Electrode roll replacement system

Abstract

The disclosed electrode roll replacement system includes: a pneumatic chuck shaft in the form of a cantilever, the pneumatic chuck shaft including a first transfer mechanism mounted inside a hollow portion with a longitudinal direction of the shaft as a transfer direction, and exposing a first transfer surface of the first transfer mechanism on a surface thereof; and an electric trolley provided with a transfer shaft in the form of a cantilever, the transfer shaft including a second transfer mechanism mounted inside the hollow portion with a longitudinal direction of the shaft as a transfer direction, and a second transfer surface of the second transfer mechanism being exposed on a surface thereof, wherein the first transfer mechanism and the second transfer mechanism are electrically operated to exchange reels between the pneumatic chuck shaft and the transfer shaft with the transfer shaft of the motorized trolley being concentrically aligned with the pneumatic chuck shaft.

Description

Technical Field

[0001] The present disclosure relates to an electrode roll replacement system capable of easily performing replacement of a heavy electrode roll on a pneumatic chuck shaft without manual intervention in a production process of a secondary battery in which electrodes are transferred in a roll-to-roll manner.

[0002] This application claims the benefit of priority from Korean Patent Application No. 10-2023-0103497, filed on August 8, 2023, the disclosure of which is incorporated herein by reference. Background Art

[0003] Unlike primary batteries, secondary batteries are rechargeable and have been extensively researched and developed in recent years due to their potential for miniaturization and large capacity. Demand for secondary batteries as energy sources is rapidly increasing due to technological developments, increased demand for mobile devices, and the growing importance of electric vehicles and energy storage systems in response to environmental protection needs.

[0004] Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries based on the shape of the battery case. In a secondary battery, an electrode assembly mounted inside the battery case is a chargeable and dischargeable power generating device consisting of a stacked structure of electrodes and separators.

[0005] Electrode assemblies can be roughly classified into a jelly roll type, in which sheet-type positive and negative electrodes applied with active materials are wound with a separator interposed therebetween; a stack type, in which multiple positive and negative electrodes are stacked sequentially with a separator interposed therebetween; and a stack & folding type, in which unit cells are stacked while being wound with a long separator.

[0006] Electrodes are manufactured by coating active materials on current collectors to form electrode sheets, slitting the electrode sheets, winding them onto reels and drying them, and unwinding the electrode sheets from the reels and cutting them to size. In this way, various processes for processing electrodes for secondary batteries are continuously performed in a roll-to-roll manner, and the electrode rolls are loaded and unloaded on the pneumatic chuck shafts of the unwinder and rewinder equipment.

[0007] Conventional, standard-sized electrode rolls are transported on a motorized trolley and pushed onto a pneumatic chuck shaft by an operator for replacement. As equipment speed increases, the electrode roll replacement cycle shortens, while larger electrode roll volumes increase the replacement cycle, thereby increasing equipment utilization. However, due to the weight restrictions on the manpower required to replace the electrode rolls, there are limitations on increasing the volume of rolls. Summary of the Invention

[0008] Technical issues

[0009] An object of the present disclosure is to provide an electrode roll replacement system that can increase the winding amount of an electrode roll without being restricted by weight and can improve equipment utilization by establishing an automated system that uses electricity instead of manpower when replacing electrode rolls on a pneumatic chuck shaft of an unwinder and rewinder device.

[0010] However, the technical problems to be solved by the present disclosure are not limited to the above-mentioned problems, and other problems not mentioned will be apparent to those of ordinary skill in the art from the description of the present disclosure set forth below.

[0011] Technical Solution

[0012] The present disclosure relates to an electrode roll replacement system, in one example, the electrode roll replacement system includes: a pneumatic chuck shaft in a cantilever form, the pneumatic chuck shaft including a first conveying mechanism installed inside a hollow portion with the length direction of the shaft as the conveying direction, and a first conveying surface of the first conveying mechanism is exposed on a surface thereof; and an electric trolley, the electric trolley is provided with a cantilevered transmission shaft, the transmission shaft including a second conveying mechanism installed inside a hollow portion with the length direction of the shaft as the conveying direction, and a second conveying surface of the second conveying mechanism is exposed on a surface thereof, wherein when the transmission shaft of the electric trolley is concentrically aligned with the pneumatic chuck shaft, the first conveying mechanism and the second conveying mechanism are electrically operated to exchange rolls between the pneumatic chuck shaft and the transmission shaft.

