Roller pressing device, pressing processing method and solid battery

Abstract

The problem to be solved by the present invention is to suppress end breakage of the pressed component. A roller pressing device (100) has a roller (30) for pressing the pressed component (M). The roller (30) has: a first roller portion (31) that presses the pressed component (M) radially; and a second roller portion (32) that protrudes radially further than the first roller portion (31) on each side closer to the axial length direction of the roller (30) than the first roller portion (31), and abuts against the pressed component (M) from the axial length direction side. The second roller portion (32) has an elastic member (E2) at least in the portion abutting against the pressed component (M).

Description

Technical Field

[0001] This invention relates to a roller pressing device for pressing a component. Background Technology

[0002] In recent years, secondary batteries have been developed from the perspective of mitigating adverse environmental impacts. One type of secondary battery is the solid-state battery, which has a solid electrolyte between the positive and negative electrodes. For the electrodes of a stationary battery, densification (high density) is required to reduce the resistance at the interface between the electrode and the solid electrolyte.

[0003] [Previous Technical Documents]

[0004] (Patent Documents)

[0005] Patent Document 1: Japanese Patent Publication No. 2012-530843 Summary of the Invention

[0006] [The problem the invention aims to solve]

[0007] From the viewpoint of mass production of this electrode, the inventors investigated the densification of a plate-shaped electrode by pressing it using a roller pressing device (e.g., Patent Document 1). However, when pressing in this way, it is possible for cracks (edge ​​cracks) to occur at the ends of the plate-shaped electrode in the width direction. Furthermore, the same problem may occur when pressing objects other than plate-shaped electrodes.

[0008] The present invention was made in view of the above circumstances, and its purpose is to suppress the end breakage of the pressed component.

[0009] [Technical means to solve the problem]

[0010] The inventors focused on the fact that if the pressed part is pressed in the radial direction of the roller and also pressed with a moderate load in the axial direction, it is less likely to cause end breakage in the pressed part, and thus completed the present invention. The present invention is the roller pressing apparatus of (1) to (12), the pressing processing method of (13) to (16), and the solid battery of (17).

[0011] (1) A roller pressing device, comprising rollers for pressing components.

[0012] The aforementioned roller has: a first roller portion that presses the aforementioned pressed member in the radial direction of the aforementioned roller; and a second roller portion that protrudes further in the radial direction than the aforementioned first roller portion on each side closer to the axial length direction of the aforementioned roller, and abuts against the aforementioned pressed member from the axial length direction side.

[0013] The aforementioned second roller has an elastic component at least in the portion that abuts against the aforementioned pressed component.

[0014] According to the invention described in (1) above, when the pressed component is pressed radially using the first roller, the pressed component can also be pressed axially using the second roller. Furthermore, since the second roller uses an elastic member to press the pressed component axially, it is easy to apply a suitable pressing load to the pressed component in the axial direction. That is, for example, it is considered that if the dimensional error of the pressed component is large, the error between the pressing load applied to the pressed component in the axial direction and the intended load will also increase. In this respect, if an elastic member is used, the error with the intended load can be suppressed. Therefore, it is easy to apply a suitable pressing load to the pressed component in the axial direction. As a result, when the pressed component is pressed radially using the roller, it is also easy to apply a suitable pressing load in the axial direction, thereby suppressing end breakage of the pressed component.

[0015] (2) The roller pressing device according to (1) above, wherein it has another roller pressing the pressed part from the opposite side of the aforementioned roller.

[0016] The aforementioned other roller has a third roller section opposite to the aforementioned first roller section, and an interference avoidance section opposite to the aforementioned second roller section.

[0017] Compared to the outer peripheral surface of the aforementioned third roller section, the outer peripheral surface of the aforementioned interference avoidance section is located radially inside the aforementioned other roller.

[0018] The aforementioned second roller protrudes further radially inward than the aforementioned third roller's outer peripheral surface.

[0019] According to the invention described in (2) above, compared to the case where the second roller portion only protrudes to the outer peripheral surface of the third roller portion, the contact area between the second roller portion and the pressed component is increased. As a result, end breakage of the pressed component can be suppressed more efficiently.

