JP2014149970A - Gel coating machine and device for manufacturing lithium ion secondary battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of eliminating a liquid injection step causing a high cost and the like, and inexpensively and efficiently manufacturing a lithium ion secondary battery using a gel-like electrolyte.SOLUTION: A gel coating machine 10 for interposing a gel-like electrolyte in at least any of a positive electrode plate 2, a negative electrode plate 4, and a separator 3 interposed between the positive electrode plate 2 and the negative electrode plate 4 comprises: a piping for transferring an electrolytic solution or the gel-like electrolyte; and a coating nozzle which is mounted on an edge side of the piping and arranges the gel-like electrolyte by coating the electrolytic solution or the gel-like electrolyte on a surface of the positive electrode plate 2, the negative electrode plate 4, or the separator 3. The coating nozzle is heatable.

Description

  The present invention relates to a gel coater and an apparatus for manufacturing a lithium ion secondary battery.

Conventionally, a lithium ion secondary battery has been manufactured by laminating a positive electrode plate and a negative electrode plate with a separator interposed between them and storing the laminate in a casing such as a laminate film, and then supplying an electrolyte solution in the casing. It is injected and sealed between a positive electrode plate and a negative electrode plate, and electrode terminals connected to the stacked positive electrode plate and negative electrode plate are projected from the case (for example, Patent Document 1 below) ).
The electrolytic solution is injected into the casing by placing the casing containing the laminate in a container called a chamber having a negative pressure inside and evacuating the casing.

JP 2010-102871 A

By the way, in recent years, there has been an increasing need for lithium ion secondary batteries as large capacity secondary batteries such as 5 kWh to 10 kWh stationary batteries for home use or 23.4 kWh in-vehicle batteries. It is getting bigger.
However, as described above, when the lithium ion secondary battery is manufactured by vacuuming the chamber and injecting the electrolytic solution, the chamber becomes larger as the cell becomes larger, and the vacuuming device becomes larger. Manufacturing equipment costs have been pushed up by the increase in production time, and since the injection time has been prolonged, the production efficiency has not been increased, making it difficult to widely provide inexpensive lithium ion secondary batteries.
Therefore, in view of the above problems, the present invention eliminates the liquid injection process, which is a factor of high cost, and can manufacture a lithium ion secondary battery inexpensively and efficiently using a gel electrolyte. It is an issue to provide.

The present invention provides a gel coating machine in which a gel electrolyte is interposed in at least one of a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate. A pipe for transferring the electrolyte, and an electrolyte solution or the gel electrolyte applied to the surface of at least one of the positive electrode plate, the negative electrode plate, or the separator. A coating nozzle for disposing an electrolyte, and the coating nozzle can be heated.
According to this configuration, the electrolyte can be disposed between the positive electrode plate and the negative electrode plate easily and in a short time by arranging the gel electrolyte in the lamination step of the positive electrode plate and the negative electrode plate. And in arranging gel electrolyte, it becomes possible to carry out temperature management appropriately until just before coating of electrolyte solution or gel electrolyte.

In the present invention, one or a plurality of tip openings of the coating nozzle extend so as to extend along a width of a region where the gel electrolyte is disposed on at least one of the positive electrode plate, the negative electrode plate, and the separator. It is preferable to be provided.
According to this configuration, since the electrolytic solution or the gel electrolyte can be applied in a strip shape from the opening at the tip, the gel electrolyte can be efficiently and uniformly arranged.

In the present invention, it is preferable that the coating nozzle includes a pressing portion that presses the surface of the positive electrode plate, the negative electrode plate, or the separator provided with a gel electrolyte.
According to this configuration, the coated gel electrolyte can be efficiently infiltrated into the positive electrode plate, the negative electrode plate, or the separator.

In the present invention, it is preferable that at least a part of the pipe can be heated.
According to this configuration, the temperature of the gel electrolyte can be more stably controlled.

An apparatus for manufacturing a lithium ion secondary battery includes the gel coater according to any one of claims 1 to 4.
According to this structure, the manufacturing apparatus of the lithium ion secondary battery which has an above-mentioned function can be used.

