JP2017033752A - Electrode lamination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode lamination device which allows for alternative lamination of a positive electrode and a negative electrode, while suppressing the installation area of the device.SOLUTION: An electrode lamination device 20 includes a lamination 30 where a positive electrode 10 with a separator and a negative electrode 12 are laminated alternately, a first conveyance section 40 for sequentially conveying the positive electrodes 10 with a separator while descending after ascending temporarily, and a second conveyance section 50 for sequentially conveying the negative electrodes 12 while descending after ascending temporarily. The first conveyance section 40 has a first guide member 44 for guiding the descending positive electrode 10 with a separator toward the lamination 30. The second conveyance section 50 has a second guide member 54 for guiding the descending negative electrode 12 toward the lamination 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electrode stacking apparatus.

  A manufacturing process of a secondary battery such as a lithium ion secondary battery can be roughly divided into a positive electrode manufacturing process, a negative electrode manufacturing process, and an assembling process of assembling a battery using the manufactured positive and negative electrodes. When the structure of the electrode assembly of the secondary battery is a stacked type, first, in the assembly process, the positive and negative electrodes are stacked using an electrode stacking apparatus. As a conventional electrode laminating apparatus, as described in Patent Document 1, for example, an electrode laminating apparatus for alternately laminating positive electrodes and negative electrodes in a laminating portion is known. The electrode stacking apparatus includes a roller pair as a supply mechanism that supplies a positive electrode to the stacking section, and a roller pair as a supply mechanism that supplies a negative electrode to the stacking section. Various supply mechanisms for supplying a transported object such as an electrode body to a predetermined position are known in technical fields other than the electrode stacking apparatus. For example, the horizontal servo loop slider of Non-Patent Document 1 includes a supply mechanism having an annular conveying member extending in the horizontal direction. Also in the electrode stacking apparatus, such a supply mechanism can be applied according to design conditions and the like.

JP 2011-258418 A

“Horizontal Servo Loop Slider”, [online], Maruyasu Machinery Co., Ltd. [Search June 08, 2015], Internet <URL: http://www.maruyasukikai.co.jp/newproduct/2014/servo-loop2. html>

  However, when the supply mechanism of Non-Patent Document 1 is applied to the electrode stacking apparatus as described above, the following problems exist. That is, since the supply mechanism is provided corresponding to each of the positive electrode (positive electrode) and the negative electrode (negative electrode), the electrode stacking apparatus includes two supply mechanisms. In this case, the installation area of the electrode stacking apparatus increases.

  An object of this invention is to provide the electrode lamination apparatus which can laminate | stack a positive electrode and a negative electrode alternately, suppressing the installation area of an apparatus.

  The electrode stacking apparatus of the present invention includes a stacking unit in which positive and negative electrodes are alternately stacked, a first transporting unit that sequentially transports the positive electrode after being lifted, and a negative electrode after being lifted once A first transport member that sequentially guides the positive electrode to be lowered toward the stacking unit, and the second transport unit is lowered. It has the 2nd guide member which guides a negative electrode toward a lamination | stacking part.

  The electrode stacking apparatus includes a first transport unit that sequentially transports the positive electrode after being raised and then lowered, and a second transport unit that sequentially conveys the negative electrode after being lifted and lowered. . Thereby, since each conveyance part has the conveyance member which goes to a perpendicular direction, the conveyance member extended in a horizontal direction can be omitted. Therefore, the installation area of the electrode stacking apparatus can be suppressed. In addition, the first transport unit includes a first guide member that guides the positive electrode that is lowered toward the stacked unit, and the second transport unit is a second guide member that guides the negative electrode that is lowered toward the stacked unit. have. Thereby, the positive electrode and negative electrode to be lowered can be suitably stacked on the stacked portion. As described above, the positive electrode and the negative electrode can be alternately stacked while suppressing the installation area of the electrode stacking apparatus.