[0020] (3) The roller pressing device according to (1) or (2) above, wherein the elastic member has a heat-resistant part with a higher heat resistance temperature than other parts in the portion including the surface that abuts against the pressed member.

[0021] According to the invention described in (3) above, when the pressed part is pressed in a heated state, the heat-resistant part can be used to suppress damage to the elastic part.

[0022] (4) The roller pressing device according to any one of (1) to (3) above, wherein the coefficient of friction between the elastic member and the pressed member is 0.5 or less.

[0023] In the invention described in (1) above, since the roller has a second roller section, the pressed part may be more easily pulled in the rotation direction of the roller compared to the case without a second roller section. In this respect, according to the invention described in (4) above, since the coefficient of friction between the elastic member and the pressed part is 0.5 or less, this disadvantage can be suppressed.

[0024] (5) The roller pressing apparatus according to any one of (1) to (4) above, wherein the elastic member has a modified part in the part that abuts against the pressed member.

[0025] (6) The roller pressing apparatus according to (5) above, wherein the modified part is formed by fluorine coating the surface of the elastic member.

[0026] According to the invention described in (5) above, the modified portion can be used to improve heat resistance and durability. According to the invention described in (6) above, the modified portion can be formed using fluorine coating.

[0027] (7) The roller pressing device according to any one of (1) to (6) above, wherein the aforementioned elastic member has a plurality of elastic bodies with different elastic moduli.

[0028] According to the invention described in (7) above, it is possible to appropriately implement measures such as: using an elastomer with relatively high durability and heat resistance in the part of the elastic member that directly abuts against the pressed member, and using an elastomer with relatively low durability and heat resistance in other parts. Therefore, costs will be reduced.

[0029] (8) The roller pressing device according to (7) above, wherein at least one of the aforementioned elastomers is acrylic rubber, fluororubber and silicone rubber.

[0030] According to the invention described in (8) above, the invention described in (7) above can be implemented using elastomers of these materials.

[0031] (9) The roller pressing apparatus according to any one of (1) to (8) above, wherein the portion of the roller containing the elastic member is installed in a manner that is detachable relative to the other portions of the roller.

[0032] According to the invention described above (9), even if the elastic component is exhausted, it is not necessary to replace the entire roller; it is sufficient to replace only the part of the roller containing the elastic component, thus reducing costs.

[0033] (10) The roller pressing apparatus according to any one of (1) to (9) above, wherein the aforementioned elastic member is a second elastic member, and the aforementioned first roller portion has a first elastic member at least in the portion that abuts against the aforementioned pressed member.

[0034] According to the invention described above (10), a moderate pressing load can be easily applied not only in the axial direction of the roller but also in the radial direction.

[0035] (11) According to the roller pressing device described in (10) above, the elastic modulus of the first elastic component and the elastic modulus of the second elastic component are different from each other.

[0036] According to the invention described in (11) above, even in the case where the required flexibility in the radial direction and the required flexibility in the axial direction are different in roller pressing, it can be addressed by making the elastic modulus of the first elastic member different from that of the second elastic member.

[0037] (12) The roller pressing device according to any one of (1) to (11) above, wherein the pressed component is a plate electrode.

[0038] For the purpose of reducing resistance, plate electrodes (especially plate electrodes for solid-state batteries) require densification and mass production. In this regard, according to the inventions mentioned above (12) and (13), densified plate electrodes can be mass-produced using a roller pressing device.

[0039] (13) A pressing process using a roller pressing device, said roller pressing device having rollers for pressing the part being pressed.

[0040] The aforementioned roller has: a first roller portion that presses the aforementioned pressed member in the radial direction of the aforementioned roller; and a second roller portion that protrudes further in the radial direction than the aforementioned first roller portion on each side closer to the axial length direction of the aforementioned roller, and abuts against the aforementioned pressed member from the axial length direction side.

[0041] The aforementioned second roller portion has an elastic component at least in the portion that abuts against the aforementioned pressed component.

[0042] The pressing process includes a pressing step, in which the first roller presses the component in the radial direction while the second roller presses the component in the axial direction.