  According to the present invention, the electrolyte can be interposed between the positive electrode plate and the negative electrode plate easily and in a short time by arranging the gel electrolyte in the lamination step of the positive electrode plate and the negative electrode plate. Since the temperature of the liquid or gel electrolyte can be controlled until just before coating, and the gel electrolyte can be distributed uniformly, it is possible to manufacture a high-quality lithium ion secondary battery easily, in a short time. It has the effect of becoming.

It is the perspective view which showed typically the lithium ion secondary battery manufactured with the manufacturing apparatus of the lithium ion secondary battery provided with the gel coating machine shown as one Embodiment of this invention. It is the front view which showed the manufacturing apparatus of the lithium ion secondary battery provided with the gel coating machine shown as one Embodiment of this invention. It is the side view which showed the manufacturing apparatus of the lithium ion secondary battery provided with the gel coating machine shown as one Embodiment of this invention. It is the figure which showed the coating nozzle of the gel coating machine shown as one Embodiment of this invention, (a) is sectional drawing which looked at (b) by the XX line, (b) is a front view, (C) is the side view, and (d) is the bottom view. It is a principal part side view which shows the modification of the gel coating machine shown as one Embodiment of this invention.

One embodiment of the present invention A multilayer membrane electrode stack 1 shown in FIG. 1 manufactured using a lithium ion secondary battery manufacturing apparatus includes a positive electrode plate 2, a separator 3, and a negative electrode plate 4 stacked in this order. A gel electrolyte (not shown) is disposed between the positive electrode plate 2 and the negative electrode plate 4, and one end portions 2a, 2a,... Of a plurality of positive electrode plates 2, 2,. The terminal tab 5 is joined, and the terminal tabs 6 are joined by joining one end portions 4a, 4a,.
This multilayer membrane electrode assembly 1 is arranged in a housing 7 formed of a laminate film or the like, and becomes a laminated battery P such as a lithium ion secondary battery.

  As shown in FIGS. 1 and 2, the lithium ion secondary battery manufacturing apparatus 11 of this embodiment includes an electrode plate laminating apparatus 12 and a gel coating machine 10.

  The electrode plate laminating apparatus 12 includes a laminating stage 13, accommodating portions 14A and 14B for accommodating the laminated positive electrode plate 2 and negative electrode plate 4, holding arms 15A and 15B for the positive electrode plate 2 and the negative electrode plate 4, and holding arms 15A, A support plate 16 that supports 15B, and a separator interposing machine 17 (not shown in FIG. 3) that is interposed between the positive electrode plate 2 and the negative electrode plate 4 while folding the separator 3 are provided.

  The lamination stage 13 has a surface area on which the positive electrode plate 2 and the negative electrode plate 4 can be placed, and is a work table on which the positive electrode plate 2, the negative electrode plate 4 and the separator 3 are laminated. The stacking stage 13 is configured to be movable up and down, and is gradually lowered as the thickness of the stacked body 1a increases as the positive electrode plate 2, the separator 3 and the negative electrode plate 4 are stacked.

On both sides of the lamination stage 13, a positive electrode plate accommodating portion 14 </ b> A in which the flat plate surface of the sheet-like positive electrode plate 2 is stacked and accommodated in the vertical direction at positions separated from the lamination stage 13 by the same distance, and the positive electrode plate 2. In the same manner as described above, a negative electrode plate accommodating portion 14B accommodating the negative electrode plate 4 is provided.
In the positive electrode plate 2, for example, a positive electrode active material layer composed of a positive electrode slurry in which a positive electrode active material, a conductive auxiliary agent, and a binder serving as a binder are dispersed in a solvent is formed on both surfaces of the current collector. It is placed so as to overlap the accommodating portion 14A in a single-wafer state punched into a rectangular or other predetermined shape.
The negative electrode plate 4 is a negative electrode active material layer formed by using a negative electrode slurry in which a carbon material made of, for example, carbon powder or graphite powder and a binder such as polyvinylidene fluoride are dispersed in a solvent. However, it is formed on a current collector made of copper (Cu), and is placed on the accommodating portion 14B in a single-wafer state punched into a rectangular or other predetermined shape.