[0013] In one embodiment, the first and second conveying mechanisms are each a conveyor belt, wherein the movement of the reel is generated by frictional forces acting between the conveyor belt and the inner peripheral surface of the reel.

[0014] In another embodiment, the first and second transport mechanisms are each a plurality of pinion gears, wherein the movement of the reel is generated by meshing of the pinion gears with a rack gear formed on an inner peripheral surface of the reel.

[0015] Here, the plurality of pinion gears may include at least one driving gear and at least one driven gear directly or indirectly meshed with and rotating on the driving gear.

[0016] Furthermore, the plurality of pinions are arranged in a row along the length direction of the shaft, wherein odd-numbered pinions or even-numbered pinions may form the first transmission surface and the second transmission surface.

[0017] In this embodiment of the present disclosure, the transmission shaft of the electric trolley is docked and interconnected with the pneumatic chuck shaft, wherein the relative position of the pneumatic chuck shaft docked with the transmission shaft of the electric trolley is restricted to a predetermined position so that the first transmission surface and the second transmission surface are aligned.

[0018] In addition, the first conveying mechanism and the second conveying mechanism may be powered by power supplies independent of each other.

[0019] Alternatively, the power for operating the first and second conveying mechanisms may be supplied from a power source of the electric carriage.

[0020] For example, by docking the transmission shaft of the electric trolley with the pneumatic chuck shaft, power from the electric trolley may be supplied to the first transfer mechanism.

[0021] In addition, the relative position of the pneumatic chuck shaft docking with the transmission shaft of the electric trolley is limited to a predetermined position, wherein through the docking of the pneumatic chuck shaft with the transmission shaft of the electric trolley, the first transmission surface and the second transmission surface can be aligned and power from the electric trolley can be supplied to the first transmission mechanism.

[0022] Beneficial effects

[0023] The electrode roll replacement system of the present disclosure, having the above-described configuration, includes an air chuck shaft and a transfer shaft of an electric trolley, each of which is provided in an unwinder or rewinder and has a built-in reel transfer mechanism. The air chuck shaft and the transfer shaft can be combined so that the transfer shaft is concentric with the air chuck shaft. Thus, by operating the first transfer mechanism and the second transfer mechanism, a reel mounted on the air chuck shaft or the transfer shaft can be transferred from the air chuck shaft to the transfer shaft, and vice versa.

[0024] Therefore, by respectively building in electrically operated conveying mechanisms on the pneumatic chuck shaft and the transmission shaft, heavy electrode rolls can be discharged from the pneumatic chuck shaft of the rewinder or loaded into the pneumatic chuck shaft of the unwinder without manual intervention, thereby enabling the electrode roll replacement system of the present disclosure to increase the amount of wound electrode rolls, thereby freeing it from the weight restrictions brought about by manual intervention, thereby improving equipment utilization.

[0025] However, the technical effects of the present invention are not limited to those described above, and other effects not mentioned will be apparent to those of ordinary skill in the art from the description of the present invention set forth below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Since the following drawings attached to the present application illustrate exemplary embodiments of the present disclosure and are used to facilitate understanding of the technical idea of ​​the present disclosure together with the detailed description of the present disclosure described below, the present disclosure should not be limited to the matters described in the drawings.

[0027] Figure 1 is a diagram illustrating the overall configuration of an electrode roll replacing system according to the present disclosure.

[0028] Figure 2 is a diagram illustrating one embodiment of a pneumatic chuck shaft.

[0029] Figure 3 It is along Figure 2 A cross-sectional view taken along line "AA" is shown in FIG.

[0030] Figure 4 This is a diagram illustrating one embodiment of a transmission shaft of an electric trolley.