  In the electrode stacking apparatus of the present invention, the first transport unit further includes a loop-shaped first transport member extending in the vertical direction, and the first transport member is circulated to first raise the positive electrode and then lower the first positive electrode. The second conveying unit further includes a loop-shaped second conveying member extending in the vertical direction, and the negative electrode is once raised and lowered by circulating the second conveying member, and the first guide member is the first conveying member. The first guide surface extends obliquely downward from the top toward the stacked portion, and the second guide member includes a second guide surface extending obliquely downward from the second transport member toward the stacked portion. Also good. Thereby, it is possible to realize a configuration in which the positive electrode and the negative electrode are once lifted and then sequentially conveyed while being lowered, and a configuration in which the lowered positive electrode and the negative electrode are guided toward the stacked portion with simple equipment.

  In the electrode stacking apparatus of the present invention, the first transport member is movable in the vertical direction with respect to the first guide member and the stacked portion, and the second transport member is vertically moved with respect to the second guide member and the stacked portion. It may be movable relative to the direction. Thereby, a positive electrode can be temporarily stored in the 1st conveyance member, and a negative electrode can be temporarily stored in the 2nd conveyance member. Therefore, for example, it is not necessary to stop the process upstream of the first transport member and the process upstream of the second transport member.

  The electrode stacking apparatus of the present invention is located between the first transport unit and the second transport unit, and slides the positive electrode transported from the first transport unit and the negative electrode transported from the second transport unit to the stack unit. May be further provided. Thereby, when laminating | stacking a positive electrode and a negative electrode on a laminated part, the position of the end of a positive electrode and a negative electrode can be match | combined.

  The electrode stacking apparatus according to the present invention is located between the first transport unit and the second transport unit, and transports the positive electrode transported from the first transport unit and the negative electrode transported from the second transport unit to the slider. You may further provide a conveyance part. Thereby, for example, by making the transport speed of the third transport section faster than the sliding speed of the slider, the overlap of the positive electrode and the negative electrode that are alternately transferred from the first transport section and the second transport section to the third transport section is prevented. Can be suppressed.

  According to the present invention, the positive electrode and the negative electrode can be alternately stacked while suppressing the installation area of the apparatus.

It is sectional drawing which shows an example of the internal structure of the electrical storage apparatus manufactured by applying the electrode lamination apparatus of one Embodiment of this invention. It is the II-II sectional view taken on the line in FIG. 1 is a front view schematically showing an electrode stacking apparatus according to an embodiment of the present invention. It is the IV-IV sectional view taken on the line in FIG. It is a figure which shows before the downward movement operation | movement of a 1st conveying member. It is a figure which shows after the downward movement operation | movement of a 1st conveying member. It is a figure which shows after the raising operation | movement of a 1st conveying member. It is a top view which shows roughly the modification of the electrode lamination apparatus of FIG. It is a top view which shows roughly the other modification of the electrode lamination apparatus of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a cross-sectional view showing an example of the internal configuration of a power storage device manufactured by applying the electrode stacking apparatus according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. As illustrated in FIGS. 1 and 2, the power storage device 1 is configured as an in-vehicle nonaqueous electrolyte secondary battery such as a lithium ion secondary battery.

  The power storage device 1 includes a hollow case 2 having a substantially rectangular parallelepiped shape, for example, and an electrode assembly 3 accommodated in the case 2. The case 2 is made of a metal such as aluminum. An insulating film (not shown) is provided on the inner wall surface of the case 2. For example, a non-aqueous organic solvent-based electrolyte is injected into the case 2. In the electrode assembly 3, the positive electrode active material layer 15 of the positive electrode 11, the negative electrode active material layer 18 of the negative electrode 12, and the separator 13 described later are porous, and the pores are impregnated with the electrolytic solution. . On the upper surface of the case 2, the positive terminal 5 and the negative terminal 6 are disposed so as to be separated from each other. The positive electrode terminal 5 is fixed to the case 2 via an insulating ring 7, and the negative electrode terminal 6 is fixed to the case 2 via an insulating ring 8.

  The electrode assembly 3 is a stacked electrode assembly including a positive electrode 11 and a negative electrode 12, and a bag-shaped separator 13 disposed between the positive electrode 11 and the negative electrode 12. In the separator 13, the positive electrode 11 is accommodated here. With the positive electrode 11 housed in the separator 13, the positive electrode 11 and the negative electrode 12 are alternately stacked via the separator 13. That is, the electrode assembly 3 includes the separator-attached positive electrode 10 configured by housing the positive electrode 11 in the bag-shaped separator 13.