A pair of holding arms 15A and 15B are fixed to the support plate 16 so that the holding of the positive electrode plate 2 and the holding of the negative electrode plate 4 are symmetrical in the horizontal direction.
Between the holding arms 15A and 15B, when one holding arm 15A (15B) is arranged to face the accommodating portion 14A (14B) from above, the other holding arm 15B (15A) faces the stacking stage 13 from above. It is fixed to the support plate 16 at a distance that can be arranged. When one holding arm 15A is positioned above the accommodating portion 14A of the positive electrode plate 2 and holds the positive electrode plate 2, the other holding arm 15B is positioned above the stacking stage 13 and stacks the negative electrode plate 4. When the other holding arm 15B is positioned above the accommodating portion 14B of the negative electrode plate 4 and holds the negative electrode plate 4, the one holding arm 15A is positioned above the stacking stage 13 to hold the positive electrode plate 2 It can be stacked.

The separator interposing machine 17 includes a separator holding portion 19 that holds the middle in the extending direction of the strip-shaped separator 3 drawn from the roll 18. The separator holding portion 19 is disposed between the pair of holding arms 15A and 15B, reciprocates in the horizontal direction in synchronization with the horizontal movement of the holding arms 15A and 15B, and moves left and right while folding the separator 3, It is comprised so that it can fold so-called.
The separator 3 is formed using a nonwoven fabric or the like as a base material, and the material is not particularly limited, but cellulose, polyolefin resin (polypropylene, polyethylene, etc.), polyester resin, polyimide resin, or the like is used. . The separator 3 has a gap inside thereof, and allows the gel electrolyte to pass from one plate surface of the separator 3 to the other plate surface. In particular, in the case of a nonwoven fabric, when the porosity of the void portion is less than 40%, it becomes difficult to pass the gel electrolyte, and when it is 90% or more, the strength of the separator 3 becomes weak and the multilayer membrane electrode assembly 1 is produced. There is a risk of damage in the process. Therefore, the porosity of the separator 3 is 40% to 90%.

  The porosity of the separator 3 is the ratio of the volume of the void portion to the total volume of the separator 3, that is, “{1- (volume of the object constituting the separator) / (volume of the entire separator)} × 100”. means. The total volume of the separator 3 in this case is calculated using, for example, the surface area and thickness of the separator 3, or a predetermined area of the separator plate surface is cut out, and the area and thickness of the plate surface of the separator 3 thus cut out are calculated. What is necessary is just to calculate using a value, or you may calculate using the value of the weight per unit surface area of the separator 3 (g / m <2>). On the other hand, the volume of the object constituting the separator 3 (for example, in the case of a non-woven fabric, the fiber constituting the non-woven fabric) measures the weight of the cut-out separator 3 and measures, for example, Shimadzu AccuPick II 1340 It can be calculated by measuring the density of the cut-out separator 3 using a vessel and dividing the weight by the density. Here, the “volume of the entire separator” means an apparent volume determined by the outline (contour) of the separator 3.

Next, the gel coater 10 will be described.
As shown in FIG. 3, the gel coater 10 is attached to a pipe 21 for transferring an electrolytic solution or a gel-like electrolyte, and a tip side of the pipe 21, and the electrolyte or the gel-like electrolyte is placed on the lamination stage 13. A coating nozzle 22 that coats the three surfaces of the disposed separator and disposes a gel electrolyte is provided, and the coating nozzle 22 is configured to be heated.
As the pipe 21, a flexible pipe 21A and a metal pipe 21B extending linearly are provided. The metal pipe 21B is slidably supported on the guide rail 23, and can move forward and backward in the horizontal direction (arrow L1, L2 direction) together with the coating nozzle 22 fixed to the tip.