[0031] Figure 5 It is a diagram illustrating the butted ends of the air chuck shaft and the transmission shaft.

[0032] Figure 6 This is a diagram illustrating the state of replacing the electrode roll along the air chuck axis and the transmission axis.

[0033] Figure 7 is a diagram illustrating another embodiment of an air chuck shaft and a transmission shaft.

[0034] Figure 8 It is a diagram illustrating one embodiment of a first transmission mechanism for supplying power of an electric trolley to a butt end portion of a pneumatic chuck shaft. DETAILED DESCRIPTION

[0035] The present disclosure can have various modifications and various embodiments, so specific embodiments thereof will be described in detail below.

[0036] However, it should be understood that the present disclosure is not limited to specific embodiments and includes all modifications, equivalents, or replacements within the spirit and technical scope of the present disclosure.

[0037] The terms "including" or "having" used in this document indicate the presence of features, numbers, steps, actions, parts, components or combinations thereof described in the present application, and it should be understood that the possibility of the presence or addition of one or more other features, numbers, steps, actions, parts, components or combinations thereof is not precluded.

[0038] Furthermore, in the present disclosure, when a portion of a layer, film, region, plate, or the like is disposed "on" another portion, this includes not only the case where the portion is disposed "directly" "on" another portion, but also the case where another portion is interposed therebetween. Conversely, when a portion of a layer, film, region, plate, or the like is disposed "below" another portion, this includes not only the case where the portion is disposed "directly" "below" another portion, but also the case where another portion is interposed therebetween. Furthermore, in the present application, "on" may include not only the case where the portion is disposed "on" an upper portion, but also the case where the portion is disposed "on" a lower portion.

[0039] The present disclosure relates to an electrode roll replacement system, in one example, the electrode roll replacement system includes: a pneumatic chuck shaft in a cantilever form, the pneumatic chuck shaft including a first conveying mechanism installed inside a hollow portion with the length direction of the shaft as the conveying direction, and a first conveying surface of the first conveying mechanism is exposed on a surface thereof; and an electric trolley, the electric trolley is provided with a transmission shaft in a cantilever form, the transmission shaft including a second conveying mechanism installed inside the hollow portion with the length direction of the shaft as the conveying direction, and a second conveying surface of the second conveying mechanism is exposed on a surface thereof, wherein with the transmission shaft of the electric trolley concentrically aligned with the pneumatic chuck shaft, the first conveying mechanism and the second conveying mechanism are electrically operated to exchange the rolls between the pneumatic chuck shaft and the transmission shaft.

[0040] The pneumatic chuck shaft and the transport shaft of the electric trolley provided in the unwinder or rewinder each include a mechanism for transporting the reel, and can be coupled (jointed) so that the transport shaft is concentric with the pneumatic chuck shaft. Thus, by operating the first transport mechanism and the second transport mechanism, a reel mounted on the pneumatic chuck shaft or the transport shaft can be transported from the pneumatic chuck shaft to the transport shaft, and vice versa.

[0041] Therefore, by respectively building in electrically operated conveying mechanisms on the pneumatic chuck shaft and the transmission shaft, heavy electrode rolls can be discharged from the pneumatic chuck shaft of the rewinder or loaded into the pneumatic chuck shaft of the unwinder without manual intervention, thereby enabling the electrode roll replacement system of the present disclosure to increase the amount of wound electrode rolls, thereby freeing it from the weight restrictions brought about by manual intervention, thereby improving equipment utilization.

[0042] Modes for Carrying Out the Invention

[0043] Hereinafter, with reference to the accompanying drawings, a specific embodiment of the electrode roll replacement system 10 according to the present disclosure will be described in detail. For reference, the front-back, top-bottom, and left-right directions used in the following description to designate relative positions are intended to help understand the present disclosure, and unless otherwise defined, reference is made to the directions shown in the accompanying drawings.

