JP2016195985A - Coating apparatus and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating apparatus and a coating method which can reduce unevenness of a thickness of a coating material layer.SOLUTION: A coating apparatus includes a support roll 55 which conveys a band-like metal foil 16, a coating part 50 which coats the band-like metal foil 16 with an active material slurry 51 to form an active material layer 17, a control part which identifies a shape of the active material layer 17, a second temperature-controlling part 60 which controls a temperature of the active material layer 17. The control part controls the second temperature-controlling part 60 so as to reduce a difference between thicknesses of end parts 17a, 17b of the active material layer 17 and thicknesses of other parts of the active material layer 17 based on an identification result by itself.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a coating apparatus and a coating method for coating a coating material on a strip-shaped substrate.

  Conventionally, secondary batteries such as lithium ion secondary batteries and nickel metal hydride secondary batteries are EV (Electric Vehicle), PHV (Plug in Hybrid Vehicle), etc. as power storage devices for storing electric power used in electrical components. Is mounted on the vehicle. The secondary battery includes an electrode housed in a case, and the electrode includes a metal foil and an active material layer formed by applying a slurry containing an active material to the metal foil.

  For example, Patent Document 1 discloses a coating apparatus including a coating roll and a backup roll having a built-in temperature adjustment unit. In the coating apparatus disclosed in Patent Document 1, the viscosity of the coating material is adjusted by heating the coating material (electrode paste). Thereby, it is suppressed that the thickness of the edge part of a coating material layer becomes thicker than the other part in a coating material layer.

JP 2015-16433 A

However, for the purpose of further improving the quality of the secondary battery, it is expected to further reduce the unevenness of the coating material layer thickness.
The present invention has been made paying attention to such problems existing in the prior art, and an object of the present invention is to provide a coating apparatus and a coating method capable of reducing the non-uniform thickness of the coating material layer. It is to provide.

  A coating apparatus that solves the above-mentioned problems identifies a conveyance unit that conveys a belt-shaped substrate, an application unit that applies a coating material to the substrate to form a coating layer, and a shape of the coating layer And a temperature control unit for adjusting the temperature of the coating material, and the thickness of the end portion in the coating material layer and the thickness of the other part in the coating material layer based on the result of identification by the identification unit The gist of the invention is that it includes a control unit that controls the temperature adjustment unit so that the difference in thickness is reduced.

  According to this, based on the result of identification by the identification unit, the temperature adjustment unit reduces the difference between the thickness of the end of the coating material layer and the thickness of the other part of the coating material layer. The temperature is adjusted. Here, when the temperature of the coating material increases, the viscosity of the coating material decreases, and as a result, the thickness of the end of the coating material layer decreases. Further, when the temperature of the coating material decreases, the viscosity of the coating material increases, and as a result, the thickness of the end of the coating material layer increases. Therefore, it can reduce that the thickness of a coating material layer becomes non-uniform | heterogenous.

  About the said coating device, the said temperature control part contains the temperature control part provided in the downstream of the said application part in the conveyance direction of the said base material, The temperature control part provided in the downstream of the said application part is the said, It is preferable to adjust the temperature of the coating material forming the coating material layer.

  According to this, based on the result of identifying the shape of the coating material layer, the temperature of the coating material already forming the coating material layer is directly adjusted. That is, by directly adjusting the viscosity of the coating material, the uneven thickness of the coating material layer can be quickly reduced.

  About the said coating device, the said temperature control part contains the temperature control part provided in the upstream of the said application part in the conveyance direction of the said base material, The temperature control part provided in the upstream of the said application part is the said, It is preferable to adjust the temperature of the coating material applied to the substrate by adjusting the temperature of the substrate.

  According to this, the temperature of a coating material is indirectly adjusted by adjusting the temperature of the base material before apply | coating a coating material based on the result which identified the shape of the coating material layer. That is, by adjusting the viscosity of the coating material indirectly, the unevenness of the thickness of the coating material layer can be reduced.

About the said coating device, it is preferable that the said identification part identifies the shape of the both ends in the width direction of the said base material.
According to this, since the coating material is applied while transporting the base material, the thickness of both end portions in the width direction of the base material tends to be uneven. On the other hand, since the temperature control part is controlled based on the result of identifying the shape of both ends in the width direction of the base material, the uneven thickness of the coating material layer is efficiently reduced.

