JP6939587B2 - Electrode laminate manufacturing equipment - Google Patents

Description

The present invention relates to an electrode laminate manufacturing apparatus for manufacturing a rectangular electrode laminate in which a first separator, a first electrode plate, a second separator, and a second electrode plate are laminated in this order and integrated.

As an electrode body of a battery such as a lithium ion secondary battery, a laminated electrode body in which a plurality of rectangular positive electrode plates and a plurality of negative electrode plates are alternately laminated via a separator is known. Such a laminated electrode body is manufactured by, for example, the following method. That is, the strip-shaped first separator 941x and the strip-shaped second separator 931x are brought into close contact with both main surfaces of the strip-shaped negative electrode plate 921x to form a strip-shaped composite 951x (see FIG. 11).

After that, the strip-shaped composite 951x and the plurality of rectangular positive electrode plates 911 are pressed by a pair of pressure rolls 961,963 to press the strip-shaped first separator 941x, the strip-shaped negative electrode plate 921x, the strip-shaped second separator 931x, and the transport direction. A strip-shaped electrode laminate 901x is formed by laminating a plurality of positive electrode plates 911 arranged in a row in the (longitudinal direction) in this order. Then, of the strip-shaped electrode laminate 901x, the strip-shaped first separator 941x, the strip-shaped negative electrode plate 921x, and the strip-shaped second separator 931x are cut at predetermined intervals in the longitudinal direction to obtain a rectangular electrode laminate 901. Then, a plurality of the electrode laminated bodies 901 are stacked to form a laminated electrode body.
In addition, Patent Document 1 is mentioned as a related prior art.

Japanese Unexamined Patent Publication No. 10-233209

However, when the band-shaped composite 951x and the positive electrode plate 911 are pressed with the pair of pressure rolls 961 and 963 to form the band-shaped electrode laminated body 901x, the band-shaped electrode laminated body 901x is warped. Generally, the band-shaped composite 951x and the positive electrode plate 911 are different in the easiness of deformation when pressed by a pair of pressure rolls 961 and 963. For example, when the strip-shaped complex 951x is more easily deformed at the time of pressurization than the positive electrode plate 911, the strip-shaped complex 951x is deformed more greatly than the positive electrode plate 911 due to the pressurization. Then, in the portion of the positive electrode plate 911 sandwiched between the pair of pressure rolls 961 and 963, the positive electrode plate 911 moves to the strip-shaped complex 951x side (lower in FIG. 11), so that the positive electrode plate 911 as a whole is viewed. And, it warps in the form of being convex toward the band-shaped complex 951x side (convex downward in FIG. 11). Then, in this state, each positive electrode plate 911 and the band-shaped composite 951x are integrated to form the band-shaped electrode laminate 901x, so that the band-shaped electrode laminate 901x also has a convex shape toward the band-shaped composite 951x. It warps greatly in the entire transport direction (longitudinal direction). Further, the individual electrode laminates 901 obtained by cutting the strip-shaped electrode laminates 901x also warp significantly as a whole.

The present invention has been made in view of the current situation, and it is possible to suppress the occurrence of a large warp over the entire electrode laminate composed of the first separator, the first electrode plate, the second separator and the second electrode plate. An object of the present invention is to provide an apparatus for manufacturing an electrode laminate.

One aspect of the present invention for solving the above problems is an electrode laminate that manufactures an electrode laminate in which a first separator, a first electrode plate, a second separator, and a second electrode plate are laminated in this order and integrated. The first separator, the first electrode plate, the second separator, and the second electrode plate are laminated in this order, but the electrode laminate before integration is not integrated, or The strip-shaped first separator which becomes the first separator by cutting, the strip-shaped first electrode plate which becomes the first electrode plate by cutting, the strip-shaped second separator which becomes the second separator by cutting, and the strip-shaped second separator which becomes the second separator by cutting, and arranged in a row in the transport direction. A pair of pressure rolls in which a plurality of the second electrode plates are laminated in this order but are not integrated, and the strip-shaped electrode laminate before integration is continuously pressed in the thickness direction in the roll gap to be integrated. , The electrode laminate before integration or the strip-shaped electrode before integration on the insertion side of the roll gap as the pressure is applied by the pair of pressure rolls. It is provided with a warp regulating member that regulates the movement of the laminated body in the thickness direction, and extends on the roll surface of at least one of the pair of pressure rolls in the axial direction of the pressure rolls. Further, in the electrode laminate, a plurality of compressed portions pressurized by the pair of pressure rolls and non-compressed portions not pressurized by the pair of pressure rolls are alternately generated in the transport direction. This is an apparatus for manufacturing an electrode laminate having a plurality of axial grooves distributed in the circumferential direction of the pressure roll.

The above-mentioned electrode laminate manufacturing apparatus has the above-mentioned plurality of axial grooves on the roll surface of at least one of the pressure rolls, and includes the above-mentioned warp regulating member. By providing the axial groove in the pressurizing roll, the electrode laminate or the strip-shaped electrode laminate after pressurization is pressurized by the compression portion pressurized by the pair of pressurizing rolls and the pressurizing portion by the pair of pressurizing rolls. A plurality of uncompressed portions (sandwiched between axial grooves and not pressurized) are formed alternately in the transport direction. Of this electrode laminate or strip-shaped electrode laminate, the compressed portion is deformed by pressurization, but the non-compressed portion is not deformed by pressurization. Therefore, the electrode laminate or strip-shaped electrode laminate is subjected to pressurization. A portion that is deformed and a portion that is not deformed by pressure are alternately formed in the transport direction.

On the other hand, on the insertion side of the roll gap, the warp regulating member restricts the movement of the electrode laminate before integration or the strip-shaped electrode laminate before integration in the thickness direction, so that the electrode laminate after pressurization Looking at the body or the strip-shaped electrode laminate as a whole, the transport direction is in the electrode laminate or the strip-shaped electrode laminate as compared with the case where the pressure roll does not have the axial groove or the manufacturing apparatus does not have the warp regulating member. It is possible to suppress the occurrence of a large warp over the whole. Further, each of the individual electrode laminates obtained by cutting the strip-shaped electrode laminate also has a plurality of compressed portions and non-compressed portions. Therefore, it is possible to suppress the occurrence of a large warp of each electrode laminate as a whole.

The roll surface of the pressure roll is provided with grooves other than the above-mentioned axial grooves, for example, a plurality of circumferential grooves extending in the circumferential direction of the pressure roll and distributed in the axial direction of the pressure roll. It may have been.