[0044] [First embodiment]

[0045] Figure 1 This figure illustrates the overall configuration of an electrode roll replacement system 10 according to the present disclosure. The electrode roll replacement system 10 of the present disclosure includes: an air chuck shaft 110 having a built-in electrically operated first conveying mechanism 120; and an electric trolley 200 equipped with a transfer shaft 210, similarly equipped with a built-in electrically operated second conveying mechanism 220. An electrode roll 500, i.e., an electrode 520 wound around a cylindrical reel 510, is inserted into and mounted on the air chuck shaft 110 and the transfer shaft 210. Therefore, the air chuck shaft 110 and the transfer shaft 210 have the same outer diameter, corresponding to the inner diameter of the reel 510.

[0046] The pneumatic chuck shaft 110 is provided in the unwinder or rewinder 100 in a cantilevered manner to allow the insertion and removal of the electrode roll 500. Similarly, the transport shaft 210 is provided in the electric trolley 200 having travel capability in a cantilevered manner, and the electrode roll 500 is mounted on the transport shaft 210 for movement. The electric trolley 200 may be an operator-operated trolley or an automated guided vehicle (AGV).

[0047] Figure 2 is a diagram illustrating one embodiment of a pneumatic chuck shaft 110, Figure 3 1 is a cross-sectional view of the pneumatic chuck shaft 110 along line "AA". The pneumatic chuck shaft 110 includes a first conveying mechanism 120 installed inside the hollow portion with the length direction of the shaft 112 as the conveying direction, and a first conveying surface 122 of the first conveying mechanism 120 is exposed on its surface. Figure 2 In the embodiment shown in , the first conveying mechanism 120 is configured as a conveyor belt 300 , and a surface of the conveyor belt 300 is exposed to the outside of the shaft 112 to form a first conveying surface 122 .

[0048] The first conveying mechanism 120 may include one or more than two conveying belts 300 . If there are a plurality of conveying belts 300 , they may be evenly arranged along the circumferential direction of the shaft 112 . Figure 2 and Figure 3 Also shown is a pneumatic clamping rubber 140. The pneumatic clamping rubber 140 is a pneumatically actuated clamping mechanism capable of advancing and retracting radially along the pneumatic chuck shaft 110. When pneumatic pressure is applied, the pneumatic clamping rubber 140 advances radially. The advancing pneumatic clamping rubber 140 frictionally grips the inner circumferential surface of the reel 510, thereby clamping the electrode reel 500. Conversely, when the pneumatic pressure is removed, the clamping action is released. Since this clamping action of the pneumatic chuck shaft 110 falls within the scope of techniques known in the art, it will not be described further.

[0049] Figure 4 This figure illustrates one embodiment of a transfer shaft 210 of an electric trolley 200. The transfer shaft 210, mounted in a cantilevered manner on the electric trolley, has a structure substantially similar to the pneumatic chuck shaft 110 described above. Specifically, the transfer shaft 210 includes a second transfer mechanism 220 mounted within a hollow portion, with the longitudinal direction of the shaft 212 serving as the transfer direction. A second transfer surface 222 of the second transfer mechanism 220 is exposed on the surface of the shaft 212.

[0050] However, it is not necessarily necessary to provide the pneumatic chucking rubber 140 on the transmission shaft 210. The main function of the pneumatic chucking rubber 140 provided on the pneumatic chuck shaft 110 is to firmly fix the reel 510 so that the rotational driving force of the pneumatic chuck shaft 110 is fully transmitted to the electrode roll 500. In this regard, unless there is a risk of the electrode roll 500 falling during transportation, it is unlikely that the pneumatic chucking rubber 140 will be required on the non-rotationally driven transmission shaft 210.

[0051] Figure 5 1 is a diagram illustrating one embodiment of the butted ends 130, 230 of the pneumatic chuck shaft 110 and the transmission shaft 210. As will be described later, movement of the electrode roll 500 is accomplished when the free ends of the pneumatic chuck shaft 110 and the transmission shaft 210 are concentrically aligned and in contact or connected with each other. Therefore, when the free ends of the pneumatic chuck shaft 110 and the transmission shaft 210 are concentrically aligned and connected with each other, and this is referred to as butting the pneumatic chuck shaft 110 and the transmission shaft 210, the free ends of the pneumatic chuck shaft 110 and the transmission shaft 210 may be referred to as butted ends 130, 230.

