Electrode body decomposition method and electrode body decomposition device

Abstract

The present application provides an electrode body decomposition method and an electrode body decomposition device, which increase the recovery rate of electrode materials. The decomposition method of an electrode body (1) includes: an electrode body preparation step (S10) of preparing an electrode body (1) in which a strip-shaped negative electrode sheet and a strip-shaped positive electrode sheet are stacked with a strip-shaped first separator sheet (2) and a strip-shaped second separator sheet (4) therebetween and wound in a predetermined winding direction; and a separation step (S30) of pulling the first separator sheet (2) and the second separator sheet (4), and extracting and separating the first separator sheet (2), the negative electrode sheet, the second separator sheet (4), and the positive electrode sheet.

Description

Technical Field

[0001] This invention relates to a method and apparatus for disassembling electrode bodies. Background Technology

[0002] Japanese Patent Application Publication No. 2013-004299 discloses a method for recycling lithium-ion secondary batteries to recover usable materials such as nickel from used lithium-ion secondary batteries. In the method disclosed in this publication, discharged lithium-ion secondary batteries are broken into small pieces, and these pieces are immersed in a polar solvent to form a mixture of different components. By stirring, sieving, and separating this mixture, usable electrode materials can be recovered.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-004299 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the inventors of this application intend to improve the recovery rate of the electrode material.

[0008] Solution for solving the problem

[0009] The proposed electrode body decomposition method includes: a step of preparing an electrode body in which a strip-shaped negative electrode and a strip-shaped positive electrode are laminated and wound in a specified winding direction through a strip-shaped first diaphragm and a strip-shaped second diaphragm; and a separation step of pulling the first diaphragm and the second diaphragm to extract and separate the first diaphragm, the negative electrode, the second diaphragm, and the positive electrode.

[0010] The above-mentioned electrode body decomposition method can improve the recovery rate of electrode materials.

[0011] The electrode body separation device proposed herein separates an electrode body having a strip-shaped positive electrode and a strip-shaped negative electrode laminated on a strip-shaped first diaphragm and a strip-shaped second diaphragm, and wound in a predetermined winding direction. The electrode body separation device comprises: a first holding portion holding the outer winding end (first outer end) of the first diaphragm; a first clamping roller clamping and pulling out the first diaphragm; a first moving device moving the first holding portion such that the first diaphragm is guided into the first clamping roller; a second holding portion holding the outer winding end (second outer end) of the second diaphragm; a second clamping roller clamping and pulling out the second diaphragm; a second moving device moving the second holding portion such that the second diaphragm is guided into the second clamping roller; and a control device. The control device is configured to perform the following processes: the first gripping part gripping the first outer end; the second gripping part gripping the second outer end; and the first moving device moving the first gripping part to introduce the first diaphragm into the first clamping roller, and the second moving device moving the second gripping part to introduce the second diaphragm into the second clamping roller, and the process of extracting the first diaphragm and the second diaphragm.

[0012] The electrode body decomposition device described above can achieve the same effect as the electrode body decomposition method described above. Attached Figure Description

[0013] Figure 1 This is a partial cross-sectional perspective view of the electrode body 1 according to one embodiment.

[0014] Figure 2 This is a perspective view of the electrode body decomposition device 10.

[0015] Figure 3 This is a perspective view of the electrode housing 20.

[0016] Figure 4 This is a top view of the electrode housing 20.

[0017] Figure 5 This is a three-dimensional view of the area surrounding the electrode housing 20.

[0018] Figure 6 This is a partial cross-sectional view of the area surrounding the electrode housing 20 when the cylinder 24b is extended.

[0019] Figure 7 This is a perspective view of the first separation device 50.

[0020] Figure 8 This is a perspective view of the first separation device 50 with the scraper 52 inserted in the curved portion R1a of the transport path R1.

[0021] Figure 9 This is a perspective view of the second separation device 150.

[0022] Figure 10 This is a perspective view of the second separation device 150 with the stripping roller 153 in a downward state.

[0023] Figure 11 This is a flowchart illustrating the process of decomposing electrode 1.

[0024] Figure 12 This is a perspective view of the first transport unit 40 and the first separation device 50 during the transport of the first diaphragm sheet 2.

[0025] Figure 13 This is a front view of the second transport section 140 and the second separation device 150 during the transport of the second diaphragm sheet 4. Detailed Implementation

[0026] The following describes one embodiment of the electrode body decomposition device. It should be noted that this embodiment is not intended to limit the invention in any particular way. Hereinafter, components and parts that perform the same function will be labeled with the same reference numerals, and descriptions will be omitted or simplified as appropriate.

[0027] In this specification, "energy storage device" is a general term for all devices capable of extracting electrical energy, including primary and secondary batteries, as well as chemical batteries such as lithium-ion batteries or nickel-metal hydride batteries, and physical batteries such as double-layer capacitors.

[0028] [Construction of the electrode]

[0029] Figure 1 This is a partial cross-sectional perspective view of the electrode body 1 according to one embodiment. The electrode body 1 is constructed using the electrode body disassembly apparatus 10 according to this embodiment (see reference 10). Figure 2 The object to be decomposed. Electrode 1 is removed from the energy storage device, which includes the battery casing containing it, electrode terminals, electrolyte, etc. The type of electrode 1 is not particularly limited; for example, it is an electrode of a lithium-ion secondary battery. Various methods for removing electrode 1 from the energy storage device have been proposed, without particular limitation.

[0030] like Figure 1As shown, electrode body 1 is sequentially laminated with a strip-shaped first diaphragm 2, a strip-shaped negative electrode 3, a strip-shaped second diaphragm 4, and a strip-shaped positive electrode 5, and wound in a predetermined winding direction. Electrode body 1 is a so-called wound electrode body. Here, electrode body 1 is wound in the order of the first diaphragm 2, the negative electrode 3, the second diaphragm 4, and the positive electrode 5, starting from the outermost periphery. The first diaphragm 2 and the second diaphragm 4 are configured such that their length in the longitudinal direction (circumferential direction of winding) is longer than that of the negative electrode 3 and the positive electrode 5. The winding end portion of electrode body 1 is composed of the first diaphragm 2 and the second diaphragm 4.

[0031] For the first diaphragm sheet 2 and the second diaphragm sheet 4, porous resin sheets with the required heat resistance and electrolyte permeability can be used, for example. The materials of the first diaphragm sheet 2 and the second diaphragm sheet 4 are not particularly limited. The first diaphragm sheet 2 and the second diaphragm sheet 4 are sandwiched between the positive electrode sheet 5 and the negative electrode sheet 3, insulating the positive electrode sheet 5 and the negative electrode sheet 3. The first diaphragm sheet 2 and the second diaphragm sheet 4 can also be adhesive diaphragms coated with adhesive on both sides. In this case, the first diaphragm sheet 2, the negative electrode sheet 3, the second diaphragm sheet 4, and the positive electrode sheet 5 are bonded together.

[0032] The negative electrode 3 includes a negative electrode current collector foil 3a and a negative electrode active material layer 3b formed on the negative electrode current collector foil 3a. The negative electrode 3 is a component in which a negative electrode active material layer 3b containing the negative electrode active material is formed on the surface of the negative electrode current collector foil 3a. Here, the negative electrode current collector foil 3a is composed of copper foil of a predetermined width and thickness. The negative electrode active material is, for example, a material like natural graphite that can absorb lithium ions during charging and release the lithium ions absorbed during charging during discharging. Various alternatives to natural graphite have been proposed for the negative electrode active material, and there is no particular limitation. In the case where the energy storage device is a device other than a lithium-ion secondary battery, the negative electrode 3 may include various negative electrode current collector foils 3a and negative electrode active material layers 3b corresponding to the type of energy storage device.

[0033] The positive electrode 5 includes a positive electrode current collector foil 5a and a positive electrode active material layer 5b formed on the positive electrode current collector foil 5a. The positive electrode 5 is a component on which the positive electrode active material layer 5b containing the positive electrode active material is formed on the surface of the positive electrode current collector foil 5a. Here, the positive electrode current collector foil 5a is composed of aluminum foil of a predetermined width and thickness. The positive electrode active material is, for example, a material like a lithium transition metal composite material that can release lithium ions during charging and absorb lithium ions during discharging. Various options for the positive electrode active material have been proposed besides lithium transition metal composite materials, and there is no particular limitation. When the energy storage device is a device other than a lithium-ion secondary battery, the positive electrode 5 may include various positive electrode current collector foils 5a and positive electrode active material layers 5b corresponding to the type of energy storage device.

[0034] The above describes the structure of electrode body 1. However, in the process of recycling used secondary batteries, there is a strong demand for the recovery of metals such as nickel, cobalt, and manganese (so-called rare metals). When recycling secondary batteries, if the secondary battery is broken, the metal to be recovered will mix with other metals, resulting in a low recovery rate of the metal to be recovered. Therefore, the inventors of this application believe that if the positive and negative electrodes of the electrode body can be separated without breaking them, the recovery rate of the metal to be recovered can be increased.

[0035] [Overview of the electrode body decomposition device]

[0036] Figure 2 This is a perspective view of the electrode body decomposition device 10. For convenience, the following will be... Figure 2 The left and right directions are called the left and right directions. Figure 2 The direction of depth is called the front-to-back direction. In the attached diagram, front, back, left, right, top, and bottom are represented by the symbols F, Rr, L, R, U, and D, respectively. Figure 2 As shown, the electrode body separation device 10 includes an electrode body receiving section 20, a first holding section 30, a first transport section 40, a first separation device 50, a first diaphragm recovery section 60, a negative electrode recovery section 70, a second holding section 130, a second transport section 140, a second separation device 150, a second diaphragm recovery section 160, a positive electrode recovery section 170, a positive and negative electrode separation device 80, and a control device 100.

[0037] The electrode body 1, before disassembly, is placed in the electrode body receiving section 20. The electrode body disassembly device 10 is configured to unwind the wound electrode body 1 by pulling the first diaphragm 2 and the second diaphragm 4. During the unwinding process, the electrode body 1 moves approximately around the winding axis W (see reference 20) inside the electrode body receiving section 20. Figure 1 Rotate.