[0043] According to the invention described above (13), the pressed part can be pressed by the first roller and the second roller to suppress end breakage.

[0044] (14) The pressing process method described in (13) above, wherein a pressing component heating step is included to heat the pressed component.

[0045] In the aforementioned pressing process, the aforementioned pressed component, which has been heated by the aforementioned pressed component heating process, is pressed.

[0046] According to the invention described above (14), the pressed component can be densified efficiently by pressing the softened component after heating.

[0047] (15) The pressing process according to (13) or (14) above, wherein a roller heating step is included to heat the aforementioned roller.

[0048] In the aforementioned pressing process, the aforementioned roller, heated by the aforementioned roller heating process, is used to press the aforementioned pressed component.

[0049] According to the invention described above (15), for example, when the pressed part has been heated, the heat of the pressed part can be prevented from being taken away by the roller. In addition, for example, when the pressed part has not been heated, the pressed part can be heated and softened by the heated roller while being pressed.

[0050] (16) The pressing process according to any one of (13) to (15) above, wherein the pressed component is a plate electrode.

[0051] According to the invention (pressing process method) mentioned above (16), the same effect as the invention (roller pressing device) mentioned above (12) can be obtained.

[0052] (17) A solid battery having the aforementioned plate-shaped electrode pressed by the roller pressing device described in (12) above, and a solid electrolyte abutting against the aforementioned plate-shaped electrode.

[0053] According to the invention described above (17), since the plate electrode is densified, the resistance of the interface between the plate electrode and the solid electrolyte can be reduced. Moreover, the end breakage of the plate electrode can also be suppressed.

[0054] (The effect of the invention)

[0055] As described above, according to the present invention, by pressing the pressed component in the radial direction of the roller and also applying a moderate load in the axial direction, the end breakage of the pressed component can be suppressed. Attached Figure Description

[0056] Figure 1 This is a perspective view illustrating the roller pressing device of the first embodiment.

[0057] Figure 2 This is a front view of the roller pressing device.

[0058] Figure 3This is a front view of the roller pressing device for a comparative example.

[0059] Figure 4 This is a perspective view of a modified roller pressing device.

[0060] Figure 5 This is a schematic diagram illustrating a solid-state battery using the plate-shaped electrode manufactured in the first embodiment. Detailed Implementation

[0061] Next, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the structure of the following embodiments, and can be implemented with appropriate modifications without departing from the spirit of the invention.

[0062] [First Implementation Method]

[0063] Figure 1 This is a perspective view illustrating the roller pressing apparatus 100 of this embodiment. The roller pressing apparatus 100 has, in the vertical direction, an upper roller 30, which presses the pressed component M from above; and a lower roller 40, which presses the pressed component M from below. The pressed component M is... Figure 5 The schematic diagram shows the plate-shaped electrodes (positive plate Mp, negative plate Mn) of the solid-state battery 200. Figure 1 The roller pressing device 100 shown has a power unit (not shown) for rotating the upper roller 30 and the lower roller 40, and a control unit (not shown) for controlling the power unit. The roller speed of the roller pressing device 100 is about 100 m / min to 200 m / min.

[0064] The upper roller 30 has an upper journal 39, a first roller portion 31, and two second roller portions 32. The first roller portion 31 and the two second roller portions 32 are mounted on the upper journal 39 and rotate integrally with the upper journal 39. The first roller portion 31 protrudes radially outward from the upper journal 39. The second roller portions 32 protrude radially outward more than the first roller portion 31 on one side and the other side further along the axial length direction than the first roller portion 31.

[0065] The lower roller 40 has a lower journal 49, a third roller portion 43, and two interference avoidance portions 42. The third roller portion 43 is mounted on the lower journal 49 and rotates integrally with the lower journal 49. The third roller portion 43 protrudes radially outward from the lower journal 49 and is opposite to the first roller portion 31. The length of the third roller portion 43 in the axial direction is approximately equal to the length of the first roller portion 31 in the axial direction.