  The positive electrode 11 includes, for example, a metal foil 14 made of an aluminum foil, and a positive electrode active material layer 15 formed on both surfaces of the metal foil 14. The metal foil 14 includes a substantially rectangular metal foil main body portion 14 a and tabs 14 b formed on the upper edge portion of the metal foil main body portion 14 a corresponding to the position of the positive electrode terminal 5. The tab 14 b extends upward from the upper edge portion of the metal foil main body portion 14 a and is connected to the positive electrode terminal 5 via the conductive member 16. The positive electrode active material layer 15 is a porous layer formed including a positive electrode active material and a binder. In other words, the positive electrode active material is supported on both surfaces of the metal foil main body portion 14a. Examples of the positive electrode active material include composite oxide, metallic lithium, and sulfur. The composite oxide includes, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium.

  The negative electrode 12 includes a metal foil 17 made of, for example, copper foil, and a negative electrode active material layer 18 formed on both surfaces of the metal foil 17. The metal foil 17 is composed of a substantially rectangular metal foil main body portion 17a and a tab 17b formed on the upper edge portion of the metal foil main body portion 17a corresponding to the position of the negative electrode terminal 6. The tab 17 b extends upward from the upper edge portion of the metal foil main body portion 17 a and is connected to the negative electrode terminal 6 via the conductive member 19. The negative electrode active material layer 18 is a porous layer formed including a negative electrode active material and a binder. In other words, the negative electrode active material is supported on both surfaces of the metal foil main body portion 17a. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And the like, and boron-added carbon.

  The separator 13 is formed in a bag shape, for example, and accommodates only the positive electrode 11 therein. Examples of the material for forming the separator 13 include a porous film made of a polyolefin-based resin such as polyethylene (PE) and polypropylene (PP), or a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like. The The tabs 14 b and 17 b of the positive electrode 11 and the negative electrode 12 protrude upward from the substantially rectangular separator 13.

  Then, the manufacturing process of the electrical storage apparatus 1 is demonstrated. The manufacturing process of the power storage device 1 includes a manufacturing process of the positive electrode 11 and a manufacturing process of the negative electrode 12, a manufacturing process of the positive electrode 10 with a separator, an assembly process of assembling the power storage device 1 using the positive electrode 10 and the negative electrode 12 with a separator, It has. The assembly process includes a stacking process in which positive and negative electrodes are stacked at the beginning, and the order of each process is the manufacturing process of the positive electrode 11, the manufacturing process of the negative electrode 12, the manufacturing process of the positive electrode with separator 10, and the assembly process (lamination). Process).

  Since the manufacturing process of the positive electrode 11 and the manufacturing process of the negative electrode 12 are not different from known techniques, description of these manufacturing processes is omitted. In the manufacturing process of the separator-attached positive electrode 10, the positive electrode 11 is disposed between the pair of strip-shaped separators 13 and 13, and the pair of separators 13 and 13 are welded along the outer periphery of the positive electrode 11. The positive electrode 11 is wrapped with the separators 13 and 13. Thereafter, the pair of separators 13 and 13 are cut into individual pieces in units of electrodes, whereby the positive electrode 10 with a separator is manufactured. In the stacking step, the positive electrode 10 with a separator and the negative electrode 12 are stacked using an electrode stacking device 20 (see FIG. 3). The configuration of the electrode stacking apparatus 20 will be described later. In the assembly process after the stacking process, the stacked positive electrode 10 with separator and negative electrode 12 are fixed and integrated with each other with a tape to obtain the electrode assembly 3. Thereafter, the tab 14 b of the positive electrode 11 and the tab 17 b of the negative electrode 12 are connected to the conductive members 16 and 19 and the positive electrode terminal 5 and the negative electrode terminal 6, respectively, and the electrode assembly 3 is accommodated in the case 2.