  In addition, the coating method for solving the above problems includes a step of applying a coating material by a coating unit to form a coating material layer on a belt-shaped substrate transported by a transporting unit, and the coating layer by an identification unit The step of recognizing the shape and the temperature control unit is controlled based on the result of identification by the identification unit, and the difference between the thickness of the end portion in the coating material layer and the thickness of the other portion in the coating material layer is And a step of adjusting the temperature of the coating material so as to be small.

  According to this, based on the result of identification by the identification unit, the temperature adjustment unit reduces the difference between the thickness of the end of the coating material layer and the thickness of the other part of the coating material layer. The temperature is adjusted. Therefore, it can reduce that the thickness of a coating material layer becomes non-uniform | heterogenous.

  According to this invention, it can reduce that the thickness of a coating material layer becomes non-uniform | heterogenous.

The perspective view which shows an electrode typically. The front view which shows the manufacturing apparatus of an electrode typically. The perspective view which shows a part of manufacturing apparatus of an electrode typically. The block diagram which shows the electric constitution of the manufacturing apparatus of an electrode. (A)-(d) is a schematic diagram which shows the shape of an active material layer.

Hereinafter, an embodiment of a coating apparatus and a coating method will be described.
As shown in FIG. 1, the secondary battery as a power storage device is, for example, a lithium ion secondary battery. The secondary battery includes an electrode assembly, an electrolytic solution, and a case containing the electrode assembly and the electrolytic solution. The electrode assembly has a structure in which a plurality of electrodes 11 are layered in a state of being insulated from each other.

  The electrode 11 has a sheet-like metal foil 12. The metal foil 12 for the positive electrode is, for example, an aluminum foil. The metal foil 12 for the negative electrode is, for example, a copper foil. The electrode 11 has an active material layer 13 that covers both surfaces 12 a and 12 b of the metal foil 12. The active material layer 13 includes an active material for each polarity, a binder, a conductive aid, and the like. Further, the electrode 11 has a tab 14 protruding from the edge of the metal foil 12.

  As shown in FIG. 2, the manufacturing apparatus 20 as a coating apparatus is used in the process of manufacturing the strip electrode 15. The electrode 11 of this embodiment is manufactured by punching the strip electrode 15. The strip electrode 15 manufactured by using the manufacturing apparatus 20 may be either a positive electrode or a negative electrode. The strip electrode 15 of this embodiment includes a strip metal foil 16 as a strip substrate and an active material layer 17 covering both surfaces of the strip metal foil 16. The strip-shaped metal foil 16 has a first surface 16a and a second surface 16b opposite to the first surface 16a.

  The manufacturing apparatus 20 of this embodiment is an apparatus that forms an active material layer 17 on one side of a strip-shaped metal foil 16. For this reason, the strip | belt-shaped metal foil 16 which has the active material layer 17 on the single side | surface is obtained by supplying the strip | belt-shaped metal foil 16 which does not have the active material layer 17 to the manufacturing apparatus 20. FIG. Then, by supplying the strip metal foil 16 to the manufacturing apparatus 20 again, the strip electrode 15 having the active material layers 17 on both surfaces is obtained.

  The manufacturing apparatus 20 includes a supply unit 30 that supplies the strip-shaped metal foil 16. The supply unit 30 includes a holder 31 that supports the band-shaped metal foil 16 wound in a roll shape. The holder 31 sends the strip-shaped metal foil 16 in accordance with the conveyance speed of the strip-shaped metal foil 16.

  As shown in FIG. 3, the manufacturing apparatus 20 includes a first imaging unit 91 that captures a thermal image of the strip-shaped metal foil 16. The first imaging unit 91 is a CCD camera that can image in the infrared wavelength region, for example. The first imaging unit 91 captures a thermal image of a region straddling the entire band-shaped metal foil 16 in the width direction D2. The width direction D2 is a direction orthogonal to the transport direction D1 in the plane of the strip-shaped metal foil 16.