[0066] An interference avoidance part 42 is formed or mounted on the lower journal 49 and rotates integrally with the lower journal 49. The interference avoidance part 42 is opposite to the second roller part 32. The outer peripheral surface of the interference avoidance part 42 is located radially inward than the outer peripheral surface of the third roller part 43. By utilizing this interference avoidance part 42, the outer peripheral surface of the second roller part 32 protrudes to a position radially inward of the lower roller 40 than the outer peripheral surface of the third roller part 43. That is, the lower end of the outer peripheral surface of the second roller part 32 protrudes to a position lower than the upper end of the outer peripheral surface of the third roller part 43.

[0067] The first roller 31 is a roller that presses the pressed component M downwards in its radial outward direction, and the third roller 43 is a roller that presses the pressed component M upwards in its radial outward direction. By means of these first rollers 31 and third rollers 43, the pressed component M is pressed inwards in the thickness direction (inwards in the vertical direction).

[0068] When the first roller 31 and the third roller 43 press the pressed part M inward in the thickness direction, the two second rollers 32 abut against the pressed part M from both sides in the width direction (both sides in the axial length direction of rollers 30 and 40). The pressed part M is pressed inward in the width direction by these two second rollers 32.

[0069] Next, the specific structures of the first to third roller sections 31, 32, and 43 will be described. The first roller section 31 and the third roller section 43 can be constructed entirely of metal or the like, or they can be... Figure 1 As shown, each roller has elastic members E1 and E3 at least in the portion that abuts against the pressed member M (i.e., the outer peripheral surface). In the latter case, the first roller portion 31 and the third roller portion 43 may be, for example, only the outer peripheral surface and its periphery may be composed of elastic members E1 and E3, or the entire roller portion may be composed of elastic members E1 and E3.

[0070] Each second roller portion 32 has an elastic member E2 at least in the portion of its side surface including the side of the pressed member M. Specifically, each second roller portion 32 can be as follows: Figure 1 As shown, the whole is composed of elastic component E2, or only the side surface and its surrounding area of ​​the pressed component M are composed of elastic component E2.

[0071] Hereinafter, the elastic member E1 in the case where the first roller portion 31 has an elastic member E1 will be referred to as "first elastic member E1", the elastic member E2 in the second roller portion 32 will be referred to as "second elastic member E2", and the elastic member E3 in the case where the third roller portion 43 has an elastic member E3 will be referred to as "third elastic member E3". Examples of materials for the first to third elastic members E1 to E3 include acrylic rubber, fluororubber, and silicone rubber. More specifically, αGEL (registered trademark) is an example of silicone rubber.

[0072] The elastic modulus of the first elastic component E1 is different from that of the second elastic component E2. Therefore, appropriate pressing loads are applied to the pressed component M in both the thickness direction (radial direction of the upper roller 30) and the width direction (axial length direction of the upper roller 30). However, if the elastic modulus of the first elastic component E1 and the second elastic component E2 are the same, and appropriate pressing loads are applied in both the thickness and width directions, then the elastic modulus of the first elastic component E1 and the second elastic component E2 can also be the same. For the same reason, the elastic modulus of the first elastic component E1 and the elastic modulus of the third elastic component E3 can be either different or the same.

[0073] The portion of the upper side roller 30 containing the second elastic member E2 is mounted in a manner that allows it to be detached from the other portions of the upper side roller 30. Specifically, the following three configurations are illustrated. The first configuration is as follows: Figure 1 As shown, the second roller portion 32 is entirely composed of the second elastic member E2, and the second roller portion 32 is installed in a manner that allows it to be detached from the portion of the upper roller 30 other than the second roller portion 32. In a second configuration, only a portion of the second roller portion 32 (including the side surface abutting the pressed member M) is composed of the second elastic member E2, and only this second elastic member E2 is installed in a manner that allows it to be detached from the other portions of the upper roller 30. In a third configuration, only a portion of the second roller portion 32 is composed of the second elastic member E2, but the second roller portion 32 as a whole is installed in a manner that allows it to be detached from the portion of the upper roller 30 other than the second roller portion 32. This installation can be performed, for example, by fitting, by screws, or by both.