[0038] The first gripping part 30 grips the outer end of the first diaphragm 2 that protrudes to the outside of the electrode body receiving part 20, namely the first outer end 2e (see reference). Figure 3 The negative electrode 3 is attached to the first separator 2. The length of the negative electrode 3 in the longitudinal direction is shorter than that of the first separator 2. Therefore, the laminated sheet of the first separator 2 and the negative electrode 3 (hereinafter also referred to as the negative electrode laminate 3S, see reference) Figure 3 The winding end portion of the electrode body 1 is composed only of the first diaphragm 2. The first gripping portion 30 grips and moves the first outer end portion 2e of the first diaphragm 2 during the initial unwinding stage of the electrode body 1, thus mounting the first diaphragm 2 onto the first transport portion 40. In this embodiment, the first gripping portion 30 is positioned to the left of the electrode body receiving portion 20.

[0039] The first transport section 40 holds the first diaphragm 2 by a pair of first clamping rollers 41 and transports the first diaphragm 2 by rotating the pair of first clamping rollers 41. The first transport section 40 is located further to the left of the first gripping section 30. The first separation device 50 separates the first diaphragm 2 and the negative electrode 3 at a position upstream of the first transport section 40 (on the electrode housing section 20 side) in the transport path R1 of the first diaphragm 2. Therefore, the first transport section 40 only transports the first diaphragm 2 by the pair of first clamping rollers 41. The first diaphragm 2 is transported by the first transport section 40 to the first diaphragm recovery section 60. The negative electrode 3, after being separated from the first diaphragm 2, moves forward along with the first diaphragm 2 and is recovered to the negative electrode recovery section 70 located in front of the first separation device 50.

[0040] The second gripping part 130 grips the outer end of the second diaphragm 4 that protrudes to the outside of the electrode body receiving part 20, namely the second outer end 4e (see reference). Figure 3 The positive electrode 5 is attached to the second separator 4. The length of the positive electrode 5 in the longitudinal direction is shorter than that of the second separator 4. Therefore, the laminated sheet of the second separator 4 and the positive electrode 5 (hereinafter also referred to as the positive electrode laminate 5S, see reference) Figure 3 The winding end portion of the electrode body 1 is composed only of the second diaphragm 4. The second gripping portion 130 grips and moves the second outer end portion 4e of the second diaphragm 4 during the initial stage of unwinding the electrode body 1, thus mounting the second diaphragm 4 onto the second transport portion 140. In this embodiment, the second gripping portion 130 is located to the right of the electrode body receiving portion 20.

[0041] The second transport section 140 holds the second diaphragm 4 by a pair of second clamping rollers 141 and transports the second diaphragm 4 by rotating the pair of second clamping rollers 141. The second transport section 140 is located further to the right of the second gripping section 130. The second separation device 150 separates the second diaphragm 4 and the positive electrode plate 5 upstream of the second transport section 140 (on the electrode housing section 20 side) in the transport path R2 of the second diaphragm 4. Therefore, the second transport section 140 transports only the second diaphragm 4 by the pair of second clamping rollers 141. The second diaphragm 4 is transported by the second transport section 140 to the second diaphragm recovery section 160. The positive electrode plate 5, after being separated from the second diaphragm 4, falls into the positive electrode plate recovery section 170 located below the second separation device 150.

[0042] The positive and negative electrode separation device 80 assists in separating the negative electrode laminate 3S and the positive electrode laminate 5S when the first holding part 30 pulls the negative electrode laminate 3S and the second holding part 130 pulls the positive electrode laminate 5S. The positive and negative electrode separation device 80 assists in separating the electrode body 1 into the negative electrode laminate 3S and the positive electrode laminate 5S by inserting a central scraper 81 between the negative electrode laminate 3S and the positive electrode laminate 5S. The positive and negative electrode separation device 80 is provided above the electrode body receiving part 20.

[0043] [Electrode housing section]

[0044] Figure 3 This is a perspective view of the electrode housing 20. (See diagram below.) Figure 3 As shown, the electrode housing 20 includes a retaining clamp 21 and a rotating box 22 (see also...). Figure 4 as well as Figure 5 ), clamp lowering device 23 (refer to) Figure 2 ) and electrode support device 24 (refer to Figure 5 ).

[0045] The retaining clamp 21 holds the electrode body 1 before the first outer end portion 2e is pulled by the first gripping part 30 and the second outer end portion 4e is pulled by the second gripping part 130. The retaining clamp 21 is a clamp with a side opening that can accommodate the electrode body 1. In this embodiment, the upper surface of the retaining clamp 21 is open. The retaining clamp 21 includes a retaining part 21a, a first mounting part 21b, and a second mounting part 21c.

[0046] The holding part 21a is a frame that can accommodate the electrode body 1. The holding part 21a is an example of the frame of the present invention. Figure 4 This is a top view of the electrode housing 20. (See attached image.) Figure 4 As shown, the upper surface of the retaining portion 21a is open. In this embodiment, the length of the retaining portion 21a in the left-right direction is shorter than its length in the front-back direction. The retaining portion 21a allows the winding shaft W (see reference) to be positioned so that... Figure 1 The electrode body 1 is held in a manner that is generally oriented in the front-back direction. That is, the width direction of the electrode body 1 housed in the holding portion 21a is generally aligned with the front-back direction of the holding portion 21a. In this embodiment, the electrode body 1 is housed in the holding portion 21a such that the winding direction of the electrode body 1 is clockwise when viewed from the front (see reference 21a). Figure 3 ). Figure 5 This is a three-dimensional view of the area surrounding the electrode housing 20. (See image below.) Figure 5As shown, the retaining part 21a has a right side surface 21R, a first left side surface 21L1, and a second left side surface 21L2. The right side surface 21R is a side surface extending in the front-rear direction and upward. The first left side surface 21L1 and the second left side surface 21L2 are sides located to the left of the right side surface 21R and extending in the front-rear direction and upward. The first left side surface 21L1 is formed on the rear end side of the retaining part 21a. The second left side surface 21L2 is formed on the front end side of the retaining part 21a. The combined length of the front-rear length of the first left side surface 21L1 and the second left side surface 21L2 is shorter than the front-rear length of the right side surface 21R. Therefore, the periphery 21aa of the opening of the retaining part 21a has a roughly C-shape when viewed from above. The front-rear length of the first left side surface 21L1 is approximately the same as the front-rear length of the first mounting part 21b. The length of the second left side 21L2 in the front-back direction is approximately the same as the length of the second mounting portion 21c in the front-back direction. When the electrode body 1 (refer to...) Figure 1 When the electrode body 1 is housed in the holding part 21a, it is held between the first left side surface 21L1 and the second left side surface 21L2 in a state that exposes to the outside of the holding clamp 21. In this embodiment, the electrode body 1 is held in such a way that the winding orientation of the electrode body 1 is clockwise when viewed from the main view.

[0047] like Figure 4 As shown, the first mounting section 21b is for mounting the first diaphragm sheet 2 (negative electrode laminate 3S (reference)). Figure 3 The first outer end portion 2e of the electrode body 1 housed in the holding portion 21a. The first mounting portion 21b extends from the periphery portion 21aa of the opening of the holding portion 21a toward the outside of the holding portion 21a at both ends in the width direction of the electrode body 1 housed in the holding portion 21a. In this embodiment, as Figure 5 As shown, the first mounting portion 21b extends to the left from the upper ends of both the first left side surface 21L1 and the second left side surface 21L2. Furthermore, to prevent the first diaphragm 2 mounted on the first mounting portion 21b from slipping off, an anti-slip mechanism such as a strap may be provided to the first mounting portion 21b. Additionally, the first mounting portion 21b may not only be located at the front and rear ends of the peripheral portion 21aa, but may also be located between the front and rear ends of the peripheral portion 21aa.

[0048] like Figure 4 As shown, the second mounting section 21c is for mounting the second separator sheet 4 (positive electrode laminate 5S (reference)). Figure 3The second outer end portion 4e of the first mounting portion 21b is located at both ends of the electrode body 1 housed in the holding portion 21a in the width direction, extending outward from the periphery portion 21aa of the opening of the holding portion 21a, opposite to the opening of the first mounting portion 21b. In this embodiment, as... Figure 5 As shown, the second mounting portion 21c extends to the right from the upper end of the right side surface 21R. The second mounting portion 21c extends from both the front and rear ends of the right side surface 21R. Similar to the first mounting portion 21b, to prevent the second diaphragm sheet 4 from falling off the second mounting portion 21c, the second mounting portion 21c may be provided with an anti-slip function such as a strap. Furthermore, the second mounting portion 21c may not only be provided on the front and rear ends of the right side surface 21R, but also between the front and rear ends of the right side surface 21R.

[0049] like Figure 3 As shown, the rotating box 22 is a box-shaped component that houses the electrode body 1 protruding from the retaining clamp 21. The top of the rotating box 22 is open. The retaining clamp 21 is positioned at a predetermined location on the rotating box 22. The positioning member 23a, which determines the position of the retaining clamp 21, will be explained when describing the clamp lowering device 23. By determining the position of the retaining clamp 21, the positions of the first outer end 2e of the first diaphragm sheet 2 (negative electrode laminate 3S) and the second outer end 4e of the second diaphragm sheet 4 (positive electrode laminate 5S) are determined. The electrode body 1, protruding from the retaining clamp 21, along with the unwinding of the first diaphragm sheet 2, the negative electrode sheet 3, the second diaphragm sheet 4, and the positive electrode sheet 5, moves approximately around the winding axis W (see reference) inside the rotating box 22. Figure 1 Rotation. The length of the rotating box 22 in the left-right direction is longer than the rotation diameter of the electrode body 1, so as to allow the electrode body 1 to move in the left-right direction.

[0050] like Figure 4As shown, a through hole 22h extending vertically is formed on the bottom surface 22D of the rotating box 22. The through hole 22h has a roughly H-shaped form when viewed from above. The through hole 22h is slightly larger than the holding clamp 21 when viewed from above. Therefore, the holding clamp 21 can move downwards and upwards from the bottom surface 22D through the through hole 22h. The through hole 22h has a first through hole 22h1, a second through hole 22h2, and a third through hole 22h3. The second through hole 22h2 is positioned in front of the first through hole 22h1. The third through hole 22h3 is positioned in front of the second through hole 22h2. The first through hole 22h1 is connected to the second through hole 22h2. The second through hole 22h2 is connected to the third through hole 22h3. The length of the second through hole 22h2 in the left-right direction is slightly longer than the length of the holding part 21a in the left-right direction, and shorter than the length of the electrode body 1 housed in the holding part 21a in the vertical direction. In addition, the length of the second through hole 22h2 in the front-back direction is shorter than the length of the electrode body 1 housed in the front-back direction.