  The manufacturing apparatus 20 includes a first temperature control unit 40 that controls the temperature of the strip-shaped metal foil 16. The first temperature adjustment unit 40 adjusts the temperature of the coating material applied to the band-shaped metal foil 16 by adjusting the temperature of the band-shaped metal foil 16. A coating material here is an active material slurry mentioned later. The first temperature adjustment unit 40 is provided close to the downstream of the imaging region of the first imaging unit 91 in the transport direction D1.

  The first temperature adjustment unit 40 includes a first Peltier element group 41 facing the first surface 16 a of the strip-shaped metal foil 16. The first Peltier element group 41 includes a plurality of Peltier elements 41 a to 41 e arranged in parallel along the width direction D <b> 2 of the strip-shaped metal foil 16.

  The first temperature adjustment unit 40 has a second Peltier element group 42 that faces the second surface 16 b of the strip-shaped metal foil 16. The second Peltier element group 42 includes a plurality of Peltier elements 42 a to 42 e arranged in parallel along the width direction D <b> 2 of the strip-shaped metal foil 16.

  The opposing surfaces of the plurality of Peltier elements 41a to 41e and 42a to 42e that are respectively in contact with the strip-shaped metal foil 16 are either heat absorption surfaces or heat generation surfaces by individually controlling energization of the Peltier elements.

  The Peltier elements 41a and 42a are disposed corresponding to a portion of the strip-shaped metal foil 16 where the end portion 17a of the active material layer 17 is located in the width direction D2. The Peltier elements 41e and 42e are arranged corresponding to a portion of the strip-shaped metal foil 16 where the end portion 17b of the active material layer 17 is located in the width direction D2. The Peltier elements 41b to 41d and 42b to 42d are arranged corresponding to portions of the strip-shaped metal foil 16 other than the portions where the end portions 17a and 17b of the active material layer 17 are located.

  The manufacturing apparatus 20 includes an application unit 50 that applies the active material slurry 51 as a coating material to the band-shaped metal foil 16 to form the active material layer 17. The application unit 50 is provided downstream of the first temperature adjustment unit 40 in the transport direction D1.

  The application unit 50 is attached to a storage unit 52 for storing the active material slurry 51, an application roll 53 to which the active material slurry 51 stored in the storage unit 52 is attached, and an outer peripheral surface of the application roll 53. A comma roll 54 that adjusts the thickness of the active material slurry 51 and a support roll 55 that contacts the coating roll 53 while transporting the belt-shaped metal foil 16. In this embodiment, the support roll 55 becomes a conveyance part which conveys the strip | belt-shaped metal foil 16 along a longitudinal direction.

  The rolls 53 and 55 are supported so that their respective axes are parallel to each other and can rotate around the axes. The rotation direction D3 of the coating roll 53 is opposite to the rotation direction D4 of the support roll 55. The application unit 50 continuously applies the active material slurry 51 to the band-shaped metal foil 16 to form a continuous band-shaped active material layer 17.

  The manufacturing apparatus 20 includes a light projecting unit 93 that projects light L1 onto the active material layer 17. The light L1 may be, for example, laser light or light that has passed through a slit. The light projection area LA of the light L1 has a linear shape extending along the width direction D2 of the strip-shaped metal foil 16. The light projection angle θ formed by the active material layer 17 and the light L1 is less than 90 °.

  The light projecting area LA extends over the entire range in which the active material layer 17 is formed in at least the width direction D <b> 2 of the strip-shaped metal foil 16. The light projection area LA may straddle the entire band-shaped metal foil 16 in the width direction D2. The light projecting area LA is an area of the strip-shaped metal foil 16 that is close to the downstream of the application unit 50 in the transport direction D1.

  The manufacturing apparatus 20 includes a second imaging unit 92 that images the light L1 projected on the active material layer 17. The second imaging unit 92 is a CCD camera that can image in the visible wavelength region, for example. The second imaging unit 92 images an area including at least the entire area overlapping with the active material layer 17 in the light projection area LA. The second imaging unit 92 images from a direction perpendicular to the second surface 16 b of the strip-shaped metal foil 16.