[0052] Therefore, when the transmission shaft 210 of the movable electric trolley 200 is docked and interconnected with respect to the fixedly mounted pneumatic chuck shaft 110, the relative position of the docking of the transmission shaft 210 of the electric trolley 200 with respect to the pneumatic chuck shaft 110 can be restricted to a predetermined position. Figure 5 As shown in FIG, a groove structure 132 for determining the bonding direction can be provided on the butt end portion 130 of the pneumatic chuck shaft 110. Figure 5 (a)}, and a complementary protrusion structure 232 may be provided on the butt end portion 230 of the transmission shaft 210 { Figure 5 Thus, the first conveying surface 122 of the air chuck shaft 110 and the second conveying surface 222 of the transmission shaft 210 may be aligned in a row.

[0053] Figure 61 is a diagram illustrating replacement of the electrode roll 500 along the pneumatic chuck shaft 110 and the transmission shaft 210. When the pneumatic chuck shaft 110 and the transmission shaft 210 are connected in a row, the electrode roll 500 on the pneumatic chuck shaft 110 or the transmission shaft 210 is moved to the other side by the electric operation of the first transmission mechanism 120 and the second transmission mechanism 220.

[0054] Figure 6 (a) illustrates an example of removing an empty reel 510 from the pneumatic chuck shaft 110 provided in the unwinder 100 apparatus and installing a new electrode roll 500 being transported on the electric trolley 200. After the butt end 130 of the pneumatic chuck shaft 110 and the butt end 230 of the transport shaft 210 are connected, the first conveying mechanism 120 and the second conveying mechanism 220 move the first conveying surface 122 and the second conveying surface 222 from right to left in the drawing, thereby moving the electrode roll 500 on the transport shaft 210 onto the pneumatic chuck shaft 110. In the illustrated embodiment, the first conveying mechanism 120 and the second conveying mechanism 220 are conveyor belts 300, wherein the movement of the electrode roll 500 is caused by the friction force acting between the conveyor belts 300 and the inner peripheral surface of the reel 510.

[0055] Figure 6 (b) is the opposite case, illustrating an example of transferring an electrode roll 500 wound on the pneumatic chuck shaft 110 provided in the rewinder 100 to the electric trolley 200. After the butt end 130 of the pneumatic chuck shaft 110 and the butt end 230 of the transmission shaft 210 are connected, the first transmission mechanism 120 and the second transmission mechanism 220 move the first transmission surface 122 and the second transmission surface 222 from left to right in the drawing, thereby transferring the electrode roll 500 on the pneumatic chuck shaft 110 to the transmission shaft 210.

[0056] During the opposite transport of the electrode roll 500 for supply or removal relative to the pneumatic chuck axis 110, the first transport mechanism 120 and the second transport mechanism 220 are of course operated in opposite directions. Figure 5 As shown in , when the docking position of the transmission shaft 210 relative to the pneumatic chuck shaft 110 is restricted to a predetermined position so that the first transmission surface 122 of the pneumatic chuck shaft 110 and the second transmission surface 222 of the transmission shaft 210 are aligned, the driving force of the moving electrode roll 500 of the first transmission mechanism 120 and the second transmission mechanism 220 is smoothly diffused, resulting in stable transmission.

[0057] [Second embodiment]

[0058] Figure 7 is a diagram illustrating another embodiment of the air chuck shaft 110 and the transmission shaft 210 , in which the first conveying mechanism 120 and the second conveying mechanism 220 are configured as gear mechanisms instead of the conveyor belt 300 .

[0059] Although Figure 7 An air chuck shaft 110 is illustrated, but it should be understood that Figure 7 The structure of can be applied to the transmission shaft 210, which will become apparent from the description of the first embodiment. Figure 7 The pneumatic chucking rubber 140 provided on the conventional pneumatic chuck shaft 110 is omitted, and it will be understood that such omission will not significantly affect the understanding of the present disclosure.