As shown in FIGS. 4A to 4D, the coating nozzle 22 is connected to a nozzle upper portion 26 formed in a substantially rectangular parallelepiped shape with a predetermined thickness and width dimension, and a lower surface of the nozzle upper portion 26, and is a rectangular parallelepiped. And a nozzle lower portion 28 in which the thickness of the shape wall portion is gradually reduced.
Inside the nozzle upper portion 26, a diffusion channel 24 extending from the electrolyte solution or gel electrolyte supply port S toward both ends in the width direction (arrow L3 direction), and a width communicating with the diffusion channel 24 below. A plurality of branch flow paths 25, 25,... Provided at substantially equal intervals in the direction (arrow L3 direction) are formed.
The nozzle lower portion 28 is formed with a groove-like long hole flow passage (tip opening portion) 27 that is formed at an intermediate portion in the thickness direction and communicates with all of the plurality of branch flow passages 25, 25. Has been.

The coating nozzle 22 transfers the electrolyte solution or the gel electrolyte through the diffusion channel 24, the branch channel 25, and the grooved long hole channel 27, thereby opening the front end of the long hole channel 27. The gel electrolyte is arranged from the portion 29 in a band shape along the width direction (arrow L3 direction). In addition, although the opening dimension of the long hole flow path 27 is not specifically limited, In this embodiment, it opens with the length dimension larger than the width dimension of the positive electrode plate 2 or the negative electrode plate 4 with respect to the moving direction of the coating nozzle 22. FIG.
A heating part K is provided on the peripheral walls of the flow paths 24, 25, and 27 of the coating nozzle 22, and the flow paths 24, 25, and 27 are set to a predetermined temperature (for example, 40 degrees to 100 degrees, desirably 60 degrees to 80 degrees). ) Can be heated. Since the temperature setting of the coating nozzle 22 is determined by the composition of the gel electrolyte to be used, the temperature is equal to or higher than the gel temperature of the gel electrolyte, and preferably the gel temperature + 10 ° C. or higher. However, when the temperature is excessively high, the viscosity of the gel electrolyte is lowered, which impairs the coatability. Therefore, it is necessary to adjust to an appropriate temperature range.

  As shown in FIG. 3, the gel coater 10 having the above-described configuration directs the pipe 21 </ b> B to a guide rail with the extending direction of the pipe 21 </ b> B oriented in a direction orthogonal to the direction between the holding nozzles 15 </ b> A and 15 </ b> B of the laminating apparatus 12. By sliding along 23, the coating nozzle 22 is disposed at a position where the coating nozzle 22 can advance onto the lamination stage 13 or retract from the lamination stage 13.

The gel electrolyte is, for example, a gel formed from a polymer matrix and a non-aqueous electrolyte (that is, a non-aqueous solvent and an electrolyte salt) to cause the surface to be sticky.
The gel electrolyte presses the negative electrode plate 4 when the positive electrode plate 2, the separator 3, and the negative electrode plate 4 are stacked in this order from the lower side and disposed between the plate surfaces of the separator 3 and the negative electrode plate 4, for example. In the separator 3 and between the plate surfaces of the separator 3 and the positive electrode plate 2, the viscosity that does not flow completely, that is, by pressing the negative electrode plate 4 from the surface, the gel electrolyte gradually becomes a separator. A viscosity that can permeate and reach the positive electrode plate 2 side and that can be applied on the separator 3 substantially uniformly is used. Specifically, when the viscosity of the gel electrolyte is 100 Pa · S or less, the gel electrolyte flows below the separator 3 and hardly remains between the separator 3 and the negative electrode plate 4. Therefore, the gel electrolyte cannot penetrate into the negative electrode active material layer above the separator 3. Moreover, when the viscosity of the gel electrolyte is 10000 Pa · S or more, the viscosity of the gel electrolyte is too high and cannot be applied uniformly on the active material layers of the positive electrode plate 2 and the negative electrode plate 4. Therefore, the viscosity of the gel electrolyte is set in the range of 100 Pa · S to 10000 Pa · S, and smooth and good penetration and robustness of the gel electrolyte into the positive electrode active material layer, the separator 3 and the negative electrode active material layer are achieved. When it is considered to have a thickness of 100 Pa · S to 5000 Pa · S, it is desirable. As described above, the viscosity of the gel electrolyte is dependent on temperature, so it is desirable to adjust it in an appropriate temperature range. Furthermore, since the gel electrolyte exhibits thixotropic properties, The fluidity varies depending on the pressure. Therefore, the electrolytic solution or the gel electrolyte needs to be set in an appropriate range.