[0074] On the side surface of the pressed component M in each of the second elastic members E2, a modified portion R2 formed by fluorine coating is provided. This modified portion R2 constitutes a heat-resistant portion with a higher heat resistance temperature than other parts in the second elastic member E2, and also constitutes a durable portion that is less prone to damage than other parts. The heat resistance temperature of the modified portion R2 is approximately 250°C to 350°C. The coefficient of friction between the modified portion R2 of each second roller 32 and the pressed component M is 0.5 or less.

[0075] Preferably, similar to the side surface of the second elastic member E2, a modified portion R1 formed by fluorine coating is provided on the outer peripheral surface of the first elastic member E1, and preferably a modified portion R3 formed by fluorine coating is provided on the outer peripheral surface of the third elastic member E3.

[0076] Next, a pressing process using the roller pressing device 100 shown above will be described. This pressing process includes a roller heating step, a pressed part heating step, and a pressing step.

[0077] In the roller heating process, rollers 30 and 40 are heated using a roller heater or the like. At this time, for the upper roller 30, at least one of the first roller section 31 and the second roller section 32 is heated. However, it is preferable to heat both the first roller section 31 and the second roller section 32. Specifically, in this roller heating process, rollers 30 and 40 are heated to approximately 45°C to 200°C.

[0078] In the heating process of the pressed component, the pressed component M is heated to approximately 45°C to 200°C at a position upstream of rollers 30 and 40 using a heater or similar device. As a result, the pressed component M softens.

[0079] In the pressing process, rollers 30 and 40, which have been heated in the roller heating process, are used to press the pressed part M, which has been heated and softened in the pressed part heating process. As a result, the pressed part M (plate electrode) is densified.

[0080] The following is for reference Figure 2 , Figure 3 The effects of this implementation method will be explained. Figure 2 This is a front cross-sectional view of the roller pressing device 100 of this embodiment. Figure 3 It is a drawing from Figure 2 The figure shows a front cross-sectional view of a comparative example of a roller pressing apparatus 100 of this embodiment, in which the two second roller sections 32 have been removed.

[0081] exist Figure 3 In the pressing process of the comparative example shown, since there is no second roller 32, when the pressed part M is pressed inward in the thickness direction using the first roller 31 and the third roller 43, a portion of the pressing load escapes outward in the width direction. Therefore, it is possible for cracks to occur at the width end of the pressed part M.

[0082] At this point, Figure 2 In the pressing process of this embodiment, the component M to be pressed is pressed inward in the thickness direction using the first roller 31 and the third roller 43, while simultaneously being pressed inward in the width direction using the two second rollers 32. Thus, the component M is pressed inward in both the thickness direction (two directions) and the width direction (two directions) (four directions), and compared to the comparative example, the pressing load is less likely to escape outward in the width direction. As a result, end breakage of the component M can be suppressed, thereby improving the quality of the component M.

[0083] Furthermore, at this time, the pressed component M is pressed from both sides in the width direction by the second elastic member E2. Furthermore, when the first roller portion 31 has the first elastic member E1 and the third roller portion 43 has the third elastic member E3, the pressed component M is also pressed from both sides in the width direction by the first elastic member E1 and the third elastic member E3. Therefore, it is easy to apply a suitable pressing load to the pressed component M from all directions. That is, for example, it is considered that if the dimensional error of the pressed component M is large, the error between the pressing load applied to the pressed component M from all directions and the intended load will also increase. In this regard, if the elastic members E1 to E3 are used in this way, the error with the intended load can be suppressed, thereby making it easy to apply the intended suitable pressing load to the pressed component M from all directions. As a result, end breakage of the pressed component M can be effectively suppressed.

[0084] Furthermore, the second roller portion 32 protrudes to a position lower than the upper end of the third roller portion 43, thanks to the interference avoidance portion 42. Therefore, compared to the case where the second roller portion 32 only protrudes to the upper end of the third roller portion 43, the contact area between the second roller portion 32 and the pressed component M is increased. As a result, in this respect, end breakage of the pressed component M can be effectively suppressed.

[0085] Furthermore, in this embodiment, the pressed component M is softened by heating during the pressing process, and then pressed during the pressing process. Therefore, compared to the case where softening is not performed, the pressed component M can be densified more efficiently. Moreover, since each elastic component E1 to E3 has a heat-resistant portion composed of modified portions R1 to R3, the drawback of damage to elastic components E1 to E3 due to the heated pressed component M can also be suppressed.