[0060] exist Figure 7 In the embodiment, the first conveying mechanism 120 built into the air chuck shaft 110 is a plurality of pinion gears 400, and the teeth of the pinion gears protruding from the air chuck shaft 110 form a first conveying surface 122. Accordingly, a rack gear 512 is formed on the inner circumferential surface of the reel 510, and the movement of the reel 510 is generated by the continuous meshing of the rack gear 512 on the inner circumferential surface of the reel 510 with the rotationally driven pinion gears 400.

[0061] Here, the plurality of pinions 400 may include at least one driving gear 410 and at least one driven gear 420 that is directly or indirectly meshed with the driving gear 410 and passively rotates. The plurality of pinions 400 are arranged in a row along the length of the air chuck shaft 110, and the pinions 400 that form the first conveying surface 122 protrude alternately one after another. For example, an odd-numbered pinion 400 or an even-numbered pinion 400 may form the first conveying surface 122 along the length of the shaft 112. This is because the rotation direction of the continuously meshed pinions 400 alternates between clockwise and counterclockwise directions, and therefore, it is necessary to form a first conveying surface 122 in which the pinions 400 rotate in the same direction in order to convey the reel 510.

[0062] For reference, although Figure 7 Although not shown, the plurality of pinions 400 may be mounted within a single frame structure such as a gearbox, which may simplify the installation of the plurality of pinions 400 within the pneumatic chuck shaft 110. Figure 5 As shown in the figure, the docking ends 130, 230 may be provided with a structure that limits the coupling direction to ensure that the first conveying surface 122 and the second conveying surface 222 are aligned in a row, thereby ensuring that the rack gear 512 on the inner circumferential surface of the reel 510 is continuously engaged with respect to the first conveying mechanism 120 and the second conveying mechanism 220.

[0063] [Third embodiment]

[0064] The third embodiment relates to an exemplary embodiment of powering the first conveyor mechanism 120 and the second conveyor mechanism 220. In the simplest case, the first conveyor mechanism 120 and the second conveyor mechanism 220 can be powered by independent power sources. That is, the first conveyor mechanism 120 can be powered by a power source (not shown) of the unwinder / rewinder 100 device on which the pneumatic chuck shaft 110 is mounted, while the second conveyor mechanism 220 can be powered by a power source 240 of the electric trolley 200 provided with the transmission shaft 210.

[0065] However, since the air chuck shaft 110 has an air chuck mechanism built in, and the shaft 112 rotates to rotate the electrode roll 500 , the structure of the power supply inside the air chuck shaft 110 may be somewhat complicated. Figure 8 2 is an exemplary diagram of a third embodiment, in which a power source 240 from an electric trolley 200 is supplied to a first conveying mechanism 120 of an air chuck shaft 110 to further simplify the internal structure of the air chuck shaft 110 .

[0066] Figure 8 This diagram illustrates one embodiment of supplying power 240 from the electric trolley 200 to the docking ends 130, 230 of the first conveying mechanism 120 of the pneumatic chuck shaft 110. By docking the transfer shaft 210 of the electric trolley 200 relative to the pneumatic chuck shaft 110, the power 240 from the electric trolley 200 can be supplied to the first conveying mechanism 120. For example, the docking end 130 of the pneumatic chuck shaft 110 forms a socket 132 with a recessed structure, and the docking end 230 of the transfer shaft 210 forms a plug 232 with a protruding structure, thereby mechanically and electrically connecting the pneumatic chuck shaft 110 and the transfer shaft 210. Thus, the power 240 from the electric trolley 200 can be supplied to both the first conveying mechanism 120 and the second conveying mechanism 220.

[0067] exist Figure 8 In the exemplary embodiment shown in , the docking position of the transmission shaft 210 relative to the pneumatic chuck shaft 110 is limited to a predetermined position by a groove structure 132 and a protrusion structure 232 that specify the coupling direction, which enables the power supply 240 of the electric trolley 200 to be supplied to the first conveying mechanism 120 and the first conveying surface 122 and the second conveying surface 222 to be aligned.