[0051] Figure 3 The clamp lowering device 23 shown is used to hold the clamp 21 in the receiving position P1 and the departing position P2 (see reference). Figure 7 The device for moving between the electrode body 1 and the retaining part 21a. The clamp lowering device 23 is an example of the clamp moving device of the present invention. The receiving position P1 is the position where the electrode body 1 is received in the retaining part 21a. In this embodiment, the receiving position P1 is the position of the retaining clamp 21 when the bottom surface of the retaining part 21a and the bottom surface 22D of the rotating box 22 are approximately the same. The leaving position P2 is the position where the retaining part 21a leaves the electrode body 1. In this embodiment, the leaving position P2 is the position below the rotating box 22. With the retaining clamp 21 in the receiving position P1, the first outer end 2e is held by the first holding part 30 and the second outer end 4e is held by the second holding part 130, and then the retaining clamp 21 is lowered to a position lower than the rotating box 22 (see reference 130). Figure 7 ,exist Figure 7 In the middle, the retaining clamp 21 is lowered. Thus, the retaining clamp 21 moves from the receiving position P1 to the departing position P2. The clamp lowering device 23 includes: a positioning member 23a that supports the retaining clamp 21 and determines the setting position of the retaining clamp 21; and a cylinder 23b that supports the positioning member 23a and extends and retracts in the vertical direction (see reference). Figure 2 However, the configuration of the clamp lowering device 23 is not particularly limited.

[0052] like Figure 5 As shown, the electrode support device 24 is positioned diagonally below the left side of the rotating box 22. The electrode support device 24 is the electrode body 1 (refer to...) Figure 4The electrode support device 24 is a device that supports the electrode body 1 together with the rotating box 22 after protruding from the retaining clamp 21. The electrode body support device 24 includes a support member 24a and a cylinder 24b.

[0053] The support member 24a, when viewed from above, has a shape approximately the same as the through hole 22h. The support member 24a, when viewed from above, has a shape slightly smaller than the through hole 22h. The support member 24a includes a first support member 24aa, a second support member 24ab, and a third support member 24ac. The first support member 24aa, the second support member 24ab, and the third support member 24ac are arranged in a front-rear direction. The second support member 24ab is located forward of the first support member 24aa. The third support member 24ac is located forward of the second support member 24ab. The first support member 24aa has a rearward protruding shape. The second support member 24ab has a shape extending in the front-rear direction. The third support member 24ac has a forward protruding shape.

[0054] Cylinder 24b is a working cylinder that extends and retracts diagonally upward to the right and diagonally downward to the left, and moves the support member 24a closer to or away from the rotating box 22. Figure 6 This is a partial cross-sectional view of the periphery of the electrode housing 20 when the cylinder 24b extends. If the cylinder 24b extends diagonally upward to the right, the support member 24a moves diagonally upward to the right. Therefore, the support member 24a is positioned inside the through hole 22h (see reference). Figure 4 At this point, the upper surface of the support member 24a and the bottom surface 22D of the rotating box 22 are approximately flush. If the cylinder 24b retracts diagonally downwards to the left, the support member 24a moves away from the rotating box 22. After the clamp 21 has moved downwards toward the rotating box 22, and before the electrode body 1 is unwound, the cylinder 24b moves the support member 24a so that the upper surface of the support member 24a is approximately flush with the bottom surface 22D of the rotating box 22. Furthermore, the direction of extension and retraction of the cylinder 24b is not limited to this. Additionally, the actuator that moves the support member 24a is not limited to a cylinder.

[0055] [Positive and negative electrode separation device]

[0056] like Figure 3 As shown, the positive and negative electrode separation device 80 includes a central scraper 81 and a scraper lifting device 82. The central scraper 81 is an example of a guide of the present invention. The central scraper 81 guides the negative electrode sheet 3 (see reference 3). Figure 6The component is a central scraper 81 that guides the negative electrode 3 toward the first diaphragm 2 (i.e., to the left). When the first outer end portion 2e and the second outer end portion 4e are withdrawn and the outer end portion 3e of the negative electrode 3 is exposed between the first diaphragm 2 and the second diaphragm 4, the central scraper 81 is positioned between the first diaphragm 2 and the second diaphragm 4. The outer end portion 3e is the negative electrode outer end portion of the present invention. The central scraper 81 is a plate-shaped component extending in both the front-back and vertical directions. The scraper lifting device 82 is configured to lower the central scraper 81 such that its lower end portion is positioned between the first outer end portion 2e and the second outer end portion 4e, and to raise the central scraper 81 such that its lower end portion disengages from between the first outer end portion 2e and the second outer end portion 4e. Figure 2 As shown, the scraper lifting device 82 here includes a cylinder 82a that extends and retracts in the vertical direction. Figure 3 The diagram shows the descending state of the central scraper 81. (See diagram for reference.) Figure 3 As shown, the central scraper 81 is lowered by the scraper lifting device 82 and inserted between the first outer end 2e and the second outer end 4e before the electrode body 1 is unwound. When the scraper lifting device 82 raises the central scraper 81, the central scraper 81 is located above the rotating box 22. However, the position of the central scraper 81 when it moves from the position between the first outer end 2e and the second outer end 4e is not limited to this.

[0057] like Figure 3 As shown, in this embodiment, the electrode body 1 is wound clockwise when viewed from the main viewpoint, therefore, the outer end 3e of the negative electrode 3 (refer to...) Figure 1 ) and positive electrode 5 (refer to Figure 1 The outer end 5e of the negative electrode 3 is located to the right of the center in the left-right direction of the retaining clamp 21. Therefore, the central scraper 81 is located to the right of the center in the left-right direction of the retaining clamp 21. When the central scraper 81 descends, it can prevent the outer end 3e of the negative electrode 3 from being located to the right of the central scraper 81.

[0058] [First Control Section]

[0059] like Figure 3As shown, the first gripping portion 30 includes a pair of first grippers 31 and a first moving device 32. The first gripping portion 30 is the part that grips the first outer end portion 2e of the first diaphragm sheet 2. The pair of first grippers 31 grip the first outer end portion 2e of the first diaphragm sheet 2 (negative electrode laminate 3S). The pair of first grippers 31 includes: a front side gripper 31F; and a rear side gripper 31Rr disposed behind the front side gripper 31F. The front side gripper 31F grips the front side of the first outer end portion 2e. The rear side gripper 31Rr grips the rear side of the first outer end portion 2e. The first grippers 31 are disposed between two first mounting portions 21b arranged in the front-rear direction. Therefore, the first grippers 31 (first gripping portion 30) grip the middle portion of the first outer end portion 2e in the width direction (here, the front-rear direction). In addition, the number of first grippers 31 is not particularly limited.

[0060] The first moving device 32 moves the first holding part 30 so that the first diaphragm 2 is guided into the first clamping roller 41 (see reference). Figure 1 The device. In this embodiment, the first moving device 32 moves along a predetermined transport path R1 of the first diaphragm 2 (refer to...). Figure 2 The first moving device 32 moves the pair of first grippers 31. Here, "moving along the conveying path R1 of the first diaphragm 2" is not limited to moving along a path consistent with the conveying path R1 of the first diaphragm 2, but broadly refers to moving in a manner that passes through a predetermined side (here, between the pair of gripping rollers 41, above the bending roller 51) of the components arranged on the conveying path R1 (e.g., the pair of gripping rollers 41 of the first conveying unit 40, the bending roller 51 of the first separating device 50 described later). Here, the path by which the first moving device 32 moves the pair of first grippers 31 is along the conveying path R1 until it passes at least between the pair of gripping rollers 41. Details of the path by which the first moving device 32 moves the pair of first grippers 31 will be described later. The first gripping unit 30 holds the first diaphragm 2 by the pair of first grippers 31, and the first moving device 32 moves the pair of first grippers 31, thereby pulling the first diaphragm 2.

[0061] like Figure 3 As shown, the first moving device 32 includes: a support portion 32a that supports a pair of first grippers 31; an upper and lower guide rail 32b that supports the support portion 32a so that it can move in the vertical direction; and a left and right guide rail 32c that supports the upper and lower guide rail 32b so that it can move in the left and right direction (see reference). Figure 2 ); The vertical movement motor 32d causes the support 32a to move along the vertical guide rail 32b (see reference). Figure 2); and a left-right moving motor 32e, which causes the upper and lower guide rails 32b to move along the left-right guide rails 32c (see reference). Figure 2 ).

[0062] like Figure 3 As shown, the support portion 32a extends in the front-rear direction. The support portion 32a includes a rotating device 32a1 that rotates a pair of first grippers 31 in the vertical direction. The rotating device 32a1 includes a rotating motor 32a2, which has a rotating shaft that rotates about an axis A1, which is offset relative to the base ends (in this case, the left ends) of each pair of first grippers 31 when viewed in the front-rear direction. The axis A1 of the rotating shaft of the rotating motor 32a2 extends in the front-rear direction. The pair of first grippers 31 rotate about the axis A1. The posture of the pair of first grippers 31 can be changed by the rotating device 32a1.

[0063] like Figure 2 As shown, the vertical guide rail 32b extends in the vertical direction. When the vertical movement motor 32d is driven, the support part 32a and the pair of first grippers 31 supported thereon are positioned in the vertical direction along the vertical guide rail 32b. The horizontal guide rail 32c extends in the horizontal direction. When the horizontal movement motor 32e is driven, the vertical guide rail 32b, the support part 32a, and the pair of first grippers 31 are positioned in the horizontal direction along the horizontal guide rail 32c. By combining the driving of the vertical movement motor 32d and the driving of the horizontal movement motor 32e, the pair of first grippers 31 can be moved along a predetermined path when viewed in the front-back direction.

[0064] [First Transport Department]

[0065] like Figure 2 As shown, the first conveying unit 40 includes a pair of clamping rollers 41 that clamp and rotate the first diaphragm 2. The first clamping roller 41 is a member that clamps and pulls out the first diaphragm 2. The pair of clamping rollers 41 includes a driving roller 41L and a driven roller 41R disposed to the right of the driving roller 41L and facing the driving roller 41L. The driving roller 41L and the driven roller 41R are each configured to rotate about a rotation axis extending in the front-rear direction. The first transport unit 40 includes: a transport motor 42 that rotates the driving roller 41L; and a clamping working cylinder 43 (see reference) that moves the driven roller 41R in the left-right direction to approach or move away from the driving roller 41L. Figure 7 The clamping cylinder 43 is a pneumatic cylinder that extends and retracts in the left-right direction. However, the actuator that moves the driven roller 41R in the left-right direction is not limited to a pneumatic cylinder; for example, it could also be a motor.