  The manufacturing apparatus 20 includes a second temperature adjustment unit 60 that adjusts the temperature of the active material layer 17. That is, the second temperature adjusting unit 60 adjusts the temperature of the active material slurry 51 forming the active material layer 17. The second temperature adjustment unit 60 is provided close to the downstream of the light projection area LA in the transport direction D1.

  The second temperature adjustment unit 60 includes a third Peltier element group 61 that faces the first surface 16 a of the strip-shaped metal foil 16. The third Peltier element group 61 includes a plurality of Peltier elements 61 a to 61 e arranged in parallel along the width direction D <b> 2 of the strip-shaped metal foil 16.

  The second temperature adjustment unit 60 includes a fourth Peltier element group 62 facing the second surface 16 b of the strip-shaped metal foil 16. The fourth Peltier element group 62 includes a plurality of Peltier elements 62 a to 62 e arranged in parallel along the width direction D <b> 2 of the strip-shaped metal foil 16.

  The opposing surfaces of the plurality of Peltier elements 61a to 61e and 62a to 62e facing the strip-shaped metal foil 16 are either heat absorbing surfaces or heat generating surfaces by individually controlling the current supplied to the Peltier elements.

  The Peltier elements 61 a and 62 a are arranged corresponding to the end portion 17 a of the active material layer 17. The Peltier elements 61e and 62e are disposed corresponding to the end portion 17b of the active material layer 17. The Peltier elements 61b to 61d and 62b to 62d are arranged corresponding to portions of the active material layer 17 other than the end portions 17a and 17b.

  As shown in FIG. 2, the manufacturing apparatus 20 includes a drying unit 70 that dries the active material layer 17. The drying unit 70 is provided downstream of the second temperature adjustment unit 60 in the transport direction D1. The drying unit 70 includes a drying furnace 71 in which heated gas is circulated. The solvent contained in the active material layer 17 evaporates while passing through the drying furnace 71. As a result, the active material layer 17 is dried.

The manufacturing apparatus 20 includes a winding unit 80 that winds the strip-shaped metal foil 16 having the active material layer 17 into a roll shape. The winding unit 80 is provided downstream of the drying unit 70 in the transport direction D1.
As shown in FIG. 4, the manufacturing apparatus 20 includes a control unit 100. The control unit 100 includes a calculation unit that executes calculation processing, and a storage unit that stores a program of the calculation unit and calculation results.

  The control unit 100 is connected to a plurality of Peltier elements 41a to 41e, 42a to 42e, 61a to 61e, and 62a to 62e so as to be able to control energization of these elements. The control unit 100 is connected to the application unit 50 so that a control signal can be output.

  The control unit 100 is connected to the first imaging unit 91 so that image data captured by the first imaging unit 91 can be input. The control unit 100 is connected to the second imaging unit 92 so that data of an image captured by the second imaging unit 92 can be input. The control unit 100 is connected to the light projecting unit 93 so that the light projecting from the light projecting unit 93 can be controlled.

  The storage unit of the control unit 100 stores comparison data for identifying the shape of the active material layer 17 by comparing with the image data captured by the second imaging unit 92. The comparison data is image data when the second imaging unit 92 images an abnormally shaped active material layer 17 that has been prepared in advance by a test.

  As shown in FIG. 5A, the normal active material layer 17 has a shape in which both end portions 17a and 17b have the same or substantially the same thickness as other portions in the active material layer 17. This shape is a shape in which the thickness of the active material layer 17 is uniform.

  As shown in FIG. 5B, the abnormal active material layer 17 has a first shape in which the thickness of both end portions 17 a and 17 b is thicker than the thickness of other portions in the active material layer 17. This shape is a high end shape.

  As shown in FIG. 5C, the abnormal active material layer 17 has a second shape in which the thickness of both end portions 17 a and 17 b is thinner than the thickness of other portions in the active material layer 17. This shape is a thin shape.

  As shown in FIG. 5D, the abnormal active material layer 17 has a third shape different from the shape of the active material layer 17 shown in FIGS. . The storage unit of the control unit 100 stores a plurality of pieces of comparison data indicating the shapes of the active material layers 17 classified into the normal shape, the first shape, and the second shape, respectively.