Further, as a method of forming the "electrode laminate before integration", for example, a composite in which the first separator and the second separator are in close contact with each other on both main surfaces of the first electrode plate is first formed, and then the composite is formed. , This composite and the second electrode plate can be overlapped to form an electrode laminate before integration. Further, first, a first complex in which the first separator and the first electrode plate are in close contact with each other and a second complex in which the second separator and the second electrode plate are in close contact with each other are formed, and then each of them is formed. , The first complex and the second complex may be superposed to form an electrode laminate before integration. Further, the first separator, the first electrode plate, the second separator and the second electrode plate may be overlapped with each other to form an electrode laminate before integration without forming the above-mentioned composite in advance. ..

Further, as a method of forming the "belt-shaped electrode laminate before integration", for example, a strip-shaped composite in which the strip-shaped first separator and the strip-shaped second separator are first formed on both main surfaces of the strip-shaped first electrode plate is formed. After that, the strip-shaped composite and the plurality of second electrode plates can be overlapped to form a strip-shaped electrode laminate before integration. Further, first, the band-shaped first complex in which the band-shaped first separator and the band-shaped first electrode plate are in close contact with each other, and the band-shaped second complex in which the band-shaped second separator and the plurality of second electrode plates are in close contact with each other are obtained. Each of them may be formed, and then the band-shaped first complex and the band-shaped second complex may be overlapped to form a band-shaped electrode laminate before integration. Further, the band-shaped first separator, the band-shaped first electrode plate, the band-shaped second separator, and the plurality of second electrode plates are overlapped with each other without forming the band-shaped composite as described above in advance, and the band-shaped electrodes are laminated before integration. You may form a body.

Another aspect is a method for manufacturing an electrode laminate in which a first separator, a first electrode plate, a second separator, and a second electrode plate are laminated and integrated in this order, and the first separator, the above, and the above. The first electrode plate, the second separator, and the second electrode plate are laminated in this order, but the electrode laminate before integration is not integrated, or the strip-shaped first separator which becomes the first separator by cutting. A strip-shaped first electrode plate that becomes the first electrode plate by cutting, a strip-shaped second separator that becomes the second separator by cutting, and a plurality of the second electrode plates arranged in the transport direction are laminated in this order. This is a pressurizing step of continuously pressurizing the unintegrated strip-shaped electrode laminate before integration in the roll gaps of the pair of pressurizing rolls in the thickness direction to integrate them, wherein the pair of pressurizing rolls are integrated. A compression portion extending in the axial direction of the pressure roll on the roll surface of at least one of the pressure rolls and pressed by the pair of pressure rolls on the electrode laminate, and the pair of additions. The pressure roll having a plurality of axial grooves distributed in the circumferential direction of the pressure roll and the roll in an arrangement in which a plurality of non-compressed portions not pressed by the pressure roll are alternately generated in the transport direction. It is arranged on the insertion side of the gap portion, and with the pressurization by the pair of pressure rolls, the electrode laminate before integration or the strip-shaped electrode laminate before integration is formed on the insertion side of the roll gap. By using the warp regulating member that regulates the resulting movement in the thickness direction, the warp regulating member can move the electrode laminate before integration or the strip-shaped electrode laminate before integration in the thickness direction. Manufacture of an electrode laminate comprising a pressurizing step of integrating the electrode laminate before integration or the strip-shaped electrode laminate before integration to form the electrode laminate or the strip-shaped electrode laminate while restricting. The method.

The above-mentioned method for manufacturing an electrode laminate includes a pressurization step using the above-mentioned pressurizing roll and the warp regulating member. Since the pressure roll has the above-mentioned axial groove, a plurality of compressed portions and non-compressed portions are alternately formed in the electrode laminated body or the strip-shaped electrode laminated body after pressurization in the transport direction as described above. .. Of these, the compressed portion is deformed by pressurization, but the non-compressed portion is not deformed by pressurization. The parts that do not occur are formed alternately in the transport direction.

On the other hand, on the insertion side of the roll gap, the warp regulating member restricts the movement of the electrode laminate before integration or the strip-shaped electrode laminate before integration in the thickness direction, so that the electrode laminate after pressurization Looking at the whole body or strip-shaped electrode laminate, the entire transport direction is applied to the electrode laminate or strip-shaped electrode laminate as compared with the case where a pressure roll having no axial groove is used or a warp regulating member is not used. It is possible to suppress the occurrence of a large warp. Further, since each of the individual electrode laminates obtained by cutting the strip-shaped electrode laminate also has a plurality of compressed portions and non-compressed portions, it is possible to suppress the occurrence of a large warp over the whole.

Further, in the method for manufacturing the above-mentioned electrode laminate, the pressurizing step is a step of forming the strip-shaped electrode laminate, and among the above-mentioned strip-shaped electrode laminates, the above-mentioned strip-shaped first separator and the above-mentioned strip-shaped first separator. It is preferable that the method for manufacturing the electrode laminate further includes a cutting step of cutting the electrode plate and the strip-shaped second separator at predetermined intervals in the longitudinal direction to form the electrode laminate.

As described above, each of the individual electrode laminates obtained by cutting the strip-shaped electrode laminate also has a plurality of compressed portions and non-compressed portions. Therefore, it is possible to suppress the occurrence of a large warp over the entire electrode laminate formed in the cutting step.

Further, in the method for manufacturing an electrode laminate according to any one of the above, the dimension of the second electrode plate in the transport direction is smaller than the dimension of the first electrode plate in the transport direction, and the pressurization step is performed. Is a method for manufacturing an electrode laminate in which both ends of the second electrode plate in the transport direction are not pressurized and are used as the non-compressed portion of the electrode laminate or the strip-shaped electrode laminate. Is preferable.

In the pressurizing step, the end portion of the second electrode plate in the transport direction is also pressurized, that is, the portion of the electrode laminate or the strip-shaped electrode laminate where the end portion of the second electrode plate is located is designated as the compression portion. At the time of pressurization, the force is concentrated on the end (corner) of the second electrode plate, and the end of the second electrode plate breaks through the second separator or the strip-shaped second separator and the first electrode plate or the strip-shaped first. 1 There is a risk of contact with the electrode plate and short circuit. On the other hand, in the above-mentioned manufacturing method, in the electrode laminate or the strip-shaped electrode laminate, the portions where both ends of the second electrode plate in the transport direction are located are not pressurized and are made into non-compressed portions. Therefore, no force is applied to the end portion of the second electrode plate during pressurization, so that the end portion of the second electrode plate breaks through the second separator or the strip-shaped second separator to break through the second electrode plate or the strip-shaped first separator. It is possible to prevent a short circuit due to contact with the electrode plate.