[0066] The first transport unit 40 drives the clamping cylinder 43 when the first diaphragm 2 is positioned between the drive roller 41L and the driven roller 41R, clamping the first diaphragm 2 between the drive roller 41L and the driven roller 41R. If the transport motor 42 is driven, the drive roller 41L rotates downwards on the side opposite to the driven roller 41R, transporting the first diaphragm 2 downwards together with the driven roller 41R. By being transported by the first transport unit 40, the first diaphragm 2 moves along a predetermined transport path R1. A first diaphragm recovery unit 60 is provided below the drive roller 41L and the driven roller 41R.

[0067] [Separation Device 1]

[0068] The first separation device 50 is located upstream of the first transport section 40 in the transport path R1 of the first diaphragm 2, separating the first diaphragm 2 and the negative electrode 3 (see reference). Figure 1 ). Figure 7 This is a perspective view of the first separation device 50. (See diagram below.) Figure 7 As shown, the first separation device 50 includes a bending roller 51, a scraper 52, and a scraper insertion device 53.

[0069] A bending roller 51 is disposed on the transport path R1 of the first diaphragm 2, causing the transport path R1 to bend. The bending roller 51 extends in the front-to-back direction. The bending roller 51 is configured to rotate about a rotation axis extending in the front-to-back direction. In this embodiment, the bending roller 51 is disposed to the left and above the rotating box 22 of the electrode housing 20. The first diaphragm 2 is wound around the bending roller 51 from above by the first holding part 30. Between the electrode housing 20 and the bending roller 51, the first diaphragm 2 is transported diagonally upward and to the left.

[0070] A bending roller 51 is positioned above the pair of first clamping rollers 41 of the first transport section 40. The bending roller 51 bends the transport path R1 of the first diaphragm 2 toward the pair of first clamping rollers 41 (in this case, downwards). However, the direction in which the bending roller 51 bends the transport path R1 of the first diaphragm 2 is not particularly limited. For example, the direction in which the bending roller 51 bends the transport path R1 of the first diaphragm 2 could be upwards. The angle in which the bending roller 51 bends the transport path R1 is not particularly limited.

[0071] The scraper 52 is a component that separates the first diaphragm 2 and the negative electrode 3. The scraper 52 is configured as a plate extending in both the front-back and left-right directions, and has an upper surface 52U and a lower surface 52D. The scraper 52 separates the first diaphragm 2 and the negative electrode 3 on the upper surface 52U side and the lower surface 52D side. The end portion 52R of the scraper 52, in frontal view, is formed as a cone, with its vertical height decreasing towards the upstream side of the transport path R1 of the first diaphragm 2. In this embodiment, the upper surface 52U of the scraper 52 is bent to form the cone shape of the end portion 52R. Here, the lower surface 52D of the scraper 52 is flat. The width of the scraper 52 in the front-back direction is longer than the width of the negative electrode 3.

[0072] The scraper insertion device 53 inserts the scraper 52 into the curved portion R1a of the transport path R1, or causes the scraper 52 to retract from the curved portion R1a. Figure 8 This is a perspective view of the first separation device 50 with the scraper 52 inserted into the curved portion R1a of the transport path R1. (See image below.) Figure 8 As shown, the scraper 52 is positioned at its right end at the curved portion R1a of the transport path R1 of the first diaphragm 2. The scraper insertion device 53 is located at the first outer end 2e of the first diaphragm 2 (see reference). Figure 1 After passing through the bending section R1a and before the outer end 3e of the negative electrode 3 reaches the bending section R1a, the scraper 52 is inserted into the transport path R1. By inserting the scraper 52 into the transport path R1 at this time, the first diaphragm 2 can be wound onto the bending roller 51, and, by the subsequent movement of the first diaphragm 2, the end portion 52R of the scraper 52 enters between the first diaphragm 2 and the negative electrode 3. If the negative electrode 3 is peeled off from the first diaphragm 2 by the scraper 52, the negative electrode 3 located above the first diaphragm 2 rests on the upper surface 52U of the scraper 52. The first diaphragm 2 located below the negative electrode 3 is transported on the lower surface 52D side of the scraper 52.

[0073] like Figure 8 As shown, the scraper insertion device 53 includes a pair of guide rods 53a at the front and rear and an insertion working cylinder 53b. By driving the insertion working cylinder 53b, the scraper 52 approaches or moves away from the bending roller 51 along the guide rods 53a. In this embodiment, the scraper insertion device 53 supports the scraper 52 at an angle such that the end portion 52R of the scraper 52 is located above the base end portion 52L. The scraper 52 is tilted upward to the right. The scraper insertion device 53 moves the scraper 52 obliquely upward to the right, bringing it closer to the bending roller 51. If the scraper insertion device 53 is driven towards the side where the scraper 52 approaches, the scraper 52 abuts against the surface of the first diaphragm 2 wound on the bending roller 51 (abutting against the bending roller 51 via the first diaphragm 2).

[0074] like Figure 2As shown, the negative electrode recycling section 70 includes: a guide plate 71 disposed below the scraper 52 and extending to the left of the scraper 52; and a negative electrode recycling box 72 disposed below the left end of the guide plate 71. The negative electrode is separated from the first separation device 50 and rests on the upper surface 52U of the scraper 52 (see reference). Figure 8 The negative electrode 3, along with the first diaphragm 2, is moved onto the guide plate 71 by the first transport unit 40. The guide plate 71 tilts downwards to the left. After passing through the guide plate 71, the negative electrode 3 is housed in... Figure 2 The negative electrode recycling box 72 shown.

[0075] [Second Control Section]

[0076] Figure 3 The second gripping portion 130 shown is the part that grips the second outer end portion 4e of the second diaphragm sheet 4. The second gripping portion 130 is configured similarly to the first gripping portion 30 that grips the first diaphragm sheet 2. The second gripping portion 130 includes a pair of second grippers 131 and a second moving device 132. The pair of second grippers 131 grip the second outer end portion 4e of the second diaphragm sheet 4 (positive electrode laminate 5S). The pair of second grippers 131 includes a front side gripper 131F and a rear side gripper 131Rr disposed behind the front side gripper 131F. The front side gripper 131F grips the front side of the second outer end portion 4e. The rear side gripper 131Rr grips the rear side of the second outer end portion 4e. The second grippers 131 are disposed between two second mounting portions 21c arranged in the front-rear direction. Therefore, the second gripper 131 (the second holding part 130) holds the middle part of the second outer end 4e in the width direction (here, the front-to-back direction). In addition, the number of the second gripper 131 is not particularly limited.

[0077] The second moving device 132 moves the second gripping part 130 so that the second diaphragm 4 is guided into the second clamping roller 141 (see reference). Figure 1 The device. In this embodiment, the second moving device 132 causes a pair of second grippers 131 to move along a predetermined transport path R2 of the second diaphragm 4 (see reference). Figure 2 The phrase "along transport path R2" refers to the transport path R1 of the first diaphragm 2 (see reference). Figure 2 The situation is the same. The second moving device 132 includes: a support portion 132a, which has a rotating device 132a1 for rotating a pair of second grippers 131; an upper and lower guide rail 132b that supports the support portion 132a so that it can move in the vertical direction; and a left and right guide rail 132c that supports the upper and lower guide rail 132b so that it can move in the left and right direction (see reference). Figure 2); The vertical movement motor 132d causes the support 132a to move along the vertical guide rail 132b (see reference). Figure 2 ); and a left-right moving motor 132e, which causes the upper and lower guide rails 132b to move along the left-right guide rails 132c (see reference). Figure 2 The rotating device 132a1 includes a rotating motor 132a2, which has a rotating shaft that rotates about an axis A2, which is offset relative to the base ends (in this case, the right ends) of the pair of second grippers 131 when viewed in the front-rear direction. The rotation device 132a1 allows the orientation of the pair of second grippers 131 to be changed. The second gripping part 130 holds the second diaphragm 4 by the pair of second grippers 131, and the second moving device 132 moves the pair of second grippers 131, thereby pulling the second diaphragm 4.

[0078] [Second Transport Department]

[0079] like Figure 2 As shown, the second transport section 140 for transporting the second diaphragm 4 is configured similarly to the first transport section 40 for transporting the first diaphragm 2. The second transport section 140 includes a pair of second clamping rollers 141 that clamp and rotate the second diaphragm 4. The second clamping rollers 141 are components that clamp and extract the second diaphragm 4. The pair of second clamping rollers 141 includes a drive roller 141L and a driven roller 141R arranged to the right of the drive roller 141L and facing it. The second transport section 140 includes a transport motor 142 that rotates the drive roller 141L (see reference). Figure 13 ); and a clamping cylinder 143 that moves the driven roller 141R in the left-right direction and approaches or moves away from the driving roller 141L. A bending roller 145 is provided above the driving roller 141L and the driven roller 141R. The bending roller 145 bends the transport path R2 of the second diaphragm 4, which is generally horizontal up to this point, in a generally vertical direction, so that it faces the side of the driving roller 141L and the driven roller 141R.

[0080] The second transport unit 140 drives the clamping cylinder 143 when the second diaphragm 4 is positioned between the driving roller 141L and the driven roller 141R, thereby clamping the second diaphragm 4 using the driving roller 141L and the driven roller 141R (see reference). Figure 13 When the conveying motor 142 is driven, the drive roller 141L rotates downward in the direction opposite to the driven roller 141R, and together with the driven roller 141R, conveys the second diaphragm sheet 4 downward. A second diaphragm recovery section 160 is provided below the drive roller 141L and the driven roller 141R.

[0081] [Second Separation Device]

[0082] The second separation device 150 separates the second diaphragm 4 and the positive electrode 5 at a position upstream of the second transport section 140 in the transport path R2 of the second diaphragm 4. Figure 9 This is a perspective view of the second separation device 150. Additionally, Figure 9 This diagram shows the state during the winding of the second diaphragm sheet 4 around the second separation device 150. (See diagram below.) Figure 9 As shown, the second separation device 150 includes an upstream roller 151, a downstream roller 152, a stripping roller 153, and a roller lowering device 154.

[0083] An upstream roller 151 is disposed on the transport path R2 of the second diaphragm 4 and winds the second diaphragm 4 (positive electrode laminate 5S). The upstream roller 151 extends in the front-rear direction. The upstream roller 151 is configured to rotate about a rotation axis extending in the front-rear direction. In this embodiment, the upstream roller 151 is disposed to the right and above the rotation box 22 of the electrode housing 20. The second diaphragm 4 (positive electrode laminate 5S) is wound onto the upstream roller 151 from above by the second holding part 130. Between the electrode housing 20 and the upstream roller 151, the second diaphragm 4 (positive electrode laminate 5S) is transported diagonally upward and to the right.