[0068] The present disclosure has been described in more detail above with reference to the accompanying drawings and embodiments. However, it should be understood that the configuration shown in the accompanying drawings or embodiments described herein is only one embodiment of the present disclosure and does not represent all technical concepts of the present disclosure. Various equivalents and modifications that can replace them may exist when the present disclosure is submitted.

[0069] [Description of Reference Signs]

[0070] 10: Electrode roll replacement system 100: Unwinder / Rewinder

[0071] 110: Pneumatic chuck shaft 112: Shaft

[0072] 120: First conveying mechanism 122: First conveying surface

[0073] 130: docking end 132: groove structure (socket)

[0074] 140: Pneumatic clamping rubber 200: Electric trolley

[0075] 210: Transmission shaft 212: Shaft

[0076] 220: Second conveying mechanism 222: Second conveying surface

[0077] 230: docking end 232: protrusion structure (plug)

[0078] 240: Power supply 300: Conveyor belt

[0079] 400: Pinion 410: Drive gear

[0080] 420: driven gear 500: electrode roll

[0081] 510: reel 512: rack and pinion

[0082] 520: Electrode.

Claims

1. An electrode roll replacement system comprising: A cantilevered pneumatic chuck shaft comprising a first conveying mechanism installed inside the hollow portion with the longitudinal direction of the shaft as the conveying direction, and having a first conveying surface of the first conveying mechanism exposed on its surface; as well as An electric trolley provided with a cantilevered transmission shaft, the transmission shaft including a second transmission mechanism installed inside a hollow portion with the longitudinal direction of the shaft as a transmission direction, and a second transmission surface of the second transmission mechanism exposed on its surface, wherein With the transfer shaft of the motorized trolley concentrically aligned with the pneumatic chuck shaft, the first and second transfer mechanisms are electrically operated to exchange reels between the pneumatic chuck shaft and the transfer shaft.

2. The electrode roll replacement system according to claim 1, wherein The first conveying mechanism and the second conveying mechanism are each a conveyor belt, wherein The movement of the reel is caused by frictional forces acting between the conveyor belt and the inner peripheral surface of the reel.

3. The electrode roll replacement system according to claim 1, wherein The first transmission mechanism and the second transmission mechanism are each a plurality of small gears, wherein The movement of the reel is caused by meshing of the pinion gear with a rack gear formed on the inner peripheral surface of the reel.

4. The electrode roll replacement system according to claim 3, wherein The plurality of pinion gears include: at least one driving gear and at least one driven gear that rotates in direct or indirect meshing engagement with the driving gear.

5. The electrode roll replacement system according to claim 4, wherein The plurality of pinions are arranged in a row along the length direction of the shaft, wherein The odd-numbered pinions or the even-numbered pinions form the first transmission surface and the second transmission surface.

6. The electrode roll replacement system according to claim 2 or 3, wherein The transmission shaft of the electric trolley is docked and interconnected with the pneumatic chuck shaft, wherein The relative position of the air chuck shaft abutting the transfer shaft of the electric trolley is restricted to a predetermined position so that the first transfer surface and the second transfer surface are aligned.

7. The electrode roll replacement system according to claim 1, wherein The first conveying mechanism and the second conveying mechanism are powered by power supplies independent of each other.

8. The electrode roll replacement system according to claim 1, wherein Electric power for operating the first and second transport mechanisms is supplied from a power source of the electric carriage.

9. The electrode roll replacement system according to claim 8, wherein By docking the transmission shaft of the electric trolley with the air chuck shaft, power from the electric trolley is supplied to the first conveying mechanism.

10. The electrode roll replacement system according to claim 9, wherein The relative position of the pneumatic chuck shaft and the transmission shaft of the electric trolley is limited to a predetermined position, wherein By docking the air chuck shaft with the transfer shaft of the electric trolley, the first and second conveying surfaces are aligned and power from the electric trolley is supplied to the first conveying mechanism.

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