It is a top view of the electrode laminated body which concerns on embodiment. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 1 of the electrode laminate according to the embodiment. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 1 of the electrode laminate according to the embodiment. It is a flowchart of the manufacturing method of the electrode laminated body which concerns on embodiment. It is explanatory drawing which shows the appearance of forming a band-shaped complex according to an embodiment. It is explanatory drawing which looked at the state of forming the band-shaped electrode laminated body by the manufacturing apparatus of the electrode laminated body of embodiment from the side. It is explanatory drawing which looked at the state of forming the band-shaped electrode laminated body by the manufacturing apparatus of the electrode laminated body of an embodiment from above. It is explanatory drawing which concerns on the manufacturing apparatus of the electrode laminated body of the modified form 1, and corresponds to FIG. 7 seen from above. It is explanatory drawing which concerns on the manufacturing apparatus of the electrode laminated body of the modified form 2 and corresponds to FIG. 6 seen from the side. It is a flowchart of the manufacturing method of the electrode laminated body which concerns on deformation form 3. It is explanatory drawing which shows the state that the band-shaped electrode laminated body warps in relation to the prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a plan view of the electrode laminate 1 according to the present embodiment, FIG. 2 shows a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 shows a cross-sectional view taken along the line BB in FIG. In the following description, the vertical direction EH, the horizontal direction FH, and the stacking direction GH of the electrode laminated body 1 are defined as the directions shown in FIGS. 1 to 3.

The electrode laminate 1 constitutes a laminated electrode body housed inside a square and sealed lithium ion secondary battery mounted on a vehicle such as a hybrid car, a plug-in hybrid car, or an electric vehicle. be. That is, a rectangular parallelepiped laminated electrode body is formed by stacking a plurality of the electrode laminated bodies 1 in the stacking direction GH.
In the electrode laminate 1, the first separator 41, the negative electrode plate (first electrode plate) 21, the second separator 31, and the positive electrode plate (second electrode plate) 11 each having a rectangular shape are laminated and integrated in this order. It has an electrode shape (see FIGS. 2 and 3) and has a rectangular shape in a plan view (see FIG. 1).

Of these, the positive electrode plate 11 is formed by providing the positive electrode active material layers 13 and 13 containing the positive electrode active material in a rectangular shape on both main surfaces of the positive electrode current collecting foil 12 made of a rectangular aluminum foil. Of the positive electrode plates 11, the left end portion in FIGS. 1 and 2 has a positive electrode active material layer 13 not present in the thickness direction DH, and the positive electrode current collector foil 12 is exposed in the thickness direction DH. It has become. The dimension EM1 of the positive electrode plate 11 in the vertical direction EH is smaller than the dimension EM2 of the negative electrode plate 21 and the electrode laminate 1 in the vertical direction EH.

The negative electrode plate 21 is formed by providing negative electrode active material layers 23 and 23 containing a negative electrode active material in a rectangular shape on both main surfaces of a negative electrode current collecting foil 22 made of a rectangular copper foil. Of the negative electrode plate 21, the right end portion in FIGS. 1 and 2 has a negative electrode active material layer 23 not present in the thickness direction DH, and the negative electrode current collector foil 22 is exposed in the thickness direction DH. It has become.

The first separator 41 is adhered to the main surface of the negative electrode plate 21 on the side opposite to the positive electrode plate 11 side (lower side in FIGS. 2 and 3). The first separator 41 is composed of a separator main body 42 having a rectangular plate shape and made of a polyethylene porous film, and porous adhesive layers 43 and 43 formed on both main surfaces of the separator main body 42, respectively. NS. The adhesive layer 43 is composed of polyethylene particles and a binder that binds the polyethylene particles to each other and the polyethylene particles to the separator main body 42.

The second separator 31 is interposed between the positive electrode plate 11 and the negative electrode plate 21 in a state of being adhered to the positive electrode plate 11 and the negative electrode plate 21, respectively. The second separator 31 is composed of a separator main body 32 having a rectangular plate shape and made of a polyethylene porous film, and porous adhesive layers 33 and 33 formed on both main surfaces of the separator main body 32, respectively. NS. The adhesive layer 33 is also composed of polyethylene particles and a binder.

In the electrode laminate 1, the compressed portion 1p in which the electrode laminate 1 is compressed in the stacking direction GH and the uncompressed portion 1q in which the electrode laminate 1 is not compressed in the stacking direction GH are combined with each other in the vertical direction EH (described later). It has a plurality of alternating electrodes (the same direction as the transport direction IH and the longitudinal direction BH) (see FIG. 3). In each compression portion 1p, the positive electrode plate 11 is compressed and deformed into a downwardly concave (downwardly convex) form in FIG. 3, and the negative electrode plate 21 is compressed more than the positive electrode plate 21. On the other hand, since each uncompressed portion 1q is not compressed, the deformation as in the compressed portion 1p does not occur. When the electrode laminate 1 is viewed as a whole, it is prevented that a large warp occurs over the entire vertical EH.
In the electrode laminate 1, the portions 1t and 1t where both ends 11t and 11t of the positive electrode plate 11 in the vertical direction EH are located are the uncompressed portions 1q and 1q, respectively. Therefore, as will be described later, it is prevented that the end portion 11t of the positive electrode plate 11 breaks through the second separator 31 and comes into contact with the negative electrode plate 21 to cause a short circuit due to compression.

Next, a method for manufacturing the electrode laminate 1 will be described (see FIGS. 4 to 7). First, in the "strip-shaped positive electrode plate forming step S1" (see FIG. 4), a strip-shaped positive electrode plate (strip-shaped second electrode plate) 11x which becomes a rectangular positive electrode plate 11 by cutting is formed. That is, a positive electrode current collecting foil 12 made of a strip-shaped aluminum foil is prepared, a positive electrode paste containing a positive electrode active material is applied to one of the main surfaces thereof, and the surface is heated and dried to form a positive electrode active material layer 13. Further, the positive electrode paste is similarly applied to the main surface on the opposite side of the positive electrode current collector foil 12 and dried by heating to form the positive electrode active material layer 13. Then, the strip-shaped positive electrode plate is pressed with a roll press machine to increase the density of the positive electrode active material layers 13 and 13. As a result, the strip-shaped positive electrode plate 11x is formed.