[0084] The downstream roller 152 is positioned downstream of the upstream roller 151 within the transport path R2 of the second diaphragm 4, and winds the second diaphragm 4. Here, the downstream roller 152 is positioned to the right and above the upstream roller 151. The downstream roller 152 extends in the front-rear direction. The downstream roller 152 is configured to rotate about a rotation axis extending in the front-rear direction. The second diaphragm 4 is wound from above onto the upstream roller 151 by the second holding portion 130. The downstream roller 152 is positioned at approximately the same height as the bending roller 145 of the second transport portion 140. The second diaphragm 4 is transported approximately horizontally between the downstream roller 152 and the bending roller 145.

[0085] A stripping roller 153 is disposed in the left-right direction between the upstream roller 151 and the downstream roller 152. The stripping roller 153 is positioned on the transport path R2 of the second diaphragm 4 and is a roller that bends the transport path R2 to separate the second diaphragm 4 from the positive electrode sheet 5. The stripping roller 153 extends in the front-back direction. The stripping roller 153 rotates about a rotation axis extending in the front-back direction.

[0086] The roller lowering device 154 is configured to lower the peeling roller 153, moving it to a position below the line L1 connecting the upstream roller 151 and the downstream roller 152. Here, the roller lowering device 154 moves the peeling roller 153 downwards, causing it to collide with the second diaphragm 4. Alternatively, the roller lowering device 154 is also configured to raise the peeling roller 153, moving it to a position above the line L1 connecting the upstream roller 151 and the downstream roller 152. Figure 2As shown, the roller lowering device 154 includes a cylinder 154a that extends and retracts in the vertical direction. However, the configuration of the roller lowering device 154 is not limited to this. For example, the roller lowering device 154 may also include a motor for raising and lowering the stripping roller 153.

[0087] Figure 10 This is a perspective view of the second separation device 150 after the stripping roller 153 has descended. Figure 10 As shown, if the positive electrode laminate 5S is wound on the upstream roller 151 and downstream roller 152, the drive roller lowering device 154 lowers the stripping roller 153 to a position below line L1, and the stripping roller 153 bends the conveying path R2 into a V-shape. By bending the conveying path R2 into a V-shape, the positive electrode 5 separates from the second diaphragm 4. A positive electrode recovery section 170 for recovering the positive electrode 5 is provided below the stripping roller 153. The angle at which the stripping roller 153 bends the conveying path R2 is not particularly limited.

[0088] Alternatively, the upstream roller 151 and the downstream roller 152 can be arranged in a direction other than left-right, such as up-down. The direction of movement of the stripping roller 153 is not particularly limited as long as it intersects the line connecting the upstream roller 151 and the downstream roller 152.

[0089] [Control device]

[0090] Figure 2 The control device 100 shown includes the cylinder 23b of the clamp lowering device 23 and the cylinder 24b of the electrode support device 24 (see reference). Figure 5 ), the pair of first grippers 31 of the first gripping part 30, and the rotating motor 32a2 (see reference) Figure 3 ), vertical moving motor 32d and horizontal moving motor 32e, moving motor 42 of the first conveying unit 40 and clamping working cylinder 43 (see reference) Figure 7 ), the insertion working cylinder 53b of the scraper insertion device 53 (refer to) Figure 7 ), the pair of second grippers 131 of the second gripping part 130, and the rotating motor 132a2 (see reference) Figure 3 The control device 100 connects to the vertical moving motor 132d and the horizontal moving motor 132e, the conveying motor 142 and the clamping cylinder 143 of the second conveying unit 140, the cylinder 154a of the roller lowering device 154, and the cylinder 82a of the scraper lowering device 82, and controls their operation. Furthermore, the control device 100 controls each part to perform the actions described later during the decomposition of the electrode body 1.

[0091] The configuration of the control device 100 is not particularly limited. For example, the control device 100 may include a microcomputer. The microcomputer may include, for example, an interface (I / F) for receiving data from external devices, a central processing unit (CPU) for executing program commands, a ROM (read-only memory) storing the program executed by the CPU, RAM (random access memory) used as a working area for program execution, and a memory storing the aforementioned program or various data. The control device 100 may also include, for example, a programmable controller.

[0092] [Decomposition process of the electrode]

[0093] Hereinafter, an example of the process by which the electrode body 1 is decomposed by the electrode body decomposition apparatus 10 according to this embodiment will be described. Figure 11 This is a flowchart illustrating the process of decomposing electrode 1.

[0094] [Separation of negative and positive electrodes]

[0095] Figure 11 The electrode preparation process S10 shown is for preparing electrode 1 (refer to...) Figure 1 In the process of preparing the electrode body 1, a strip-shaped negative electrode 3 and a strip-shaped positive electrode 5 are laminated on the electrode body 1 through a strip-shaped first diaphragm 2 and a strip-shaped second diaphragm 4, and wound in a specified winding direction. The retaining fixture preparation process S11 is to prepare the retaining fixture 21 (refer to...). Figure 3 In the process of separating the electrode body 1 into a first diaphragm sheet 2 and a negative electrode sheet 3, and a second diaphragm sheet 4 and a positive electrode sheet 5, the holding clamp 21 has a holding portion 21a capable of accommodating the electrode body 1. The separation preparation process S20 is a process of preparing to separate the electrode body 1 into a first diaphragm sheet 2 and a negative electrode sheet 3, and a second diaphragm sheet 4 and a positive electrode sheet 5. Figure 11 As shown, the separation preparation process S20 includes an external end processing process S21, an electrode body receiving process S22, a holding process S23, and a scraper lowering process S24.

[0096] The outer end processing step S21 is the following step: at the end of the winding of the electrode body 1, the electrode body 1 is separated into a first diaphragm sheet 2 and a negative electrode sheet 3, and a second diaphragm sheet 4 and a positive electrode sheet 5. The outer end processing step S21 varies depending on the outer end processing of the electrode body 1. For example, the tape (not shown) attached to the outer end is peeled off, the first outer end 2e of the first diaphragm sheet 2 is bent to the left, and the second outer end 4e of the second diaphragm sheet 4 is bent to the right.

[0097] The electrode housing process S22 is the following process: the electrode body 1, after undergoing the outer end processing process S21, is housed in the holding fixture 21. In the electrode housing process S22, the two ends (here, the front end and the rear end) of the first outer end 2e of the first diaphragm 2 are placed on the first placement portion 21b of the holding fixture 21 (see reference). Figure 3 Additionally, in the electrode housing process S22, the two ends (here, the front end and the rear end) of the second outer end portion 4e of the second diaphragm 4 in the width direction are placed on the second placement portion 21c of the holding clamp 21 (see reference). Figure 3 The external end processing step S21 and the electrode body receiving step S22 can also be performed manually. However, the external end processing step S21 and the electrode body receiving step S22 can also be performed automatically or semi-automatically. The external end processing step S21 can also be performed while the electrode body 1 is housed in the holding clamp 21.

[0098] The holding process S23 is as follows: the first outer end 2e of the first diaphragm 2 is held by a pair of first jaws 31 of the first holding part 30, and the second outer end 4e of the second diaphragm 4 is held by a pair of second jaws 131 of the second holding part 130 (see reference). Figure 3 A pair of first grippers 31 grip the middle portion of the first outer end portion 2e, which is placed on the two first mounting portions 21b, in the width direction (here, the front-to-back direction). A pair of second grippers 131 grip the middle portion of the second outer end portion 4e, which is placed on the two second mounting portions 21c, in the width direction (here, the front-to-back direction). Furthermore, in the gripping process S23, the first outer end portion 2e and the second outer end portion 4e are gripped simultaneously; however, the process of gripping the first outer end portion 2e and the process of gripping the second outer end portion 4e can also be separate processes.

[0099] The scraper lowering process S24 is as follows: When the first outer end 2e of the first diaphragm 2 and the second outer end 4e of the second diaphragm 4 are pulled out, and the outer end 3e of the negative electrode 3 is pulled out from the electrode body 1 (the pulling process S31 described later), the central scraper 81 guiding the negative electrode 3 is positioned between the first outer end 2e and the second outer end 4e in such a way that the outer end 3e of the negative electrode 3 is pulled out toward the side of the first diaphragm 2 (to the left in this case). In the scraper lowering process S24, the central scraper 81 is lowered by the scraper lifting device 82 and inserted between the negative electrode laminate 3S and the positive electrode laminate 5S (see reference). Figure 3 If the central scraper 81 descends, it is positioned between the first outer end 2e of the first diaphragm 2 and the second outer end 4e of the second diaphragm 4. Furthermore, the scraper descent process S24 can be performed before the pulling process S31, provided it can be done within the specified timeframe. Figure 11 The timing shown was executed previously.

[0100] Separation process S30 consists of the following steps: pulling the first diaphragm 2 and the second diaphragm 4, and extracting and separating the first diaphragm 2, the second diaphragm 4, the negative electrode 3, and the positive electrode 5. Separation process S30 includes pulling step S31, central scraper raising step S32, clamp lowering step S33, support member raising step S34, negative electrode separation step S35, first diaphragm clamping step S36, first diaphragm transporting step S37, positive electrode separation step S135, second diaphragm clamping step S136, and second diaphragm transporting step S137.

[0101] The pulling process S31 is as follows: the first moving device 32 pulls the first diaphragm 2 held by a pair of first grippers 31 diagonally upward to the left, and the second moving device 132 pulls the second diaphragm 4 held by a pair of second grippers 131 diagonally upward to the right (see reference). Figure 6 ).like Figure 6 As shown, when the first diaphragm 2 and the second diaphragm 4 are pulled, the pair of first grippers 31 rotate 45 degrees clockwise when viewed from the main viewpoint. At this time, the pair of first grippers 31 are positioned with their ends facing downwards to the right. Furthermore, when the first diaphragm 2 and the second diaphragm 4 are pulled, the pair of second grippers 131 rotate 45 degrees counterclockwise. At this time, the pair of second grippers 131 are positioned with their ends facing downwards to the left. If the first diaphragm 2 and the second diaphragm 4 are pulled, the outer end 3e of the negative electrode 3 protrudes between the first diaphragm 2 and the second diaphragm 4.