  Further, the viscosity of the gel electrolyte is measured by using a rheometer (viscoelasticity measuring apparatus. Specifically, for example, rhe stress 600 manufactured by HAKE Co., Ltd.), and the temperature at which the fluidity of the polymer matrix can be secured (for example, 1 g of the gel electrolyte is heated with a copolymer of polyvinylidene fluoride and hexafluoropropylene (PVDF-HFP) as the polymer matrix (80 ° C.) to obtain a fluid state. The shear stress when a shear rate of 0.1 to 10 (1 / sec) is applied to the electrolyte is measured and can be calculated from the formula “shear stress = shear rate × viscosity”. When measuring the viscosity with a rheometer, the shear stress may vary depending on the physical properties and shear rate of the material, so it is possible to calculate the viscosity by looking at the change in shear stress by changing the shear rate. preferable. Then, when the shear stress (= viscosity) is substantially constant within the above range, the viscosity is determined, and when the shear stress changes, an average value may be calculated and used.

  Polymer matrices include polyvinylidene fluoride (PVDF), hexafluoropropylene copolymer (PVDF-HFP), polyacrylonitrile, alkylene ethers such as polyethylene oxide and polypropylene oxide, polyester, polyamine, polyphosphazene, and polysiloxane. Etc. are used.

  The non-aqueous solvent is a lactone compound such as γ-butyrolactone; a carbonic acid ester compound such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, or methyl ethyl carbonate; a carboxylic acid ester compound such as methyl formate, methyl acetate, or methyl propionate; Ether compounds such as tetrahydrofuran and dimethoxyethane; ether compounds such as tetrahydrofuran and dimethoxyethane; nitrile compounds such as acetonitrile; sulfone compounds such as sulfolane; amide compounds such as dimethylformamide; .

When the electrolyte is made into a gel electrolyte, it is prepared by mixing a nitrile compound such as acetonitrile; an ether compound such as tetrahydrofuran; an amide compound such as dimethylformamide, or a mixture of two or more.
The electrolyte salt is not particularly limited, and lithium salts such as lithium hexafluorophosphate, lithium perchlorate, and lithium tetrafluoroborate can be used.

Next, the manufacturing method of the multilayer membrane electrode assembly 1 shown in FIG. 1 using the gel coating machine 10 of the present embodiment will be described with reference to FIGS. In manufacturing the multilayer membrane electrode assembly 1, first, a sheet-like positive electrode plate 2 in which a positive electrode active material layer is formed on a current collector made of aluminum foil or the like is placed in the accommodating portion 14 </ b> A.
Moreover, the sheet-like negative electrode plate 4 in which the negative electrode active material layers 13 are formed on both surfaces of a current collector made of copper foil or the like is placed in the accommodating portion 14B.

  Then, the electrode plate stacking device 12 is used to hold the negative electrode plate 4 by the holding arm 15 </ b> B as indicated by a virtual line, and then the support plate 16 is moved onto the stacking stage 13. When the holding arms 15A and 15B are lowered to release the holding arm 15B and the negative electrode plate 4 is placed on the lamination stage 13, the positive electrode plate 2 is held by the holding arm 15A at the same time.

  Next, when the holding arms 15A and 15B are raised and the holding arm 15A holding the positive electrode plate 2 is moved upward of the stacking stage 13, the separator holding fixed to the support plate 16 between the holding arms 15A and 15B is held. The part 19 passes through the stacking stage 13 first in synchronization with the movement of the holding arms 15 </ b> A and 15 </ b> B, and the separator 3 sandwiched between the separator holding parts 19 covers the upper surface of the negative electrode plate 4.