  As shown in FIG. 3, the electrode stacking apparatus 20 includes a stacking unit 30, a first transport unit 40, and a second transport unit 50. The stacked unit 30 is disposed between the first transport unit 40 and the second transport unit 50. In the lamination part 30, the positive electrode 10 with a separator and the negative electrode 12 are laminated | stacked alternately. The 1st conveyance part 40 conveys sequentially the positive electrode 10 with a separator to the lamination | stacking part 30 directly, raising once and then descending. The second transport unit 50 sequentially and sequentially transports the negative electrode 12 directly to the stacked unit 30 while being lowered and then lowered.

  The stacking unit 30 is, for example, a stacking jig whose upper side is open. The separator-attached positive electrode 10 and the negative electrode 12 are alternately stacked on the bottom surface 31 of the stacked unit 30. Each main surface of the laminated positive electrode 10 with separator and negative electrode 12 is parallel to the bottom surface 31. The side surface 32 of the laminated part 30 is in contact with each end face of the positive electrode with separator 10 and the negative electrode 12 to position the positive electrode with separator 10 and the negative electrode 12. In the present embodiment, the shape and size of the separator-attached positive electrode 10 and the negative electrode 12 are substantially equal.

  The first transport unit 40 includes a first transport member 41, a first drive unit 42, a plurality of first placement units 43, and a pair of first guide members 44 and 44 (see FIG. 4). Have.

  The first transport member 41 is a loop-shaped transport member that extends in the vertical direction. The 1st conveyance member 41 is arrange | positioned at the side of the lamination | stacking part 30 (left side of the lamination | stacking part 30 in FIG. 3). The 1st conveyance member 41 is comprised, for example from the endless belt. The first transport member 41 is wound around a pair of rollers 45 and 45 facing away from each other in the vertical direction. When the pair of rollers 45 and 45 are rotated, the first transport member 41 is rotated. A part of the path through which the first transport member 41 circulates is a transport path. The first transport member 41 is movable relative to the first guide member 44 and the stacked unit 30 in the vertical direction.

  The first driving unit 42 applies a rotational driving force to the roller pairs 45 and 45. The first drive unit 42 includes, for example, a transport motor (not shown). When a rotational driving force is applied from the first drive unit 42 to the roller pairs 45, 45, the first transport member 41 rotates. The first drive unit 42 also has a lifting motor (not shown) that lifts and lowers the first transport member 41. The first transport member 41 is moved up and down by a lifting drive force applied from the first drive unit 42 in a predetermined case described later.

  The positive electrodes with separators 10 are sequentially placed on the plurality of first placement portions 43. The first placement portion 43 is erected on the outer peripheral surface 41 a of the first transport member 41 at predetermined intervals along the circumferential direction of the first transport member 41. As shown in FIG. 4, the first placement unit 43 includes a plurality of (three in this example) placement tables arranged at predetermined intervals in the width direction (the vertical direction in FIG. 4) of the first transport member 41. 43a. The mounting table 43a is, for example, a plate member. The separator-attached positive electrode 10 is placed so as to straddle the three placement tables 43a.

  As shown in FIG. 3, the pair of first guide members 44 and 44 guides the positive electrode 10 with the separator to be lowered toward the stacked unit 30. The first guide member 44 is located closer to the stacked unit 30 than the first transport member 41. As shown in FIG. 4, the pair of first guide members 44, 44 are respectively disposed between the mounting bases 43 a, 43 a of the first mounting portion 43 so as to face each other in the width direction of the first transport member 41. Has been placed.

  More specifically, the 1st guide member 44 is comprised by the plate member of the substantially right triangle shape, as FIG. 3 shows. The 1st guide member 44 is located in the state which turned the upper corner part 44a which is the acute angle upward. The first guide member 44 has a side surface 44b extending in the vertical direction, a first guide surface 44c inclined with respect to the vertical direction, and a bottom surface 44d extending in the horizontal direction. A connecting portion between the side surface 44b and the first guide surface 44c constitutes an upper corner portion 44a. The first guide surface 44 c extends obliquely downward (lower right side in FIG. 3) from the top of the first transport member 41 toward the stacked unit 30. The width of the first guide member 44 (the length in the direction orthogonal to the outer peripheral surface 41a of the first transport member 41) becomes wider from the upper end portion (upper corner portion 44a) toward the lower end portion. The width of the lower end portion of the first guide member 44 is approximately the same as or slightly shorter than the length of the first placement portion 43 in the standing direction.