Separately, in the "strip-shaped negative electrode plate forming step S2", a strip-shaped negative electrode plate (strip-shaped first electrode plate) 21x which becomes a rectangular negative electrode plate 21 by cutting is formed. That is, a negative electrode current collecting foil 22 made of a strip-shaped copper foil is prepared, a negative electrode paste containing a negative electrode active material is applied to one of the main surfaces thereof, and the negative electrode active material layer 23 is formed by heating and drying. Further, the negative electrode paste is similarly applied to the main surface on the opposite side of the negative electrode current collector foil 22 and dried by heating to form the negative electrode active material layer 23. Then, the strip-shaped negative electrode plate is pressed with a roll press machine to increase the density of the negative electrode active material layers 23 and 23. As a result, the strip-shaped negative electrode plate 21x is formed.

Separately, in the "strip-shaped first separator forming step S3", a strip-shaped first separator 41x to be a rectangular first separator 41 is formed by cutting. That is, a strip-shaped separator main body 42 made of a porous polyethylene film is prepared, a dispersion liquid containing polyethylene particles and a binder as a dispersion medium is applied to one main surface of the separator main body 42, and the mixture is heated and dried. Form the adhesive layer 43. Further, the dispersion liquid is similarly applied to the main surface on the opposite side of the separator main body 42 and dried by heating to form the adhesive layer 43. As a result, the band-shaped first separator 41x is formed.

Separately, in the "strip-shaped second separator forming step S4", a strip-shaped second separator 31x to be a rectangular second separator 31 is formed by cutting. That is, similarly to the band-shaped first separator forming step S3, the dispersion liquid containing the above-mentioned polyethylene particles and the like is applied to one main surface of the separator main body 32 and dried by heating to form the adhesive layer 33. Further, the dispersion liquid is similarly applied to the main surface on the opposite side of the separator main body 32 and dried by heating to form the adhesive layer 33. As a result, the strip-shaped second separator 31x is formed.

Regarding the strip-shaped positive electrode plate 11x obtained in the strip-shaped positive electrode plate forming step S1, in the “positive electrode plate forming step S5”, the strip-shaped positive electrode plate 11x is cut at predetermined intervals in the longitudinal direction BH to obtain the rectangular positive electrode plate 11. Form.

On the other hand, regarding the band-shaped negative electrode plate 21x, the band-shaped first separator 41x, and the band-shaped second separator 31x obtained in the band-shaped negative electrode plate forming step S2, the band-shaped first separator forming step S3, and the band-shaped second separator forming step S4, respectively, " In the band-shaped complex forming step S6 ”, these are brought into close contact with each other to form the band-shaped complex 51x. A complex manufacturing apparatus 200 is used to form the band-shaped complex 51x (see FIG. 5). The complex manufacturing apparatus 200 includes a negative electrode plate supply unit 210, a first separator supply unit 220, a second separator supply unit 230, and a roll press unit 240.

Of these, a strip-shaped negative electrode plate 21x wound around the unwinding roll 211 is attached to the negative electrode plate supply section 210, and the strip-shaped negative electrode plate 21x is sent out from the negative electrode plate supply section 210 in the longitudinal direction BH. There is.
A first separator supply unit 220 is arranged below the negative electrode plate supply unit 210. A band-shaped first separator 41x wound around the unwinding roll 221 is attached to the first separator supply unit 220, and the band-shaped first separator 41x is sent out from the first separator supply unit 220 in the longitudinal direction BH. It has become.

A second separator supply unit 230 is arranged above the negative electrode plate supply unit 210. A band-shaped second separator 31x wound around the unwinding roll 231 is attached to the second separator supply unit 230, and the band-shaped second separator 31x is sent out from the second separator supply unit 230 in the longitudinal direction BH. It has become.
The roll press portion 240 is a portion where the strip-shaped first separator 41x, the strip-shaped negative electrode plate 21x, and the strip-shaped second separator 31x are pressed and brought into close contact with each other by a roll press. The roll press portion 240 has a pair of pressure rolls 241,243 arranged in parallel with each other via the roll gap portion KG1.

In the "belt-shaped complex forming step S6", the band-shaped first separator 41x, the band-shaped negative electrode plate 21x, and the band-shaped second separator 31x are laminated in this order to form a band-shaped complex 51x in close contact with each other using the complex manufacturing apparatus 200. do. Specifically, the strip-shaped negative electrode plate 21x sent out from the negative electrode plate supply section 210, the strip-shaped first separator 41x sent out from the first separator supply section 220, and the strip-shaped second separator sent out from the second separator supply section 230. The separators 31x are conveyed toward the roll gap portion KG1 of the roll press portion 240, respectively. Then, in the roll gap portion KG1, in a state where the strip-shaped negative electrode plate 21x is overlapped between the strip-shaped first separator 41x and the strip-shaped second separator 31x, these are continuously pressed in the longitudinal direction BH to be brought into close contact with each other to form a strip. It forms a complex 51x.

Next, in the "pressurizing step S7" (see FIG. 4), the strip-shaped composite 51x and the plurality of rectangular positive electrode plates 11 are laminated and integrated to form the strip-shaped electrode laminate 1x. For the formation of the strip-shaped electrode laminate 1x, an electrode laminate manufacturing apparatus (hereinafter, also simply referred to as “manufacturing apparatus”) 100 is used (see FIGS. 6 and 7). The manufacturing apparatus 100 includes a roll press unit 110 and a warp regulating member 120.
Of these, the roll press unit 110 presses and integrates the strip-shaped electrode laminate 1w before integration, in which the strip-shaped composite 51x and the plurality of positive electrode plates 11 arranged in rows in the transport direction IH are laminated. It is the part to be made to. The roll press portion 110 has a pair of pressure rolls 111 and 113 arranged in parallel with each other via the roll gap portion KG2.

On the other hand, the peripheral length CM1 of the pressure roll 111 (upper in FIG. 6) has the same length as the dimension EM2 (see FIG. 1) of the electrode laminate 1 in the vertical direction EH (conveyance direction IH, longitudinal direction BH). (CM1 = EM2). Further, the roll surface 111a of the pressure roll 111 is provided with a plurality of axial grooves 111m extending in the axial direction LH1 of the pressure roll 111 and distributed in the circumferential direction SH1 of the pressure roll 111.