[0086] Furthermore, according to this embodiment, since the portion of the upper roller 30 containing the second elastic member E2 is installed in a manner that allows it to be detached from the other portions of the upper roller 30, even if the second elastic member E2 is depleted, it is not necessary to replace the entire upper roller 30; only the portion containing the second elastic member E2 needs to be replaced. Therefore, costs are reduced.

[0087] Furthermore, in this embodiment, since the upper roller 30 has a second roller portion 32, there is a concern that the pressed part M could be easily pulled in by the rotational direction of the upper roller 30, compared to the comparative example without the second roller portion 32. In this regard, since the coefficient of friction between the elastic member E2 of the second roller portion 32 and the pressed part M is 0.5 or less, such a drawback can be suppressed.

[0088] Furthermore, in this embodiment, the pressed component M is Figure 5The solid-state battery 200 schematically illustrated has plate-shaped electrodes (positive electrode Mp, negative electrode Mn). To reduce resistance, these plate-shaped electrodes require densification and are also required to be mass-produced. In this regard, according to this embodiment, by pressing the pressed component M using a roller pressing device 100, densified plate-shaped electrodes (positive electrode Mp, negative electrode Mn) can be mass-produced.

[0089] Specifically, the solid-state battery 200 has a positive electrode Mp and a negative electrode Mn, which are pressed components M (plate-shaped electrodes) pressed by the roller pressing device 100, and a solid electrolyte S is present between these positive electrode Mp and negative electrode Mn. Furthermore, in Figure 5 For visual clarity, the positive electrode Mp, solid electrolyte S, and negative electrode Mn are shown broadly in the stacking direction (horizontal direction in the figure), which corresponds to the thickness direction of the positive electrode Mp and negative electrode Mn. Since the positive electrode Mp and negative electrode Mn are densified as described above, the interfacial resistance between the positive electrode Mp and the solid electrolyte S, and the interfacial resistance between the negative electrode Mn and the solid electrolyte S, can be reduced, respectively. Furthermore, as described above, end breakage of the positive electrode Mp and negative electrode Mn can be suppressed. Therefore, a high-quality solid-state battery 200 is achieved.

[0090] The embodiments shown above can be implemented, for example, by the following modifications.

[0091] (Example 1 of the amendment) Figure 4 As shown, the second elastic component E2 can also have multiple elastomers E2a and E2b with different elastic moduli. Specifically, an example is shown where the portion of the second elastic component E2 including the side surface that abuts against the pressed component M is made of an elastomer E2a with relatively high heat resistance and durability, while the remaining portion is made of other elastomers E2b with relatively low heat resistance and durability. In this case, for example, by using the former elastomer E2a to form the heat-resistant and durable portions of the second elastic component E2, fluorine coating can be omitted.

[0092] (Modification 2) The roller speed of the roller pressing device 100 can also be set to, for example, less than 100 m / min, and the heating process of the pressed part can be eliminated. Furthermore, in the pressing process, the pressed part M can be heated and softened by using the rollers 30 and 40 that have been heated by the roller heating process, while being pressed.