  The first guide member 44 is separated from the first transport member 41 and the first placement portion 43. That is, the first guide member 44 is fixed at a predetermined position without being accompanied by the first transport member 41. The 1st guide member 44 is being fixed to the housing | casing (illustration omitted) of the electrode lamination apparatus 20, for example. In addition, it can be said that the positional relationship between the first guide member 44 and the stacked portion 30 is important in ensuring the positional accuracy between the stacked positive electrode with separator 10 and negative electrode 12. Therefore, it is desirable that the first guide member 44 and the laminated portion 30 are positioned in the same housing, for example. Further, in the present embodiment, the pair of first guide members 44 and 44 is used, but one first guide member 44 may be used, or three or more first guide members 44 may be used.

  The second transport unit 50 includes a second transport member 51, a second drive unit 52, a plurality of second placement units 53, and a pair of second guide members 54 and 54. In the present embodiment, the first transport unit 40 and the second transport unit 50 are arranged symmetrically with respect to the stacked unit 30. On the other hand, the component of each part of the 1st conveyance part 40 and the 2nd conveyance part 50 is the same. That is, the second transport member 51 is a loop-shaped transport member that extends in the vertical direction, like the first transport member 41. The second conveying member 51 is movable relative to the second guide member 54 and the stacked unit 30 in the vertical direction. Similar to the first guide member 44, the second guide member 54 guides the negative electrode 12 that is lowered toward the stacked portion 30. In addition, the second guide member 54 has a second guide surface 54 c that extends obliquely downward from the second transport member 51 toward the stacked unit 30. The other description regarding the component of each part is abbreviate | omitted. In addition, the 1st conveyance part 40 and the 2nd conveyance part 50 do not need to be arrange | positioned left-right symmetrically with respect to the lamination | stacking part 30, and the component of each part of the 1st conveyance part 40 and the 2nd conveyance part 50 is as follows. , They do not have to be the same.

  A stacking step is performed by the electrode stacking apparatus 20 configured as described above. As shown in FIG. 3, the positive electrode 10 with a separator is moved from the belt conveyor 61 disposed on the side of the first conveying unit 40 (on the opposite side of the stacking unit 30 with respect to the first conveying unit 40) to the first conveying unit. 40 are sequentially transported to the first placement unit 43. At this time, in this embodiment, the tab 14b of the positive electrode 10 with a separator is directed to one side (see FIG. 4) of the first conveying member 41 in the width direction.

  The separator-attached positive electrode 10 placed on the first placement portion 43 once rises due to the circulation of the first transport member 41 and then falls. At this time, the positive electrode 10 with a separator is reversed. That is, one main surface of the separator-attached positive electrode 10 that faces upward when rising is directed downward when descending. When the positive electrode 10 with a separator is lowered to a predetermined position, it reaches the upper end portion (upper corner portion 44a) of the first guide member 44. Then, as the separator-attached positive electrode 10 is lowered, the separator 10 moves away from the first transport member 41 along the first guide surface 44 c of the first guide member 44, and the first mounting is performed at the lower end of the first guide member 44. It falls from the part 43. The dropped positive electrode 10 with a separator is stacked on the stacked unit 30.

  As described above, the first transport unit 40 rotates the first transport member 41 to once raise the positive electrode 10 with the separator and then lowers the positive electrode 10 with the separator by the first guide member 44. Guide to 30. As a result, the positive electrode with separator 10 falls from the first transport unit 40 and is stacked on the stacking unit 30.

  Simultaneously with the laminating step of the separator-attached positive electrode 10, the negative electrode 12 is moved from the belt conveyor 62 disposed on the side of the second conveying unit 50 (on the opposite side of the laminating unit 30 with respect to the second conveying unit 50) to the second conveying unit. 50 are sequentially conveyed to the second placement unit 53. At this time, in this embodiment, the tab 17b of the negative electrode 12 is directed to one side (not shown) in the width direction of the second transport member 51, similarly to the tab 14b of the positive electrode 10 with a separator.