These axial grooves 111m are formed from one end to the other end of the pressure roll 111, and the length of the axial groove 111m (dimension of the axial LH1) LM1 is the dimension of the strip-shaped electrode laminate 1x in the width direction. That is, it is made longer than the dimension FM (see FIG. 1) of the lateral FH of the electrode laminate 1 (LM1> FM). Further, the plurality of axial grooves 111m are formed over the entire circumference of the roll surface 111a at intervals KM1 equal to the circumferential direction SH1. In the present embodiment, the width JM1 of the circumferential SH1 of each axial groove 111 m is 8.0 mm, and the distance KM1 of the circumferential SH1 between the axial grooves 111 m is 16.0 mm.

On the other hand (lower in FIG. 6), the peripheral length CM2 of the pressure roll 113 is also set to the same length as the dimension EM2 (see FIG. 1) of the electrode laminate 1 in the vertical direction EH (conveyance direction IH, longitudinal direction BH). (CM2 = CM1 = EM2). Further, on the roll surface 113a of the pressure roll 113, a plurality of axial directions similar to the axial groove 111m extending in the axial direction LH2 of the pressure roll 113 and distributed in the circumferential direction SH2 of the pressure roll 113. A groove 113 m is provided.

These axial grooves 113m are formed from one end to the other end of the pressure roll 113, and the length of the axial groove 113m (dimension of the axial LH2) LM2 is also the dimension of the strip-shaped electrode laminate 1x in the width direction. It is made longer than (dimension FM of lateral FH of electrode laminate 1) (LM2> FM). Further, the axial groove 113m is also formed over the entire circumference of the roll surface 113a at an interval KM2 equal to the circumferential direction SH2. In the present embodiment, the width JM2 of the circumferential SH2 of each axial groove 113 m is also JM2 = JM1 = 8.0 mm, and the distance KM2 of the circumferential SH2 between the axial grooves 113 m is also KM2 = KM1 = 16.0 mm. ..
Further, these pressure rolls 111 and 113 are synchronized so that the axial groove 111 m of one pressure roll 111 and the axial groove 113 m of the other pressure roll 113 face each other in the roll gap KG2. It is configured to rotate.

The warp regulating member 120 regulates the movement of the strip-shaped electrode laminate 1w before integration in the thickness direction DH at the insertion side JA of the roll gap portion KG2 due to the pressurization by the pair of pressurizing rolls 111 and 113. It is a member. The warp regulating member 120 is arranged on the insertion side JA of the roll gap portion KG2. The warp regulating member 120 has a rectangular plate shape, and is arranged above the strip-shaped electrode laminate 1w before integration and below the strip-shaped electrode laminate 1w before integration. It has a side regulating member 123. The upper regulating member 121 has a rectangular and flat upper regulating surface 121c that faces the strip-shaped electrode laminate 1w (positive electrode plate 11) below the strip-shaped electrode laminate 1w (positive electrode plate 11) with a slight gap. Further, the lower regulating member 123 has a rectangular and flat lower regulating surface 123c that faces the strip-shaped electrode laminate 1w (belt-shaped first separator 41x) above the strip-shaped electrode laminate 1w (strip-shaped first separator 41x) with a slight gap.

In the "pressurizing step S7", the strip-shaped electrode laminate 1x is formed from the strip-shaped composite 51x and the plurality of positive electrode plates 11 by using the electrode laminate manufacturing apparatus 100. Specifically, the positive electrode plate 11 cut in a rectangular shape is superposed on the band-shaped second separator 31x of the band-shaped complex 51x, and arranged in a row in the band-shaped complex 51x and the transport direction IH (longitudinal direction BH). A band-shaped electrode laminate 1w before integration is formed of a plurality of positive electrode plates 11. Then, the strip-shaped electrode laminate 1w before the integration is conveyed to the roll gap portion KG2 of the roll press portion 110, and is continuously pressurized and integrated in the roll gap portion KG2. As a result, the strip-shaped first separator 41x, the strip-shaped negative electrode plate 21x, the strip-shaped second separator 31x, and the plurality of positive electrode plates 11 are laminated in this order to form a strip-shaped electrode laminate 1x.

At that time, the pair of pressure rolls 111 and 113 are synchronized so that the axial groove 111 m of one pressure roll 111 and the axial groove 113 m of the other pressure roll 113 face each other in the roll gap KG2. And rotate. Therefore, the strip-shaped electrode laminate 1x after pressurization was not pressurized by the compression portion 1p pressurized by the pair of pressurizing rolls 111 and 113 and by the pair of pressurizing rolls 111 and 113 (axial direction). A plurality of uncompressed portions 1q (which are sandwiched between the grooves 111 m and 113 m and are not pressurized) are alternately formed in the transport direction IH (longitudinal direction BH).

As described above, the peripheral lengths CM1 and CM2 of the pressure rolls 111 and 113 have the same length as the dimension EM2 (see FIG. 1) of the electrode laminate 1 in the vertical direction EH (conveyance direction IH, longitudinal direction BH). (CM1 = CM2 = EM2), and the roll surfaces 111a and 113a of the pressure rolls 111 and 113 are provided with a plurality of axial grooves 111m and 113m in the circumferential direction SH1. Therefore, in the same pattern, the above-mentioned compressed portion 1p and non-compressed portion 1q are formed in the vertical direction EH (conveyance direction) on the individual electrode laminated bodies 1 obtained by cutting the strip-shaped electrode laminated body 1x in the cutting step S8 described later. A plurality of IH and BH in the longitudinal direction are formed alternately.

On the other hand, on the insertion side JA of the roll gap portion KG2, the warp regulating member 120 restricts the movement of the strip-shaped electrode laminate 1w before integration in the thickness direction DH, so that the strip-shaped electrode laminate 1x after pressurization is restricted. When viewed as a whole (see FIG. 3), it is possible to prevent a large warp over the entire transport direction IH (longitudinal direction BH).

Here, in the pressurizing step S7, the end portion 11t of the positive electrode plate 11 in the transport direction IH (longitudinal direction BH, vertical direction EH) is also pressurized, that is, the end of the positive electrode plate 11 in the strip-shaped electrode laminate 1x. When the portion 1t where the portion 11t is located is the compression portion 1p, the force is concentrated on the end portion 11t of the positive electrode plate 11 during pressurization, and the end portion 11t of the positive electrode plate 11 breaks through the band-shaped second separator 31x. There is a risk of contacting the strip-shaped negative electrode plate 21x and causing a short circuit.