And the control part 100 performs control demonstrated below.
When the power of the manufacturing apparatus 20 is turned on, the control unit 100 controls the coating unit 50 so as to form the active material layer 17 while transporting the strip-shaped metal foil 16. That is, a step (formation step) of forming the active material layer 17 by applying the active material slurry 51 to the strip-shaped metal foil 16 conveyed by the support roll 55 by the application unit 50 is performed. Along with this, a step of drying the active material layer 17 by the drying unit 70 (drying step) is performed. Further, the winding unit 80 performs a step of winding the strip-shaped metal foil 16 having the active material layer 17 (winding step).

  The control unit 100 identifies the shapes of the end portions 17a and 17b of the active material layer 17 by comparing the image data input from the second imaging unit 92 with the comparison data stored in the storage unit. That is, the control unit 100 performs a step of identifying the shape of the active material layer 17 (identification step). Therefore, in this embodiment, the control unit 100 serves as an identification unit that identifies the shape of the active material layer 17.

  When the control unit 100 identifies that the shape of the active material layer 17 is the first shape, the control unit 100 controls the Peltier elements 61a to 61e and 62a to 62e so that the active material layer 17 is heated. That is, the control unit 100 increases the temperature of the active material slurry 51 forming the active material layer 17. When the temperature of the active material slurry 51 rises, the viscosity of the active material slurry 51 decreases. For this reason, the active material slurry 51 forming the active material layer 17 flows so as to spread in the width direction D2. As a result, the thickness of the end portions 17a and 17b of the active material layer 17 is reduced.

  Moreover, the control part 100 controls the Peltier elements 61a-61e and 62a-62e so that the active material layer 17 may be cooled, when identifying the shape of the active material layer 17 as the 2nd shape. That is, the control unit 100 reduces the temperature of the active material slurry 51 forming the active material layer 17. When the temperature of the active material slurry 51 decreases, the viscosity of the active material slurry 51 increases. For this reason, the active material slurry 51 forming the active material layer 17 becomes difficult to flow so as to spread in the width direction D2. As a result, the thickness of the end portions 17a and 17b of the active material layer 17 is increased.

  Thus, the control part 100 identifies the shape of the both ends 17a and 17b in the width direction D2 continuously. Based on the result of identification by itself, the control unit 100 reduces the second temperature so that the difference between the thickness of the end portions 17a and 17b in the active material layer 17 and the thickness of the other portions in the active material layer 17 becomes small. It becomes a control part which controls the adjustment part 60 continuously. And the 2nd temperature control part 60 is controlled based on the identification result by the control part 100, and the difference of the thickness of the edge parts 17a and 17b in the active material layer 17 and the thickness of the other part in the active material layer 17 is A step of adjusting the temperature of the active material slurry 51 (temperature adjustment step) is performed so as to decrease the temperature.

  When the control unit 100 identifies that the shape of the active material layer 17 is a normal shape, a third shape that does not match any of the first shape and the second shape, by stopping the transport of the strip-shaped metal foil 16, The application unit 50 is controlled so as to stop the formation of the active material layer 17. In this case, the control unit 100 may control a notification device (not shown) so as to perform a predetermined notification.

  Further, the control unit 100 identifies the temperature distribution of the strip-shaped metal foil 16 in the width direction D2 based on the image data input from the first imaging unit 91. The control unit 100 controls the Peltier elements 41a to 41e and 42a to 42e so that the temperature of the strip-shaped metal foil 16 becomes a predetermined temperature and is uniform in the width direction D2. That is, a step of making the temperature of the strip-shaped metal foil 16 uniform to a predetermined temperature (preliminary temperature adjustment step) is performed.

  And the sheet-like electrode 11 is obtained by punching the strip electrode 15 manufactured by the manufacturing apparatus 20 into a predetermined shape. Next, the electrode assembly is manufactured by alternately laminating the positive electrode 11 and the negative electrode 11 with a separator interposed therebetween. Next, the electrode assembly and the electrolytic solution are accommodated in the case, whereby the secondary battery is completed.

Therefore, according to this embodiment, the following effects can be obtained.
(1) Based on the identification result by the control unit 100, the second temperature is set so that the difference between the thicknesses of the end portions 17a and 17b in the active material layer 17 and the thicknesses of the other portions in the active material layer 17 becomes small. The temperature of the active material slurry 51 is adjusted by the adjusting unit 60. Therefore, the non-uniform thickness of the active material layer 17 can be reduced.