  The negative electrode 12 placed on the second placement unit 53 rises once by the rotation of the second transport member 51 and then falls. At this time, the negative electrode 12 is inverted. That is, one main surface of the negative electrode 12 facing upward when rising is directed downward when descending. When the negative electrode 12 is lowered to a predetermined position, the negative electrode 12 reaches the upper end portion (upper corner portion 54a) of the second guide member 54. As the negative electrode 12 is lowered, the negative electrode 12 moves away from the second transport member 51 along the second guide surface 54 c of the second guide member 54, and the second placement portion 53 is formed at the lower end portion of the second guide member 54. Fall from. The fallen negative electrode 12 is stacked on the stacked unit 30.

  As described above, the second transport unit 50 rotates the second transport member 51 to once raise the negative electrode 12 and then lowers the negative electrode 12 toward the stacked unit 30 by the second guide member 54. invite. As a result, the negative electrode 12 falls from the second transport unit 50 and is stacked on the stacked unit 30.

  The electrode stacking apparatus 20 further includes a control unit 70. The control unit 70 controls the lifting and lowering operations of the first transport member 41 and the second transport member 51 based on the missing part information of the positive electrode with separator 10 and the negative electrode 12. The missing part information is information that at least a part of the separator-attached positive electrode 10 and the negative electrode 12 that should be sequentially conveyed at predetermined intervals by the belt conveyors 61 and 62 is missing. The missing item information is detected by, for example, a detection sensor or the like in a transport process using the belt conveyors 61 and 62 or a process upstream of the transport process. The raising / lowering operation of the first conveying member 41 and the second conveying member 51 is performed by driving the raising / lowering motors of the first driving unit 42 and the second driving unit 52 according to instructions from the control unit 70.

  An example in which the first transport member 41 is lowered is shown. As shown in FIG. 5, when a shortage occurs in the separator-equipped positive electrode 10 conveyed by the belt conveyor 61, if the stacking only by circulation of the first conveying member 41 is continued, the separator-equipped positive electrode 10 is not placed. One mounting portion 43 is generated, and finally, one piece of the separator-attached positive electrode 10 is generated in the stacked portion 30. Therefore, in this case, the control unit 70 reduces the speed of the circulating movement of the first transport member 41 in half based on the missing part information of the positive electrode 10 with a separator obtained in advance, and instead, at the same half speed, 1 The entire conveying member 41 is moved downward. At this time, the first mounting portion 43 integrated with the first transport member 41 and the separator-attached positive electrode 10 mounted on the first mounting portion 43 move together. When this state is viewed from the belt conveyor 61 side, the empty first placement portion 43 does not move, but waits for the next positive electrode 10 with a separator. On the other hand, when viewed from the first guide member 44 and the laminated portion 30 side, the first placement portion 43 on which the separator-attached positive electrode 10 is placed is lowered at the same speed as normal circulation.

  Thus, even when a shortage occurs in the positive electrode 10 with a separator, it is not necessary to stop the electrode stacking apparatus 20 by moving the first conveying member 41 downward. FIGS. 5 and 6 are explanations for a case where a shortage occurs in the positive electrode 10 with a separator. However, when a shortage occurs in the negative electrode 12, the operation of the second conveying member 51 is as described above. Is implemented as follows.

  Next, an example in which the first transport member 41 is moved upward will be described. The raising operation of the first conveying member 41 is performed in a situation where a shortage occurs in the negative electrode 12, the negative electrode 12 is not present in the second conveying member 51, and the negative electrode 12 is not supplied to the stacked unit 30. As shown in FIG. 7, the separator-carrying positive electrode 10 located in the vicinity of the first guide member 44 is stopped by reducing the circulation speed of the first transport member 41 by half and raising the circulation speed at the same speed. Thereby, the situation where the positive electrode 10 with a separator is not supplied to the lamination | stacking part 30 can be created. At this time, the separator-equipped positive electrode 10 conveyed from the belt conveyor 61 is sequentially placed on the first placement unit 43. That is, the positive electrode 10 with a separator is sequentially stored in the first transport unit 40.