Therefore, before the holding arm 15A is positioned on the lamination stage 13, the movement of the support plate 16 is stopped, the gel coating machine 10 is driven, the coating nozzle 22 is advanced onto the lamination stage 13, and the A gel electrolyte is disposed on the separator 3 positioned.
At this time, since the coating nozzle 22 has a width dimension larger than the width direction of the positive electrode plate 2 and the negative electrode plate 4, the separator 3 is included on the negative electrode plate 4 only by reciprocating the coating nozzle 22 once. A gel electrolyte can be disposed on the whole. Moreover, since the coating nozzle 22 has the heating part K and is heated, the electrolyte solution or the gel-like electrolyte that has reached the coating nozzle 22 can be brought to a desired temperature. It is uniformly distributed.
Then, after the coating nozzle 22 is retracted, the support plate 16 is further moved to the holding arm 15B side, and the holding arm 15A is moved onto the stacking stage 13.

  When the holding arm 15A is positioned on the stacking stage 13, the holding arms 15A and 15B are lowered to place the positive electrode plate 2 on the negative electrode plate 4 and the separator 3, and the negative electrode is held by the holding arm 15B as indicated by a virtual line. The plate 4 is held. When the holding arm 15B is moved again toward the stacking stage 13, the separator holding portion 19 that moves in synchronization with the holding arm 15B first passes through the stacking stage 13 and covers the separator 3 on the positive electrode plate 2. Thereafter, before the holding arm 15B is positioned on the stacking stage 13, the coating nozzle 22 is advanced onto the stacking stage 13 to apply the gel electrolyte.

  After coating the electrolyte solution or gel electrolyte with the coating nozzle 22, the coating nozzle 22 moves backward from the stacking stage 13, so the holding arm 15B is moved onto the stacking stage 13 and the negative electrode plate 4 is mounted. Put.

  By repeating the above operation, a laminated body 1a in which the negative electrode plate 4, the separator 3, the gel electrolyte, the positive electrode plate 2... Are laminated in this order is manufactured. The end portions 2a of the positive plates 2, 2... Of the body 1a are welded to connect the terminal tabs 5, and the end portions 4a of the negative plates 4, 4,. The membrane / electrode assembly 1 is prepared, and the multilayer membrane / electrode assembly 1 is sealed with a laminate film 7 or the like by projecting the terminal tabs to obtain a lithium ion secondary battery P.

  As described above, according to the lithium ion secondary battery manufacturing apparatus 11 provided with the gel coater 10, the gel electrolyte is arranged in the process of sequentially stacking the positive electrode plate 2, the separator 3, and the negative electrode plate 4. Therefore, as in the case of injecting the electrolyte into the housing, without using a chamber in which the inside of the laminate 1a is housed in the housing 7 such as a laminate film and the inside is in a negative pressure atmosphere, The lithium ion secondary battery P can be easily manufactured. Therefore, the production efficiency can be improved by omitting the liquid injection and the aging time, and the effect that the inexpensive lithium ion secondary battery P can be produced without using the chamber and the vacuuming equipment can be obtained.

  And when applying a gel electrolyte, appropriate temperature control is required, but according to the gel coating machine 10, the coating nozzle 22 is provided with the heating part K, and an electrolyte solution or a gel-like electrolyte is provided. Since it is possible to appropriately control the temperature of the electrolyte until immediately before the application of the electrolyte, it is possible to apply the electrolyte solution or the gel electrolyte to the separator 3 in a uniform and suitable manner to arrange the gel electrolyte. The effect that it becomes possible to manufacture the high quality lithium ion secondary battery P using a gel-like electrolyte is acquired.