  (2) The 2nd temperature control part 60 is provided downstream of the application part 50 in the conveyance direction D1. Therefore, the temperature of the active material slurry 51 that has already formed the active material layer 17 is directly adjusted based on the result of identifying the shape of the active material layer 17. That is, by directly adjusting the viscosity of the active material slurry 51, the uneven thickness of the active material layer 17 is quickly reduced.

  (3) The control unit 100 identifies the shapes of both end portions 17a and 17b in the width direction D2. In this embodiment, since the active material slurry 51 is applied while transporting the belt-shaped metal foil 16, the thicknesses of the both end portions 17a and 17b in the width direction D2 are likely to be non-uniform. On the other hand, since the 2nd temperature control part 60 is controlled based on the result which identified the shape of the both ends 17a and 17b in the width direction D2, the nonuniformity of the thickness of the active material layer 17 is efficiently Reduced.

  (4) The controller 100 preliminarily adjusts the temperature of the band-shaped metal foil 16 based on the result of identifying the temperature distribution of the band-shaped metal foil 16. Therefore, it is possible to suppress the thickness of the active material layer 17 from being uneven due to the uneven temperature of the strip-shaped metal foil 16.

  (5) The second temperature adjustment unit 60 includes Peltier elements 61a to 61e and 62a to 62e. Therefore, the viscosity of the active material slurry 51 can be kept appropriate by heating and cooling.

In addition, you may change embodiment as follows.
(Circle) the control part 100 does not need to perform one control among the control at the time of identifying with a 1st shape, and the control at the time of identifying with a 2nd shape.

  O The control part 100 is the Peltier element 61a-61e, and the Peltier elements 61a-61e, so that the active material slurry 51 may become different temperature by the edge part 17a and the edge part 17b according to the thickness of the edge part 17a and the thickness of the edge part 17b. You may control 62a-62e separately. According to this, the temperature of the active material slurry 51 can be adjusted appropriately according to the shape of the active material layer 17.

  The control unit 100 determines that the difference between the thicknesses of the end portions 17a and 17b in the active material layer 17 and the thicknesses of the other portions in the active material layer 17 is small based on the result of identification by itself. The temperature adjustment unit 40 may be controlled. In this case, the second temperature adjustment unit 60 may be omitted.

  The control unit 100 may identify the shape of the active material layer 17 by a method different from the method of comparing the image data and the comparison data. For example, the control unit 100 extracts the light projection area LA from the captured image. The control unit 100 calculates the area of the extracted light projection area LA that protrudes from the light projection area LA when the shape of the active material layer 17 is normal. And the control part 100 can also identify the shape of the active material layer 17 based on the calculated area and the direction which protrudes in the conveyance direction D1.

  O The moire method may be employed for identifying the shape of the active material layer 17. In this case, the light projecting unit 93 includes a lattice, and the lattice includes a plurality of light transmitting portions that are linear and parallel to each other. Light that has passed through the lattice is projected onto the active material layer 17. And the control part 100 may identify the shape of the active material layer 17 by processing the data of the image imaged with the 2nd imaging part 92 by the moire topography method.

  The application unit 50 may have a temperature control unit for the storage unit 52 that controls the temperature of the active material slurry 51 stored in the storage unit 52, and has a temperature control unit for the rolls 53 and 55. It may be. Based on the result of identification by itself, the control unit 100 reduces the temperature so that the difference between the thicknesses of the end portions 17a and 17b in the active material layer 17 and the thicknesses of the other portions in the active material layer 17 becomes small. The tuning unit may be controlled.

The control unit 100 may identify one of the two end portions 17a and 17b.
(Circle) the temperature control parts 40 and 60 may have a single Peltier device. Moreover, the temperature control parts 40 and 60 may have 2-4 pieces or 6 or more Peltier elements.

The temperature control units 40 and 60 may include a temperature control pipe through which the heat exchange medium is circulated, a heating wire, and an electromagnetic induction heating device in addition to or instead of the Peltier element.
O The temperature control parts 40 and 60 should just do at least one among heating and cooling.