  As described above, even when the negative electrode 12 is out of stock, the negative electrode 12 is not present in the second conveying member 51, and the negative electrode 12 is not supplied to the stacked unit 30, the first conveying member 41 is raised. By operating, it is not necessary to stop the positive electrode manufacturing process in the upstream process. 7 illustrates the case where a shortage occurs in the negative electrode 12, but when the shortage occurs in the positive electrode 10 with a separator, the ascending operation of the second transport member 51 is as described above. To be implemented.

  Another example is shown. The raising operation of the first conveying member 41 is performed in a situation where there is a problem in the laminated portion 30 and the downstream manufacturing process and the positive electrode with separator 10 and the negative electrode 12 cannot be supplied to the laminated portion 30. At this time, the circulation speed of the first conveyance member 41 and the second conveyance member 51 is reduced by half and the increase operation at the same speed stops the supply of the positive electrode with separator 10 and the negative electrode 12 to the stacked unit 30. The On the other hand, the positive electrode with separator 10 conveyed from the belt conveyor 61 and the negative electrode 12 conveyed from the belt conveyor 62 are sequentially placed on the first placement unit 43 and the second placement unit 53. That is, the positive electrode 10 with a separator is stored in the first transport unit 40 and the negative electrode 12 is stored in the second transport unit 50 in sequence.

  Thus, even if there is a problem in the downstream manufacturing process and the positive electrode 10 with the separator and the negative electrode 12 cannot be supplied to the stacked portion 30, the first conveying member 41 and the second conveying member 51 are moved up. It is not necessary to stop the manufacturing process of the positive and negative electrodes in the upstream process.

  As described above, the electrode stacking apparatus 20 includes the first transport unit 40 that transports the positive electrode 10 with the separator once and then sequentially lowers the positive electrode 10 and the negative electrode 12, and then sequentially lifts and lowers the negative electrode 12. And a second transport unit 50 for transporting. Thereby, since the 1st conveyance part 40 and the 2nd conveyance part 50 have the 1st conveyance member 41 and the 2nd conveyance member 51 which go to a perpendicular direction, the conveyance member extended in a horizontal direction can be omitted. Therefore, the installation area of the electrode stacking apparatus 20 can be suppressed. In addition, the first transport unit 40 includes a first guide member 44 that guides the positive electrode 10 with a separator to be lowered toward the stacked unit 30, and the second transport unit 50 provides the negative electrode 12 to be moved down to the stacked unit 30. It has the 2nd guide member 54 which guides toward. Thereby, the positive electrode 10 with a separator and the negative electrode 12 to be lowered can be suitably stacked on the stacked portion 30. By the above, the positive electrode 10 with a separator and the negative electrode 12 can be laminated | stacked alternately, suppressing the installation area of the electrode lamination apparatus 20. FIG.

  Moreover, the 1st conveyance part 40 has the loop-shaped 1st conveyance member 41 extended in a perpendicular direction, and rotates the 1st conveyance member 41, and then raises the separator-equipped positive electrode 10 and then lowers it. The second transport unit 50 includes a loop-shaped second transport member 51 extending in the vertical direction. The second transport member 51 rotates the second transport member 51 to temporarily raise the negative electrode 12 and then lower it. The first guide member 44 has a first guide surface 44 c that extends obliquely downward from the first transport member 41 toward the stacked unit 30. The second guide member 54 has a second guide surface 54 c that extends obliquely downward from the second transport member 51 toward the stacked unit 30. Thereby, the configuration in which the positive electrode 10 and the negative electrode 12 with separators are once lifted and then sequentially conveyed while being lowered, and the configuration in which the positive electrode 10 and the negative electrode 12 with separators to be lowered are guided toward the laminated portion 30 are simplified. Can be realized with equipment.

  The first transport member 41 is movable in the vertical direction with respect to the first guide member 44 and the stacked unit 30, and the second transport member 51 is moved with respect to the second guide member 54 and the stacked unit 30. It is relatively movable in the vertical direction. Thereby, the positive electrode 10 with a separator can be temporarily stored in the first transport member 41, and the negative electrode 12 can be temporarily stored in the second transport member 51. Therefore, it is not necessary to stop the process upstream of the first transport member 41 and the process upstream of the second transport member 51.