Further, the gel coating machine 10 is configured such that the coating nozzle 22 has a width dimension larger than the width dimension of the positive electrode plate 2 and the negative electrode plate 4 to which the electrolytic solution or the gel-like electrolyte is applied, and is formed into a strip shape. Therefore, it is possible to apply a gel-like electrolyte to the laminated positive electrode plate 2, separator 3 or negative electrode plate 4 in an efficient and uniform thickness. It is done.
In particular, the electrolyte solution or the gel electrolyte can be filled evenly into the long hole channel 27 communicating with the plurality of branch channels 25, 25,. Therefore, according to the coating nozzle 22, there is an effect that it is possible to apply the electrolyte solution or the gel electrolyte with a uniform thickness from the long hole channel 27 and to easily distribute the gel electrolyte uniformly. can get.

  In addition, in said embodiment, although the gel coating machine 10 was installed in the electrode plate lamination apparatus 12, the application object of the gel coating machine 10 is not limited to the electrode plate lamination apparatus 12 mentioned above, For example, each positive electrode plate 2, separator 3, and negative electrode plate 4 wound in a roll shape are extended in a strip shape and conveyed in one direction, so that the operation of each process is continuously performed by so-called “Roll to Roll”. Can be effectively used for an apparatus capable of performing the above-described operation, and the same operations and effects as those of the above-described embodiment can be obtained.

In the above embodiment, the gel electrolyte 10 is disposed on the separator 3. However, the gel electrolyte 10 may be disposed on one or both of the positive electrode plate 2 and the negative electrode plate 4.
The coating nozzle 22 is more preferably provided with a pressing portion that presses the electrolytic solution or gel electrolyte applied to the surface of the positive electrode plate 2, the negative electrode plate 4 or the separator 3. In this case, the applied electrolyte solution or gel electrolyte is suitably infiltrated into the positive electrode plate 2, the negative electrode plate 4 and the separator 3 to dispose the gel electrolyte, thereby improving the performance of the lithium ion secondary battery P. Can be made.

Moreover, it is preferable that at least a part of the pipes 21A and 21B can be heated.
In this case, the temperature of the gel electrolyte can be controlled more stably.
Moreover, although the long hole flow path 27 provided in the coating nozzle 22 is one, it may be provided with two or more.

Furthermore, the gel coating machine 10 has a configuration in which the coating nozzle 22 is provided only at one end of the pipe 21B. However, as shown in FIG. 5, the coating nozzle 22 is provided at both ends of the pipe 21B. It is good also as a structure.
In this case, the electrode plate laminating apparatus 12 is arranged oppositely, and the piping 21B is moved at the timing when the electrolytic solution or the gel electrolyte is applied, so that the lithium ion secondary battery is used using the coating nozzles 22 and 22. Can be efficiently manufactured by a plurality of lines.
Moreover, also when manufacturing a laminated body on a turntable, the gel coating machine 10 which provided the coating nozzle 22 in the both ends of the piping 21B can be applied suitably.

DESCRIPTION OF SYMBOLS 1 Multilayer membrane electrode laminated body 2 Positive electrode plate 3 Separator 4 Negative electrode plate 10 Gel coating machine 11 Manufacturing apparatus 21 of lithium ion secondary battery 21 Pipe 22 Coating nozzle 27 Long hole flow path (tip opening)

Claims (5)

In a gel coating machine in which a gel electrolyte is interposed in at least one of a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate,
A pipe for transferring the electrolyte solution or the gel electrolyte, and attached to the tip side of the pipe, and the electrolyte solution or the gel electrolyte is attached to the surface of at least one of the positive electrode plate, the negative electrode plate, or the separator. A coating nozzle for coating and arranging the gel electrolyte;
The gel coating machine is characterized in that the coating nozzle can be heated.   One or more tip openings of the coating nozzle are provided so as to extend along the width of the region where the gel electrolyte is disposed on at least one of the positive electrode plate, the negative electrode plate, or the separator. The gel coater according to claim 1, wherein:   3. The gel coating according to claim 1, wherein the coating nozzle includes a pressing portion that presses a surface of the positive electrode plate, the negative electrode plate, or the separator provided with a gel electrolyte. Machine tool.   The gel coater according to any one of claims 1 to 3, wherein at least a part of the pipe is heatable. The manufacturing apparatus of the lithium ion secondary battery provided with the gel coating machine as described in any one of Claim 1 to 4.

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