  The manufacturing apparatus 20 may be an apparatus that intermittently forms the active material layer 17 by applying the active material slurry 51 to the strip-shaped metal foil 16 intermittently. In this case, the control unit 100 may identify the shapes of both end portions of the active material layer 17 in the transport direction D1.

  The manufacturing apparatus 20 may be an apparatus that forms the active material layer 17 on both surfaces of the strip-shaped metal foil 16 at one time. In this case, the manufacturing apparatus 20 may include a light projecting unit 93 that projects the light L1 onto the first surface 16a of the strip-shaped metal foil 16, and a second image capturing unit 92 that captures the light projecting area LA. .

O The manufacturing apparatus 20 may have conveyance parts, such as a roll and an ultrasonic conveyance apparatus, separately from the support roll 55. FIG.
○ The coating method applied to the manufacturing apparatus 20 may be a slit die method.

  (Circle) the coating material applied with the manufacturing apparatus 20 may be the ceramic slurry containing an insulating ceramic particle, a binder, and a solvent. That is, the manufacturing apparatus 20 may be an apparatus that forms an insulating layer as a coating material layer that covers the active material layer 17, for example.

  The manufacturing apparatus 20 may include a press unit that sandwiches and presses the strip electrode 15 with a pair of rolls, and a processing unit that punches the strip electrode 15 into the shape of the electrode 11. In addition, the manufacturing apparatus 20 may include an inspection unit that inspects the strip electrode 15.

The temperature adjustment using the second temperature adjustment unit 60 may be performed by an operator.
○ It can also be applied to power storage devices other than secondary batteries, such as capacitors.
○ The secondary battery is not limited to being mounted on a vehicle, but may be a stationary battery used in a house or the like.

The technical idea shown below can be grasped from the above embodiment and other examples.
(A) The base material may be a metal foil, and the coating material may be an active material slurry containing an active material and a solvent.

(B) When the thickness of the end portion is the first shape thicker than the thickness of the other part of the coating material layer, the control unit controls the temperature adjusting unit so that the temperature of the coating material is increased. Control
When the thickness of the end portion is the second shape thinner than the thickness of the other part of the coating material layer, the temperature control unit may be controlled so that the temperature of the coating material is lowered.

  D1 ... conveying direction, D2 ... width direction, 16 ... strip-shaped metal foil (base material, metal foil), 17 ... active material layer, 17a, 17b ... end, 40 ... first temperature control part (temperature control part), 50 Application unit 51 Active material slurry (coating material) 55 Support roll (conveying unit) 60 Second temperature control unit (temperature control unit) 100 Control unit (identification unit)

Claims (5)

A transport unit for transporting a belt-shaped substrate;
An application part for applying a coating material to form a coating material layer on the base material,
An identification unit for identifying the shape of the coating material layer;
A temperature control unit for adjusting the temperature of the coating material;
A control unit that controls the temperature adjustment unit so that a difference between the thickness of the end portion in the coating material layer and the thickness of the other part in the coating material layer becomes small based on the result of identification by the identification unit. And a coating apparatus comprising:   The temperature control unit includes a temperature control unit provided downstream of the application unit in the transport direction of the base material, and the temperature control unit provided downstream of the application unit forms the coating material layer. The coating apparatus of Claim 1 which adjusts the temperature of the coating material currently applied.   The temperature control unit includes a temperature control unit provided upstream of the coating unit in the transport direction of the base material, and the temperature control unit provided upstream of the coating unit controls the temperature of the base material. The coating apparatus of Claim 1 or Claim 2 which adjusts the temperature of the coating material apply | coated to this base material by adjusting.   The said identification part is a coating device as described in any one of Claims 1-3 which identifies the shape of the both ends in the width direction of the said base material. A step of applying a coating material by an application unit to form a coating material layer on a band-shaped substrate being conveyed by the conveyance unit;
A step of identifying the shape of the coating material layer by an identification unit;
The temperature control unit is controlled based on the result of identification by the identification unit, and the coating material is made so that the difference between the thickness of the end portion in the coating material layer and the thickness of the other portion in the coating material layer becomes small. Adjusting the temperature of the coating method.