[0102] Figure 11 The central scraper raising process S32 shown is the following process: after the withdrawal action (pulling process S31) of the first outer end 2e and the second outer end 4e begins, the central scraper 81 is moved to a position where it is not in contact with the electrode body 1. In the central scraper raising process S32, the central scraper 81 is raised to a position above the rotating box 22 by the scraper lifting device 82.

[0103] The clamp lowering process S33 is the following process: moving the electrode body 1, which is held by the first gripping part 30 and the second gripping part 130 and housed in the holding part 21a, to the outside of the holding part 21a. In the clamp lowering process S33, the clamp lowering device 23 moves the holding clamp 21 from the housing position P1 (see reference 23). Figure 3 ) Descend to the departure position P2 (refer to) Figure 7As the cylinder 23b of the clamp lowering device 23 retracts, the positioning member 23a moves downward. This keeps the clamp 21 passing through the through hole 22h of the rotating box 22 in the vertical direction and lowering it. In this embodiment, since the winding direction of the electrode body 1 is clockwise in the main view, the portion of the electrode body 1 other than the outermost periphery held by the first gripping part 30 and the second gripping part 130 is located to the left of the outermost periphery of the electrode body 1. Therefore, if the clamp 21 is kept lowering, the electrode body 1 tilts to the left (see reference). Figure 6 As described above, the length of the second through hole 22h2 in the left-right direction is shorter than the length of the electrode body 1 in the vertical direction when housed in the holding clamp 21, and the length of the second through hole 22h2 in the front-back direction is shorter than the length of the electrode body 1 in the front-back direction when housed in the holding clamp 21 (see reference). Figure 4 Therefore, when electrode 1 is tilted to the left, electrode 1 does not fall through the through hole 22h but is placed on the bottom surface 22D of the rotating box 22. Thus, electrode 1 is removed from the holding part 21a (see reference). Figure 6 Therefore, electrode 1 can rotate freely.

[0104] The support member raising process S34 is as follows: In the clamp lowering process S33, after the holding part 21a moves to the departure position P2, the support member 24a is raised. In the support member raising process S34, the support member 24a located below the rotating box 22 is moved diagonally upward to the right by the cylinder 24b. As a result, the support member 24a is positioned inside the through hole 22h of the rotating box 22, and the upper surface of the support member 24a and the bottom surface 22D are approximately flush (see reference). Figure 6 Therefore, electrode 1 will not fall out of the through hole 22h, and electrode 1 can rotate.

[0105] [Recycling of the first diaphragm sheet and the negative electrode sheet]

[0106] The negative electrode separation process S35 comprises the following steps: winding the negative electrode laminate 3S onto a bending roller 51 to bend the transport path R1 of the first diaphragm sheet 2; inserting a plate-shaped scraper 52 into the bent portion R1a of the transport path R1; and separating the first diaphragm sheet 2 and the negative electrode sheet 3 on the lower surface 52D side and the upper surface 52U side of the scraper 52. The negative electrode separation process S35 includes a winding process S35a, a scraper insertion process S35b, and a gripper re-movement process S35c.

[0107] The winding process S35a is the following process: moving a pair of first grippers 31 above and to the left of the bending roller 51, and then moving them from there below and to the left of the bending roller 51, winding the first diaphragm 2 onto the bending roller 51 (see reference). Figure 7If the first diaphragm 2 is wound around the bending roller 51, the movement of the pair of first grippers 31 stops. At this time, the negative electrode 3 is located upstream of the bending roller 51 along the transport path R1.

[0108] The scraper insertion process S35b is as follows: After the first outer end 2e of the first diaphragm 2 passes through the curved portion R1a of the transport path R1 and before the outer end 3e of the negative electrode 3 reaches the curved portion R1a of the transport path R1, the scraper 52 is moved to the right and inserted into the curved portion R1a of the transport path R1 (see reference). Figure 8 ).

[0109] The gripper repositioning step S35c is a step in which the pair of first grippers 31 are moved downwards. As a result, the negative electrode 3 is moved to the location of the end portion 52R of the scraper 52. As the first diaphragm 2 is fed downstream of the transport path R1, the negative electrode 3 is sequentially peeled off from the first diaphragm 2 by the scraper 52. This process continues even after the device for transporting the first diaphragm 2 is changed to the first transport unit 40. Through the gripper repositioning step S35c, the end portion 52R of the scraper 52 is inserted between the first diaphragm 2 and the rolled negative electrode 3.

[0110] The first diaphragm clamping process S36 is the process of clamping the first diaphragm sheet 2 by the first clamping roller 41. A pair of first grippers 31 pass between the pair of first clamping rollers 41, moving to a position lower than the pair of first clamping rollers 41. Thus, the first diaphragm sheet 2 is guided between the pair of first clamping rollers 41. If the first diaphragm sheet 2 is guided between the pair of first clamping rollers 41, the driven roller 41R moves to the left, and the first diaphragm sheet 2 is clamped by the driving roller 41L and the driven roller 41R. If the first diaphragm sheet 2 is clamped, the gripping of the first grippers 31 is released.

[0111] The first diaphragm transport step S37 is the following step: rotating the drive roller 41L to transport the first diaphragm sheet 2 and extract it. Figure 12 This is a perspective view of the first transport section 40 and the first separation device 50 during the transport of the first diaphragm sheet 2. Figure 12 As shown, by transporting the first diaphragm 2 by the first transport unit 40, the first diaphragm 2 and the negative electrode 3 are unwound from the electrode body 1, and the first diaphragm 2 and the negative electrode 3 are separated and recovered.

[0112] In addition, although not in Figure 11 As shown, during the movement of the pair of first grippers 31, the posture of the pair of first grippers 31 is changed in a timely manner by the rotating device 32a1. Specifically, in the gripping process S23, the pair of first grippers 31 are positioned with their ends facing to the right (see reference). Figure 3As described above, in the pulling process S31, the first gripper 31 rotates with its end facing downwards and to the right. In the negative electrode separation process S35, the pair of first grippers 31 rotate counterclockwise when viewed from the main viewpoint, so that their ends face upwards (see reference). Figure 7 Thus, the first diaphragm 2 can be smoothly pulled and transported to the first transport section 40. However, the posture of the pair of first grippers 31 is not limited to the posture described above. Unless there are special problems, the pair of first grippers 31 can be supported on the support section 32a in a swinging manner or fixed to the support section 32a in a non-swinging manner.

[0113] [Recycling of the second diaphragm and the positive electrode]

[0114] In this embodiment, the separation and recovery of the second diaphragm 4 and the positive electrode 5 are carried out in parallel with the separation and recovery of the first diaphragm 2 and the negative electrode 3.

[0115] The positive electrode separation process S135 is as follows: the positive electrode laminate 5S is wound onto the stripping roller 153, the transport path R2 of the second separator 4 is bent, and the second separator 4 and the positive electrode 5 are separated. The positive electrode separation process S135 includes a gripper movement process S135a, a roller descent process S135b, and a gripper re-movement process S135c.

[0116] The gripper moving step S135a is a step in which a pair of second grippers 131 are moved. In the gripper moving step S135a, firstly, the pair of second grippers 131 are moved to the right of the downstream roller 152 (downstream of the transport path R2), and the second diaphragm 4 is introduced to a position above the upstream roller 151 and the downstream roller 152 and below the peeling roller 153 (see reference). Figure 9 Then, the pair of second grippers 131 are moved back a predetermined distance to the left (upstream side of transport path R2). As a result, the positive electrode laminate 5S relaxes and sits on the upstream roller 151 and the downstream roller 152 without tension.

[0117] The roll lowering process S135b involves lowering the stripping roll 153 to a position below the upstream roll 151 and the downstream roll 152. As a result, the positive electrode laminate 5S is wound onto the stripping roll 153. Figure 10 As shown, the transport path R2 of the second diaphragm 4 is bent into a V-shape by the stripping roller 153. The positive electrode 5 is separated from the second diaphragm 4 by the bending of the transport path R2.

[0118] The gripper repositioning process S135c involves moving the pair of second grippers 131 to the right again. Accompanying this movement of the pair of second grippers 131, the positive electrode 5 is sequentially peeled off at the bend in the transport path R2, R2a. This process is repeated after the device for transporting the second diaphragm 4 is changed to the second transport section 140.

[0119] The second diaphragm clamping process S136 is as follows: the second diaphragm 4 is clamped by the second clamping roller 141. A pair of second grippers 131 pass between the pair of second clamping rollers 141, moving to a position lower than the pair of second clamping rollers 141. Thus, the second diaphragm 4 is guided between the pair of second clamping rollers 141. If the second diaphragm 4 is guided between the pair of second clamping rollers 141, the driven roller 141R moves to the left, and the second diaphragm 4 is clamped by the driving roller 141L and the driven roller 141R. If the second diaphragm 4 is clamped, the gripping of the second grippers 131 is released.

[0120] The second diaphragm handling process S137 is the following process: rotating the drive roller 141L to handle the second diaphragm sheet 4 and extract it. Figure 13 This is a front view of the second transport section 140 and the second separation device 150 during the transport of the second diaphragm sheet 4. By transporting the second diaphragm sheet 4 by the second transport section 140, the second diaphragm sheet 4 and the positive electrode sheet 5 are unwound from the electrode body 1, and the second diaphragm sheet 4 and the positive electrode sheet 5 are separated and recovered.

[0121] Although Figure 11 Although not shown in the diagram, similar to the movement of the pair of first grippers 31, the posture of the pair of second grippers 131 is changed in a timely manner by the rotating device 132a1 during the movement of the pair of second grippers 131. Specifically, in the gripping process S23, the pair of second grippers 131 are positioned with their ends facing left (see reference). Figure 3 As described above, in the pulling process S31, the pair of second grippers 131 rotate with their ends facing downwards and to the left. In the positive electrode separation process S135, the pair of second grippers 131 rotate 90 degrees counterclockwise when viewed from the main viewpoint, so that their ends face downwards (see reference). Figure 9 In the positive electrode separation process S135, a pair of second grippers 131 rotate 180 degrees clockwise when viewed from the main viewpoint, so that their ends face upwards.

[0122] As described above, in the above embodiment, the first diaphragm 2 is introduced into the first clamping roller 41, and the second diaphragm 4 is introduced into the second clamping roller 141. By removing the first diaphragm 2 and the second diaphragm 4, the prepared electrode body 1 can be separated and recycled into at least the first diaphragm 2, the negative electrode 3, the second diaphragm 4, and the positive electrode 5. Therefore, for example, compared to recovering the electrode material by crushing and separating the electrode body 1, the recovery rate of the electrode material can be improved.