On the other hand, in the present embodiment, in the strip-shaped electrode laminate 1x, the portion 1t where the end portion 11t of the positive electrode plate 11 in the transport direction IH is located is not pressurized and is set as the uncompressed portion 1q. Specifically, the peripheral lengths CM1 and CM2 of the pressure rolls 111 and 113 have the same length as the dimension EM2 in the vertical direction EH (conveyance direction IH, longitudinal direction BH) of the electrode laminate 1 (CM1 = CM2 = EM2). The rotation of the pressure rolls 111 and 113 and the rotation of the pressure rolls 111 and 113 so that the portions 1t and 1t of the strip-shaped electrode laminate 1x where both ends 11t and 11t of the positive electrode plate 11 are located are sandwiched between the axial grooves 111m and 113m, respectively. The transport of the strip-shaped electrode laminate 1w before integration is controlled. Therefore, no force is applied to the end portion 11t of the positive electrode plate 11 during pressurization, so that the end portion 11t of the positive electrode plate 11 breaks through the strip-shaped second separator 31x and comes into contact with the strip-shaped negative electrode plate 21x to cause a short circuit. Can be prevented.

Next, in the "cutting step S8", of the strip-shaped electrode laminate 1x, the strip-shaped first separator 41x, the strip-shaped negative electrode plate 21x, and the strip-shaped second separator 31x are cut at predetermined intervals in the longitudinal direction BH. Thus, the rectangular electrode laminate 1 (see FIGS. 1 to 3) is formed.
As described above, each of the electrode laminates 1 also has a plurality of compressed portions 1p and non-compressed portions 1q alternately in the vertical direction EH (conveying direction IH, longitudinal direction BH). Therefore, it is possible to prevent a large warp of each electrode laminate 1 from occurring as a whole.

As described above, the electrode laminate manufacturing apparatus 100 has a plurality of axial grooves 111m and 113m on the roll surfaces 111a and 113a of the pressure rolls 111 and 113, respectively, and includes a warp regulating member 120. .. By providing the axial grooves 111m and 113m on the pressurizing rolls 111 and 113, the strip-shaped electrode laminate 1x after pressurization has a pair of compression portions 1p pressurized by the pair of pressurizing rolls 111 and 113. A plurality of uncompressed portions 1q that were not pressurized by the pressurizing rolls 111 and 113 of the above are alternately formed in the transport direction IH (longitudinal direction BH). Of the strip-shaped electrode laminate 1x, the compressed portion 1p is deformed by pressure, but the non-compressed portion 1q is not deformed by pressure. Therefore, the strip-shaped electrode laminate 1x is deformed by pressure. And the portion that is not deformed by pressurization are alternately formed in the transport direction IH (longitudinal direction BH).

On the other hand, on the insertion side JA of the roll gap portion KG2, the warp regulating member 120 restricts the movement of the strip-shaped electrode laminate 1w before integration in the thickness direction DH, so that the strip-shaped electrode laminate 1x after pressurization is restricted. As a whole, compared to the case where the axial grooves 111m and 113m do not exist in the pressure rolls 111 and 113 or the manufacturing apparatus 100 does not have the warp regulating member 120, the transport direction IH ( It is possible to suppress the occurrence of a large warp over the entire longitudinal direction BH). Further, each of the individual electrode laminates 1 obtained by cutting the strip-shaped electrode laminate 1x also has a plurality of compressed portions 1p and non-compressed portions 1q, respectively. Therefore, it is possible to suppress the occurrence of a large warp of each electrode laminate 1 as a whole.

Further, in the present embodiment, in the pressurizing step S7, the portions 1t and 1t of the strip-shaped electrode laminate 1x where both ends 11t and 11t of the positive electrode plate 11 in the transport direction IH (longitudinal direction BH) are located are all located. The uncompressed portions 1q and 1q are used. As a result, no force is applied to both ends 11t and 11t of the positive electrode plate 11 during pressurization, so that the ends 11t of the positive electrode plate 11 break through the band-shaped second separator 31x and come into contact with the band-shaped negative electrode plate 21x to cause a short circuit. Can be prevented.

(Deformation form 1)
Next, a first modification of the above embodiment will be described. In the electrode laminate manufacturing apparatus 100 of the embodiment, only the axial grooves 111m and 113m are formed on the roll surfaces 111a and 113a of the pressure rolls 111 and 113 (see FIGS. 6 and 7). On the other hand, in the electrode laminate manufacturing apparatus 300 (see FIG. 8) of the present modified form 1, in addition to the axial grooves 311 m and 313 m, the circumferential grooves are formed on the roll surfaces 311a and 313a of the pressure rolls 311, 313. The difference is that 311n and 313n are also formed.

Specifically, in the electrode laminate manufacturing apparatus 300 of the present modified form 1, the roll surfaces 311a and 313a of the pressure rolls 311, 313 have axial grooves 111m and 113m of the pressure rolls 111 and 113 of the embodiment. Similarly, a plurality of axial grooves 311 m and 313 m extending in the axial directions LH1 and LH2 and distributed in the circumferential directions SH1 and SH2 are formed, respectively. Further, in the present modification 1, a plurality of roll surfaces 311a and 313a extending in the circumferential directions SH1 and SH2 over the entire circumference of the roll surfaces 311a and 313a and distributed at predetermined intervals in the axial directions LH1 and LH2. Circumferential grooves 311n and 313n are formed, respectively. The widths JM3 and JM4 of the circumferential SH1 of the circumferential grooves 311n and 313n are JM3 = JM4 = 8.0 mm. The manufacturing apparatus 300 of the present modification 1 also includes a warp regulating member 120 similar to the manufacturing apparatus 100 of the embodiment.

Even when the strip-shaped electrode laminate 2x is formed by using this manufacturing apparatus 300, the strip-shaped electrode laminate 2x has a compression portion 2p pressurized by a pair of pressure rolls 311, 313 and a pair of pressure rolls 311. , 313, a plurality of uncompressed portions 2q (which were sandwiched between the axial grooves 311 m and 313 m and were not pressurized) are alternately formed in the transport direction IH (longitudinal direction BH). .. Further, also in the present modified form 1, the portion 2t of the strip-shaped electrode laminate 2x where the end portion 11t of the positive electrode plate 11 in the transport direction IH is located is not pressurized and is designated as the uncompressed portion 2q.

