cutting in the cutting step. The laser cutting member cutting method according to any one of claims 1 to 3, wherein the cutting step is detached by rotating or sliding the two regions while holding the two regions. It is a method of manufacturing an electrode from the electrode material sheet in which the laser transmission member was formed,
And a cutting step of irradiating a laser to the electrode material sheet in the area where the laser transmitting member is formed, and a cutting step of applying force to two areas that are unfolded with the trace irradiated by the laser in the irradiation step. , Electrode manufacturing method. The electrode electrode sheet according to claim 5, wherein the electrode material sheet is provided with an electrode active material layer in a predetermined region of the electrode current collector foil, and the laser transmitting member is an insulating adhesive tape and has no electrode active material layer formed thereon. It is affixed on foil, The said laser is a manufacturing method of the electrode of the wavelength of 1 micrometer. The said electrode material sheet is an electrode active material layer formed in the predetermined area | region of an electrode collector foil, The said laser permeable member is an insulating adhesive tape, The said electrode raw material sheet adheres to the electrode active material layer formed in the said electrode collector foil. And the laser is a laser having a wavelength of 1 µm. An apparatus for cutting a laser transmitting member provided in a laser cutable member, the apparatus comprising: an irradiation unit for irradiating a laser to a laser cutable member in an area where the laser transmitting member is provided, and two regions spread between the traces irradiated with the laser. Laser cutting member cutting apparatus provided with the cutting part which apply | stretches and removes a force.

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