[0123] In the above embodiment, the first outer end portion 2e and the second outer end portion 4e of the electrode body 1, which are housed in the holding portion 21a of the holding clamp 21 prepared in the holding clamp preparation process S11, are grasped. Therefore, the first outer end portion 2e and the second outer end portion 4e can be grasped while the electrode body 1 is positioned. Since a specific portion of the electrode body 1 can be grasped, the electrode body 1 can be unwound more appropriately.

[0124] In the above embodiment, the first holding part 30 holds the middle portion of the first outer end portion 2e mounted on the first mounting part 21b, and the second holding part 130 holds the middle portion of the second outer end portion 4e mounted on the second mounting part 21c. Holding the middle portion of the first outer end portion 2e and the second outer end portion 4e with both ends supported in the width direction allows for more appropriate holding of the first outer end portion 2e and the second outer end portion 4e. Therefore, the electrode body 1 can be unwound more appropriately.

[0125] In the above embodiment, during the clamp lowering process S33, the clamp lowering device 23 lowers the holding clamp 21. At this time, the electrode body 1, held by the first holding part 30 and the second holding part 130, is removed from the holding part 21a. Therefore, when the first diaphragm 2 and the second diaphragm 4 are pulled, the rotation of the electrode body 1 is not hindered by the holding clamp 21, and the electrode body 1 can rotate freely. Consequently, the electrode body 1 can be unwound more appropriately.

[0126] In the above embodiment, when the first outer end portion 2e and the second outer end portion 4e are pulled out, and the outer end portion 3e of the negative electrode 3 is pulled out from the electrode body 1, the central scraper 81 is disposed between the first outer end portion 2e and the second outer end portion 4e (scraper descent process S24). With the central scraper 81 disposed, even if the outer end portion 3e of the negative electrode 3 moves to the right due to the rigidity of the negative electrode 3, the outer end portion 3e of the negative electrode 3 will still abut against the central scraper 81. Therefore, it is possible to prevent the outer end portion 3e of the negative electrode 3 from being located in the same direction as the second outer end portion 4e (here, to the right). Thus, when the first gripping part 30 moves, the negative electrode 3 can be moved to the left more reliably.

[0127] In the above embodiment, after the pulling action of the first outer end 2e and the second outer end 4e begins in the pulling process S31, the central scraper 81 is moved to a position where it does not contact the electrode body 1 in the central scraper raising process S32. Therefore, when the electrode body 1 is unwound, contact between the electrode body 1 and the central scraper 81 can be prevented. Consequently, the electrode body 1 can be unwound more appropriately.

[0128] [Other Implementation Methods]

[0129] The above describes one embodiment of the electrode body decomposition apparatus and method proposed herein. However, the above embodiment is merely an example, and it can be implemented in other ways.

[0130] In the above embodiment, the central scraper 81 moves vertically via the scraper lifting device 82, but the direction of movement of the central scraper 81 is not limited to this. For example, the central scraper 81 can also move horizontally or backward.

[0131] In the above embodiment, during the pulling process S31, when the first diaphragm 2 and the second diaphragm 4 are pulled, the outer end portion 3e of the negative electrode 3 is exposed between the first diaphragm 2 and the second diaphragm 4, but this is not a limitation. Depending on the length of the negative electrode 3 in the longitudinal direction, the outer end portion 3e of the negative electrode 3 may also be exposed between the first diaphragm 2 and the second diaphragm 4 at the time of the outer end processing process S21. In this case, the scraper lowering process S24 may be performed before the outer end processing process S21.

[0132] In the above embodiment, during the clamp lowering process S33, the electrode body 1 is moved to the outside of the holding portion 21a by lowering the holding clamp 21, but this is not a limitation. In order to move the electrode body 1 to the outside of the holding portion 21a, either only the electrode body 1 can be moved, or both the electrode body 1 and the holding portion 21a (holding clamp 21) can be moved.

[0133] In the above embodiment, the transport path R1 of the first diaphragm 2 and the transport path R2 of the second diaphragm 4 separate to the left and right from the electrode housing portion 20, but the transport paths R1 of the first diaphragm 2 and R2 of the second diaphragm 4 are not particularly limited. The transport paths R1 of the first diaphragm 2 and R2 of the second diaphragm 4 immediately separate in opposite directions after branching, but for example, they may be bent downstream of the branch in a manner in which the negative electrode 3 and the positive electrode 5 are retrieved on the same side.

[0134] The configuration of the first moving device 32 and the second moving device 132 is not particularly limited. For example, the first moving device 32 and the second moving device 132 can also move the first gripper 31 and the second gripper 131 along a guide rail laid according to a predetermined track. For example, the first moving device 32 and the second moving device 132 can also be a multi-axis robot.

[0135] Furthermore, the above-described embodiments are not limited to the present invention except where specifically mentioned. Additionally, the technology disclosed herein can be modified in various ways. Various components or processes mentioned herein can be appropriately omitted or combined unless there are particular problems. This specification includes the disclosures described below.

[0136] Item 1:

[0137] A method for decomposing an electrode body, wherein,

[0138] The above-mentioned electrode body decomposition methods include:

[0139] The process of preparing the electrode body involves laminating a strip-shaped negative electrode and a strip-shaped positive electrode through a strip-shaped first diaphragm and a strip-shaped second diaphragm, and then winding them in a specified winding direction; and

[0140] In the separation process, the first diaphragm and the second diaphragm are pulled out and separated, along with the negative electrode, the second diaphragm, and the positive electrode.

[0141] Item 2:

[0142] The electrode body decomposition method as described in item 1, wherein...

[0143] The above-mentioned electrode body decomposition method also includes:

[0144] A process for preparing a fixture having a frame capable of housing the aforementioned electrode bodies;

[0145] The process of housing the electrode body in the frame;

[0146] The process of holding the outer winding end of the first diaphragm, i.e., the first outer end; and

[0147] The process of holding the outer end of the second diaphragm, i.e. the second outer end.

[0148] Item 3:

[0149] The electrode body decomposition method as described in item 2, wherein...

[0150] The fixture prepared through the above-described preparation process has the following features:

[0151] The first mounting portion that mounts the two ends in the width direction of the first outer end; and

[0152] The second mounting portion, which mounts the two ends of the second outer end in the width direction,

[0153] In the above-described process of holding the first outer end portion, the middle portion of the first outer end portion, which is placed on the first mounting portion, is held in the width direction.

[0154] In the above-described process of holding the second outer end, the middle part of the second outer end, which is placed on the second mounting part, is held in the width direction.

[0155] Item 4:

[0156] The electrode body decomposition method as described in item 2 or 3, wherein...

[0157] The above-mentioned electrode body decomposition method also includes:

[0158] The process of moving the electrode body housed in the frame to the outside of the frame by holding the first outer end and the second outer end.

[0159] Item 5:

[0160] The electrode body decomposition method as described in any one of items 2 to 4, wherein...

[0161] A guide is provided between the first outer end and the second outer end, which guides the wound outer end of the negative electrode, i.e., the negative electrode outer end, so that when the first outer end and the second outer end are pulled and the negative electrode outer end is exposed between the first diaphragm and the second diaphragm, the negative electrode outer end is pulled out to one of the first diaphragm and the second diaphragm.

[0162] Item 6:

[0163] The electrode body decomposition method as described in item 5, wherein...

[0164] The above-mentioned electrode body decomposition method also includes:

[0165] After the extraction of the first and second outer ends in the separation process begins, the guide is moved to a position where it does not contact the electrode body.

[0166] Item 7:

[0167] An electrode body separation device separates an electrode body having a strip-shaped positive electrode and a strip-shaped negative electrode laminated therebetween through a strip-shaped first diaphragm and a strip-shaped second diaphragm, and wound in a predetermined winding direction, wherein...

[0168] The aforementioned electrode body decomposition device includes:

[0169] The first holding part holds the outer winding end of the first diaphragm, i.e., the first outer end.

[0170] The first clamping roller clamps and pulls out the first diaphragm;

[0171] A first moving device that moves the first holding part by introducing the first diaphragm into the first clamping roller;

[0172] The second holding part holds the outer winding end of the second diaphragm, i.e. the second outer end.

[0173] The second clamping roller clamps and pulls out the second diaphragm mentioned above;

[0174] A second moving device that moves the second holding part by introducing the second diaphragm into the second clamping roller; and

[0175] Control device,

[0176] The control device described above is configured to perform the following processes:

[0177] The first outer end portion is gripped by the first gripping part;

[0178] The process of holding the second outer end portion by the second gripping part; and

[0179] The process of moving the first holding part by the first moving device to introduce the first diaphragm into the first clamping roller, and moving the second holding part by the second moving device to introduce the second diaphragm into the second clamping roller, and then extracting the first diaphragm and the second diaphragm.

[0180] Item 8:

[0181] The electrode body decomposition device as described in item 7, wherein...

[0182] The aforementioned electrode disassembly device includes a clamp with an opening on one side, and the clamp has a frame capable of accommodating the aforementioned electrode.

[0183] The above-described process of holding the first diaphragm holds the first outer end of the electrode body housed in the frame.

[0184] The above-described process of holding the second diaphragm holds the second outer end of the electrode body housed in the frame.

[0185] Item 9:

[0186] The electrode body decomposition device as described in item 8, wherein...

[0187] The above-mentioned fixture has:

[0188] The first mounting portion extends from the periphery of the opening toward the outside of the frame at both ends of the electrode body housed in the frame in the width direction, and mounts the first outer end portion; and

[0189] The second mounting portion extends outward from the periphery of the opening relative to the side opposite to the first mounting portion of the opening toward the outside of the frame, and mounts the second outer end portion.

[0190] The above-described process of holding the first diaphragm holds the middle portion in the width direction of the first outer end portion that is placed on the first mounting portion.

[0191] The above-described process of holding the second diaphragm holds the middle portion of the second outer end portion placed on the second mounting portion in the width direction.

[0192] Item 10:

[0193] The electrode body decomposition device as described in item 8 or 9, wherein...

[0194] The aforementioned electrode disassembly apparatus includes a clamp moving device that moves the clamp between a receiving position where the electrode is housed in the frame and a departure position where the frame has moved away from the electrode.

[0195] After the control device grasps the first outer end and the second outer end, it controls the clamp moving device to move the clamp from the receiving position to the departing position.

[0196] Item 11:

[0197] The electrode body decomposition apparatus as described in any one of items 8 to 10, wherein...

[0198] The aforementioned electrode body disintegration device also includes a guide member for guiding the aforementioned negative electrode.