On the other hand, since the warp regulating member 120 restricts the movement of the strip-shaped electrode laminate 1w before integration in the thickness direction DH, the pressure roll 311 is viewed as a whole of the strip-shaped electrode laminate 2x after pressurization. , 313 does not have axial grooves 311m and 313m, and the manufacturing apparatus 300 does not have the warp regulating member 120. It can be suppressed from occurring. Further, since each of the individual electrode laminates 2 obtained by cutting the strip-shaped electrode laminate 2x also has a plurality of compressed portions 2p and non-compressed portions 2q, it is possible to suppress the occurrence of a large warp over the whole. Other parts similar to those in the embodiment have the same effects as those in the embodiment.

(Deformation form 2)
Next, a second modification of the above embodiment will be described. In the electrode laminate manufacturing apparatus 100 of the embodiment, axial grooves 111 m and 113 m are formed on both of the pair of pressure rolls 111 and 113 (see FIG. 6). On the other hand, in the electrode laminate manufacturing apparatus 400 (see FIG. 9) of the present modified form 2, an axial groove 411 m is formed only on the roll surface 411a of one of the pressure rolls 411.

Specifically, the device 400 for manufacturing the electrode laminate of the present modified form 2 includes a pair of pressure rolls 411 and 413. Of these, the pressure roll 411 on one side (upper in FIG. 9) is the same as the pressure roll 111 of the embodiment. That is, on the roll surface 411a of the pressure roll 411, a plurality of axial grooves 411m extending in the axial direction LH1 and distributed in the circumferential direction SH1 are formed as in the axial groove 111m of the embodiment. On the other hand, no groove is formed on the roll surface 413a of the pressure roll 413 on the other side (lower side in FIG. 9). The manufacturing apparatus 400 of the present modification 2 also includes a warp regulating member 120 similar to the manufacturing apparatus 100 of the embodiment.

Even when the strip-shaped electrode laminate 3x is formed by using this manufacturing apparatus 400, the strip-shaped electrode laminate 3x has a compression portion 3p pressurized by a pair of pressure rolls 411 and 413 and a pair of pressure rolls 411. , The uncompressed portion 3q that was not pressurized by 413 (it was sandwiched between the axial groove 411 m of one pressure roll 411 and the roll surface 413a of the other pressure roll 413 and was not pressurized). , A plurality are alternately formed in the longitudinal direction BH (conveyance direction IH). Further, also in the present modified form 2, the portion 3t of the strip-shaped electrode laminate 3x where the end portion 11t of the positive electrode plate 11 in the transport direction IH is located is not pressurized and is designated as the uncompressed portion 3q.

On the other hand, since the warp regulating member 120 restricts the movement of the strip-shaped electrode laminate 1w before integration in the thickness direction DH, the pressure roll 411 as a whole of the strip-shaped electrode laminate 3x after pressurization. Compared with the case where the axial groove 411 m does not exist or the manufacturing apparatus 400 does not have the warp regulating member 120, it is possible to suppress the occurrence of a large warp in the entire transport direction IH (longitudinal direction BH) in the strip-shaped electrode laminate 3x. can. Further, since each of the individual electrode laminates 3 obtained by cutting the strip-shaped electrode laminate 3x also has a plurality of compressed portions 3p and non-compressed portions 3q, it is possible to suppress the occurrence of a large warp over the whole. Other parts similar to those in the embodiment have the same effects as those in the embodiment.

(Deformation form 3)
Next, a third modification of the above embodiment will be described. In the embodiment, in the pressurizing step S7, the strip-shaped electrode laminate 1x is formed by using the strip-shaped composite 51x and the plurality of rectangular positive electrode plates 11, and then in the cutting step S8, the strip-shaped electrode laminate 1x is formed in the longitudinal direction. A rectangular electrode laminate 1 was manufactured by cutting into BH at predetermined intervals. On the other hand, the present modified form 3 is different in that the rectangular electrode laminate 1 is manufactured (the band-shaped electrode laminate is not formed) by using the composite 51 and the positive electrode plate 11 which are previously rectangular, respectively. ..

Specifically, as in the embodiment (see FIG. 4), each step of the strip-shaped positive electrode plate forming step S1 to the strip-shaped second separator forming step S4 is performed (see FIG. 10). Further, the positive electrode plate forming step S5 is performed in the same manner as in the embodiment to form the rectangular positive electrode plate 11. Further, the band-shaped complex forming step S6 is performed in the same manner as in the embodiment to form the band-shaped complex 51x. Then, in the present modified form 3, in the complex forming step S16, the band-shaped complex 51x is cut at predetermined intervals in the longitudinal direction BH to obtain a rectangular complex 51.

Next, in the pressurizing step S17, the rectangular electrode laminate 1 is formed from the rectangular composite 51 and the rectangular positive electrode plate 11. The pressurizing step S17 of the second modification is also performed by using the electrode laminate manufacturing apparatus 100 of the embodiment (see FIGS. 6 and 7). Specifically, the positive electrode plate 11 cut in a rectangular shape is superposed on the second separator 31 of the complex 51 cut in a rectangular shape to form the electrode laminate 1y before integration. Then, the electrode laminate 1y before integration is continuously pressurized and integrated by the roll gap portion KG2 of the roll press portion 110 of the manufacturing apparatus 100. As a result, the rectangular electrode laminate 1 is formed.

In the electrode laminate 1 manufactured in this manner, a plurality of compressed portions 1p and non-compressed portions 1q are alternately formed in the vertical direction EH (conveyance direction IH, longitudinal direction BH) as in the embodiment. On the other hand, since the warp regulating member 120 regulates the movement of the electrode laminate 1y before integration in the thickness direction DH, a large warp occurs when the entire electrode laminate 1 after pressurization is viewed. Can be prevented.