[0093] Figure Labels

[0094] 30: Upper side roller

[0095] 31: First roller section

[0096] 32: Second Roll Section

[0097] 40: Lower side roller

[0098] 43: Third Roll Section

[0099] 100: Roller pressing device

[0100] 200: Solid-state battery

[0101] E1: First elastic component

[0102] E2: Second elastic component

[0103] E2a: Elastomer

[0104] E2b: Elastomer

[0105] E3: Third elastic component

[0106] R1: Modification section of the first roller section

[0107] R2: Modification section of the second roller section

[0108] R3: Modification section of the third roller section

[0109] M: Pressed component

[0110] Mp: Positive electrode plate

[0111] Mn: Negative electrode plate

[0112] S: Solid electrolyte

Claims

1. A roller pressing device, comprising rollers for pressing the parts to be pressed, The aforementioned roller has: a first roller portion that presses the aforementioned pressed member in the radial direction of the aforementioned roller; and a second roller portion that protrudes further in the radial direction than the aforementioned first roller portion on each side closer to the axial length direction of the aforementioned roller, and abuts against the aforementioned pressed member from the axial length direction side. The aforementioned second roller portion has an elastic component at least in the portion that abuts against the aforementioned pressed component. The aforementioned elastic component comprises multiple elastic bodies with different elastic moduli arranged along the aforementioned axial length direction. The elastomer that comes into contact with the aforementioned pressed component has higher heat resistance than the elastomer that does not come into contact with the aforementioned pressed component.

2. The roller pressing device according to claim 1, wherein, It has another roller that presses the aforementioned pressed component from the opposite side of the aforementioned roller. The aforementioned other roller has a third roller section opposite to the aforementioned first roller section, and an interference avoidance section opposite to the aforementioned second roller section. Compared to the outer peripheral surface of the aforementioned third roller section, the outer peripheral surface of the aforementioned interference avoidance section is located radially inside the aforementioned other roller. The aforementioned second roller protrudes further radially inward than the aforementioned third roller's outer peripheral surface.

3. The roller pressing device according to claim 1 or 2, wherein, The aforementioned elastic member has a heat-resistant portion with a higher heat resistance temperature than other portions in the part that includes the surface that abuts against the aforementioned pressed member.

4. The roller pressing device according to claim 1 or 2, wherein, The coefficient of friction between the aforementioned elastic component and the aforementioned pressed component is less than 0.

5.

5. The roller pressing device according to claim 1 or 2, wherein, The aforementioned elastic member has a modified portion in the part that abuts against the aforementioned pressed member.

6. The roller pressing device according to claim 5, wherein, The aforementioned modified part is formed by applying fluorine coating to the surface of the aforementioned elastic component.

7. The roller pressing device according to claim 1 or 2, wherein, The portion of the aforementioned roller containing the aforementioned elastic component is installed in a manner that allows it to be detached from the other portions of the aforementioned roller.

8. The roller pressing device according to claim 1 or 2, wherein, The aforementioned elastic component is a second elastic component, and the aforementioned first roller portion has a first elastic component at least in the portion that abuts against the aforementioned pressed component.

9. The roller pressing device according to claim 8, wherein, The elastic modulus of the first elastic component is different from that of the second elastic component.

10. The roller pressing device according to claim 1 or 2, wherein, The aforementioned pressed component is a plate-shaped electrode.

11. A pressing process method, using a roller pressing device, said roller pressing device having rollers for pressing the part being pressed, The aforementioned roller has: a first roller portion that presses the aforementioned pressed member in the radial direction of the aforementioned roller; and a second roller portion that protrudes further in the radial direction than the aforementioned first roller portion on each side closer to the axial length direction of the aforementioned roller, and abuts against the aforementioned pressed member from the axial length direction side. The aforementioned second roller portion has an elastic component at least in the portion that abuts against the aforementioned pressed component. The aforementioned elastic component comprises multiple elastic bodies with different elastic moduli arranged along the aforementioned axial length direction. The elastomer that comes into contact with the aforementioned pressed component has higher heat resistance than the elastomer that does not come into contact with the aforementioned pressed component. The pressing process includes a pressing step, in which the first roller presses the component in the radial direction while the second roller presses the component in the axial direction.

12. The pressing process according to claim 11, wherein, It includes a pressing component heating process for heating the aforementioned pressed component. In the aforementioned pressing process, the aforementioned pressed component, which has been heated by the aforementioned pressed component heating process, is pressed.

13. The pressing process according to claim 11 or 12, wherein, It includes a roller heating process for heating the aforementioned rollers. In the aforementioned pressing process, the aforementioned roller, heated by the aforementioned roller heating process, is used to press the aforementioned pressed component.

14. The pressing process according to claim 11 or 12, wherein, The aforementioned pressed component is a plate-shaped electrode.

15. A solid-state battery having the aforementioned plate-shaped electrode pressed by the roller pressing device of claim 10, and a solid electrolyte abutting against the aforementioned plate-shaped electrode.

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