[0199] The guide is configured such that when the first outer end and the second outer end are pulled and the wound outer end of the negative electrode, i.e. the negative electrode outer end, is exposed between the first diaphragm and the second diaphragm, it is disposed between the first diaphragm and the second diaphragm and guides the negative electrode outer end to one of the first diaphragm and the second diaphragm in a predetermined direction.

[0200] Item 12:

[0201] The electrode body decomposition device as described in item 11, wherein...

[0202] The control device is configured to also perform the following process: when the outer end of the negative electrode protrudes from between the first diaphragm and the second diaphragm, the guide is positioned at a predetermined position between the first diaphragm and the second diaphragm, and then the guide is moved from that position.

[0203] Explanation of reference numerals in the attached figures

[0204] 1 Electrode body

[0205] 2. First diaphragm

[0206] 3. Negative electrode plate

[0207] 3S negative electrode laminate (the laminate of the first separator and the negative electrode)

[0208] 3a Negative electrode current collector foil

[0209] 3b Negative electrode active material layer

[0210] 3e outer end

[0211] 5 Positive electrode plates

[0212] 5S Positive Electrode Laminated Sheet (Second Separator and Positive Electrode Laminated Sheet)

[0213] 5a Positive electrode current collector foil

[0214] 5b Positive electrode active material layer

[0215] 5e outer end

[0216] 10 Electrode Body Decomposition Device

[0217] 20 Electrode housing section

[0218] 21. Hold the clamp

[0219] 21L1 First left side

[0220] 21L2 Second left side

[0221] 21R Right side

[0222] 21a Holding section

[0223] 21aa Periphery

[0224] 22 Rotary Box

[0225] 22D bottom surface

[0226] 22h through hole

[0227] 23. Clamp lowering device

[0228] Component 23a

[0229] Cylinder 23b

[0230] 24 Electrode support device

[0231] 24a Supporting components

[0232] 24b cylinder

[0233] 30 First Control Department

[0234] 31 First gripper (first holding component)

[0235] 31F Front Side Gripper

[0236] 31Rr rear side gripper

[0237] 32a Support section

[0238] 32a1 Rotating device

[0239] 32a2 Rotary Motor

[0240] 32b Up and Down Guide Rails

[0241] 32c left and right directional guide rail

[0242] 32d vertical movement motor

[0243] 32e Left and right direction moving motor

[0244] 41L drive roller

[0245] 41R Driven Roller

[0246] 42 Handling motor

[0247] 43 Clamping working cylinder

[0248] 51 Bending Roller (Roll 1)

[0249] 52 scrapers

[0250] 52D lower surface

[0251] 52L base end

[0252] 52R end section

[0253] 52U upper surface

[0254] 53 Scraper Insertion Device

[0255] 53a Guide rod

[0256] 53b Insert working cylinder

[0257] 70 Negative Electrode Recycling Section

[0258] 71 Guide Board

[0259] 72 Negative electrode recycling bin

[0260] 80 Positive and negative electrode separation device

[0261] 81 Central scraper

[0262] 82 Scraper Lifting Device

[0263] 82a cylinder

[0264] 100 Control device

[0265] 130 Second Control Section

[0266] 131 Second gripper (second holding component)

[0267] 131F Front Side Gripper

[0268] 131Rr rear side gripper

[0269] 132a Support section

[0270] 132a1 Rotating device

[0271] 132a2 Rotary Motor

[0272] 132b Up and Down Guide Rails

[0273] 132c left and right direction guide rail

[0274] 132d vertical movement motor

[0275] 132e Left and right movement motor

[0276] 141L drive roller

[0277] 141R Driven Roller

[0278] 142 Handling motor

[0279] 143 Clamping Working Cylinder

[0280] 145 Bending Roller

[0281] 151 Upstream Roller

[0282] 152 Downstream Roller

[0283] 153 Peeling Roller (Roll 2)

[0284] 154 Roller Lowering Device

[0285] 154a cylinder

[0286] 170 Positive Electrode Recycling Section

[0287] A1 axis

[0288] P1 Containment Location

[0289] P2 Leave Position

[0290] R1 Transport path of the first diaphragm

[0291] R1a Bending Section

[0292] R2 Transport path of the second diaphragm

[0293] R2a Bending Section

[0294] S10 Electrode Preparation Process

[0295] S11 Fixture preparation process

[0296] S20 Separation Preparation Process

[0297] S21 External end processing process

[0298] S22 Electrode housing process

[0299] S23 Holding process

[0300] S24 Scraper Lowering Process

[0301] S26 Scraper Lifting Process

[0302] S30 Separation Process

[0303] S31 Pulling process

[0304] S32 Central scraper rising process

[0305] S33 Fixture Lowering Operation

[0306] S34 Support component lifting process

[0307] S35 Negative Electrode Separation Process

[0308] S35b scraper insertion process

[0309] S35c gripper repositioning process

[0310] S135 Positive electrode separation process

[0311] S135a Gripper Movement Process

[0312] S135b Roller Lowering Process

[0313] S135c gripper repositioning process

[0314] W winding shaft

Claims

1. A method for disassembling an electrode body, wherein, The above-mentioned electrode body decomposition methods include: The process of preparing the electrode body involves laminating a strip-shaped negative electrode and a strip-shaped positive electrode through a strip-shaped first diaphragm and a strip-shaped second diaphragm, and then winding them in a specified winding direction; and In the separation process, the first diaphragm and the second diaphragm are pulled out and separated, along with the negative electrode, the second diaphragm, and the positive electrode.

2. The electrode body decomposition method as described in claim 1, wherein, The above-mentioned electrode body decomposition method also includes: A process for preparing a fixture having a frame capable of housing the aforementioned electrode bodies; The process of housing the electrode body in the frame; The process of holding the outer winding end of the first diaphragm, i.e., the first outer end; and The process of holding the outer end of the second diaphragm, i.e. the second outer end.

3. The electrode body decomposition method as described in claim 2, wherein, The fixture prepared through the above-described preparation process has the following features: The first mounting portion that mounts the two ends in the width direction of the first outer end; and The second mounting portion, which mounts the two ends of the second outer end in the width direction, In the above-described process of holding the first outer end portion, the middle portion of the first outer end portion, which is placed on the first mounting portion, is held in the width direction. In the above-described process of holding the second outer end, the middle part of the second outer end, which is placed on the second mounting part, is held in the width direction.

4. The electrode body decomposition method as described in claim 2, wherein, The above-mentioned electrode body decomposition method also includes: The process of moving the electrode body housed in the frame to the outside of the frame by holding the first outer end and the second outer end.

5. The electrode body decomposition method as described in claim 2, wherein, A guide is provided between the first outer end and the second outer end, which guides the wound outer end of the negative electrode, i.e., the negative electrode outer end, so that when the first outer end and the second outer end are pulled and the negative electrode outer end is exposed between the first diaphragm and the second diaphragm, the negative electrode outer end is pulled out to one of the first diaphragm and the second diaphragm.

6. The electrode body decomposition method as described in claim 5, wherein, The above-mentioned electrode body decomposition method also includes: After the extraction of the first and second outer ends in the separation process begins, the guide is moved to a position where it does not contact the electrode body.

7. An electrode body decomposition device, which separates an electrode body, wherein the electrode body has a strip-shaped positive electrode and a strip-shaped negative electrode laminated therebetween, separated by a strip-shaped first diaphragm and a strip-shaped second diaphragm, and is wound in a predetermined winding direction, wherein, The aforementioned electrode body decomposition device includes: The first holding part holds the outer winding end of the first diaphragm, i.e., the first outer end. The first clamping roller clamps and pulls out the first diaphragm; A first moving device that moves the first holding part by introducing the first diaphragm into the first clamping roller; The second holding part holds the outer winding end of the second diaphragm, i.e. the second outer end. The second clamping roller clamps and pulls out the second diaphragm mentioned above; A second moving device that moves the second holding part by introducing the second diaphragm into the second clamping roller; as well as Control device, The control device described above is configured to perform the following processes: The first outer end portion is gripped by the first gripping part; The process of holding the second outer end portion by the second gripping part; and The process of moving the first holding part by the first moving device to introduce the first diaphragm into the first clamping roller, and moving the second holding part by the second moving device to introduce the second diaphragm into the second clamping roller, and then extracting the first diaphragm and the second diaphragm.

8. The electrode body decomposition apparatus as described in claim 7, wherein, The aforementioned electrode disassembly device includes a clamp with an opening on one side, and the clamp has a frame capable of accommodating the aforementioned electrode. The above-described process of holding the first diaphragm holds the first outer end of the electrode body housed in the frame. The above-described process of holding the second diaphragm holds the second outer end of the electrode body housed in the frame.

9. The electrode body decomposition apparatus as described in claim 8, wherein, The above-mentioned fixture has: The first mounting portion extends from the periphery of the opening toward the outside of the frame at both ends of the electrode body housed in the frame in the width direction, and mounts the first outer end portion; and The second mounting portion extends outward from the periphery of the opening relative to the side opposite to the first mounting portion of the opening toward the outside of the frame, and mounts the second outer end portion. The above-described process of holding the first diaphragm holds the middle portion in the width direction of the first outer end portion that is placed on the first mounting portion. The above-described process of holding the second diaphragm holds the middle portion of the second outer end portion placed on the second mounting portion in the width direction.

10. The electrode body decomposition apparatus as described in claim 8, wherein, The aforementioned electrode disassembly apparatus includes a clamp moving device that moves the clamp between a receiving position where the electrode is housed in the frame and a departure position where the frame has moved away from the electrode. After the control device grasps the first outer end and the second outer end, it controls the clamp moving device to move the clamp from the receiving position to the departing position.

11. The electrode body decomposition apparatus as described in claim 8, wherein, The aforementioned electrode body disintegration device also includes a guide member for guiding the aforementioned negative electrode. The guide is configured such that when the first outer end and the second outer end are pulled and the wound outer end of the negative electrode, i.e. the negative electrode outer end, is exposed between the first diaphragm and the second diaphragm, it is disposed between the first diaphragm and the second diaphragm and guides the negative electrode outer end to one of the first diaphragm and the second diaphragm in a predetermined direction.

12. The electrode body decomposition apparatus as described in claim 11, wherein, The control device is configured to also perform the following process: when the outer end of the negative electrode protrudes from between the first diaphragm and the second diaphragm, the guide is positioned at a predetermined position between the first diaphragm and the second diaphragm, and then the guide is moved from that position.

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