In the above, the present invention has been described in accordance with the embodiments 1 to 3, but the present invention is not limited to the above-described embodiments 1 to 3 and does not deviate from the gist thereof. Needless to say, it can be changed and applied as appropriate.
In the first and second embodiments, the strip-shaped first separator 41x and the strip-shaped second separator 31x are bonded to the strip-shaped negative electrode plate 21x in advance to form the strip-shaped composite 51x, and in the pressurizing step S7, the strip-shaped composite is formed. A plurality of positive electrode plates 11 are laminated on 51x, and these are integrated to form a strip-shaped electrode laminate 1x, but the present invention is not limited to this.
For example, only the strip-shaped first separator 41x is adhered to the strip-shaped negative electrode plate 21x to form the first strip-shaped composite, while the strip-shaped second separator 31x and the plurality of positive electrode plates 11 are bonded to each other to form the second strip-shaped composite. Is formed. Then, in the pressurizing step S7, the first band-shaped complex and the second band-shaped complex may be laminated and integrated to form the band-shaped electrode laminated body 1x.
Further, in the pressurizing step S7, the strip-shaped first separator 41x, the strip-shaped negative electrode plate 21x, the strip-shaped second separator 31x, and the plurality of positive electrode plates 11 are laminated and integrated without forming the strip-shaped composite as described above. The strip-shaped electrode laminate 1x may be formed.

Further, in the modified form 3, a rectangular composite 51 in which the first separator 41 and the second separator 31 are adhered to the negative electrode plate 21 is formed in advance, and in the pressurizing step S7, the composite 51 and the positive electrode plate 11 are formed. And were laminated and integrated to form a rectangular electrode laminate 1, but the present invention is not limited to this.
For example, a first complex in which only the first separator 41 is adhered to the negative electrode plate 21 and a second complex in which the second separator 31 and the positive electrode plate 11 are adhered are formed. Then, in the pressurizing step S17, the first complex and the second complex may be laminated and integrated to form a rectangular electrode laminate 1.
Further, in the pressurizing step S17, the first separator 41, the negative electrode plate 21, the second separator 31, and the positive electrode plate 11, which are rectangular, are laminated and integrated without forming the complex as described above. It may be formed into a rectangular electrode laminate 1.

Further, in the embodiment, the widths JM1 and JM2 of the axial grooves 111m and 113m are uniformly set to the same size (8.0 mm) for both the axial grooves 111m and 113m, but the axial grooves 111m and 113m have the same size. The widths JM1 and JM2 can be different sizes. For example, of the axial grooves 111m and 113m, the widths JM1 of the axial grooves 111m and 113m for forming the portion 1t of the strip-shaped electrode laminate 1x where the end portion 11t of the positive electrode plate 11 is located as the uncompressed portion 1q. Regarding JM2, considering the size of the gap between the ends 11t and 11t of the positive electrode plates 11 and 11 adjacent to the transport direction IH, the widths of the other axial grooves 111m and 113m are different from those of JM1 and JM2. Can be. Similarly, for the axial grooves 311 m, 313 m, and 411 m according to the modified forms 1 and 2, the widths JM1 and JM2 of the axial grooves 311 m, 313 m, and 411 m can be made different sizes.

Further, in the embodiment, the distances KM1 and KM2 in the circumferential directions SH1 and SH2 between the axial grooves 111m and 113m are uniformly set to the same size (16.0mm), but the distance between the axial grooves 111m and 113m KM1. , KM2 can be of different sizes. Similarly, the distances KM1 and KM2 between the axial grooves 311m, 313m and 411m according to the modified forms 1 and 2 are different from the distances KM1 and KM2 between the axial grooves 311m, 313m and 411m. It can also be the size.

1,2,3 Electrode laminate 1p, 2p, 3p Compressed part 1q, 2q, 3q Non-compressed part 1x, 2x, 3x Band-shaped electrode laminate 1t, 2t, 3t (where the end of the positive electrode plate is located) Part 1w integrated Strip-shaped electrode laminate before conversion 1y Electrode laminate before integration 11 Positive electrode plate (second electrode plate)
11x strip-shaped positive electrode plate (belt-shaped second electrode plate)
11t (vertical direction of positive electrode plate) End 21 Negative electrode plate (first electrode plate)
21x strip-shaped negative electrode plate (belt-shaped first electrode plate)
31 2nd Separator 31x Band-shaped 2nd Separator 41 1st Separator 41x Band-shaped 1st Separator 51 Composite 51x Band-shaped Composite 100, 300, 400 Electrode Laminate Manufacturing Equipment 111, 113, 311, 313, 411, 413 Pressurizing Roll 111a, 113a, 311a, 313a, 411a, 413a Roll surface 111m, 113m, 311m, 313m, 411m Axial groove 311n, 313n Circumferential groove 120 Warp regulation member 121 Upper regulation member 123 Lower regulation member BH Longitudinal DH Thickness direction EH Vertical direction IH Transport direction JA Insertion side LH1, LH2 (pressurized roll) Axial direction SH1, SH2 (pressurized roll) circumferential direction EM1 (vertical direction of positive electrode plate) Dimension EM2 (negative electrode plate and electrode laminate) Dimensions (in the vertical direction) KG2 Roll gap S5 Positive electrode plate forming step S6 Band-shaped composite forming step S7, S17 Pressurizing step S8 Cutting step S16 Composite forming step

Claims (1)

An electrode laminate manufacturing apparatus for manufacturing an electrode laminate in which a first separator, a first electrode plate, a second separator, and a second electrode plate are laminated in this order and integrated.
The electrode laminate before integration, in which the first separator, the first electrode plate, the second separator, and the second electrode plate are laminated in this order but not integrated, or
The strip-shaped first separator which becomes the first separator by cutting, the strip-shaped first electrode plate which becomes the first electrode plate by cutting, the strip-shaped second separator which becomes the second separator by cutting, and the strip-shaped second separator which becomes the second separator by cutting, and arranged in a row in the transport direction. A strip-shaped electrode laminate before integration, in which the plurality of second electrode plates are laminated in this order but not integrated,
A pair of pressure rolls that continuously pressurize and integrate in the thickness direction in the roll gap,
It is arranged on the insertion side of the roll gap, and with the pressurization by the pair of pressure rolls, the electrode laminate before integration or the strip-shaped electrode laminate before integration is applied on the insertion side of the roll gap. It is equipped with a warp regulating member that regulates the movement of the body in the thickness direction.
On the roll surface of at least one of the pair of pressure rolls,
Extends in the axial direction of the pressure roll and
In the electrode laminate, a plurality of compressed portions pressurized by the pair of pressure rolls and non-compressed portions not pressurized by the pair of pressure rolls are alternately generated in the transport direction. An apparatus for manufacturing an electrode laminate having a plurality of axial grooves distributed in the circumferential direction of the pressure roll.

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