  In other words, the positive electrode 10 with a separator and the first conveying member 41 or the second conveying member 51 move up and down based on the manufacturing process of the positive and negative electrodes upstream of the manufacturing process, or information on the downstream side of the manufacturing process. The negative electrode 12 is temporarily stored or discharged. Thereby, the number of the facilities to stop can be reduced. This point will be described in detail together with the background. In the manufacturing process of the positive electrode 11 and the manufacturing process of the negative electrode 12, for example, defective products are generated due to contamination of foreign matters, and missing products are generated by removing the defective products in the inspection process. . If the positive electrode 11 and the negative electrode 12 manufactured in the manufacturing process of the positive electrode 11 and the negative electrode 12 are once accumulated in the magazine and then transported to the assembly process each time, the problem of shortage is suppressed. The However, since conveyance in units of magazines has a large loss, it is conceivable that the manufacturing process of positive and negative electrodes and the assembly process are directly connected by a conveying device such as a belt conveyor. In such a case, if a shortage occurs in one place, such as a manufacturing process of the positive and negative electrodes, the other processes must be stopped. In the above-described embodiment, the positive electrode with separator 10 and the negative electrode 12 are temporarily connected. Because it has a function to store automatically, the impact can be reduced.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  For example, in the above-described embodiment, the first transport unit 40 sequentially transports the positive electrode with separator 10 directly to the stacking unit 30, and the second transport unit 50 transports the negative electrode 12 directly to the stacking unit 30 sequentially. ing. However, the first transport unit 40 may indirectly transport the positive electrode with separator 10 to the stacking unit 30 sequentially, and the second transport unit 50 may transport the negative electrode 12 to the stacking unit 30 sequentially.

  Specifically, as illustrated in FIG. 8, the electrode stacking apparatus 20 may further include a slider 81. The slider 81 is positioned between the first transport unit 40 and the second transport unit 50, and laminates the positive electrode with separator 10 transported from the first transport unit 40 and the negative electrode 12 transported from the second transport unit 50. Slide to 30. The slider 81 is inclined toward the stacked unit 30. The opening of the stacked portion 30 is inclined toward the lower end portion of the slider 81. Thereby, when laminating | stacking the positive electrode 10 with a separator and the negative electrode 12 on the lamination | stacking part 30, the position of the lower end of the positive electrode 10 with a separator and the negative electrode 12 can be arrange | equalized with the bottom face 31 of the lamination | stacking part 30. In addition, the positions of the side ends of the positive electrode 11 and the negative electrode 12 can be aligned by the side surface 32 of the stacked unit 30 by appropriately changing the inclination directions of the slider 81 and the stacked unit 30.

  Further, as illustrated in FIG. 9, the electrode stacking apparatus 20 may further include a third transport unit 82. The third transport unit 82 is located between the first transport unit 40 and the second transport unit 50, and the positive electrode 10 with a separator transported from the first transport unit 40 and the negative electrode 12 transported from the second transport unit 50. Is conveyed to the slider 81. As the 3rd conveyance part 82, a belt conveyor etc. are mentioned, for example. Thereby, for example, by making the transport speed of the third transport section 82 faster than the sliding speed of the slider 81, the separators are alternately transferred from the first transport section 40 and the second transport section 50 to the third transport section 82. The overlapping of the attached positive electrode 10 and the negative electrode 12 can be suppressed.

  Moreover, in the said embodiment, although the positive electrode 10 with a separator and the negative electrode 12 are mentioned as an electrode laminated | stacked by the laminated part 30 alternately, the positive electrode 11 and the negative electrode with a separator may be sufficient. In addition, while supplying the zigzag separator to the stacking unit 30, the positive electrode 11 transported from the first transport unit 40 and the negative electrode 12 transported from the second transport unit 50 are alternately passed to the stacking unit 30 via the separator. May be laminated.

  DESCRIPTION OF SYMBOLS 10 ... Positive electrode with a separator (positive electrode), 12 ... Negative electrode, 30 ... Lamination | stacking part, 40 ... 1st conveyance part, 41 ... 1st conveyance member, 44 ... 1st guide member, 44c ... 1st guide surface, 50 ... 2nd Conveying section, 51 ... second conveying member, 54 ... second guiding member, 54c ... second guiding surface, 81 ... slider, 82 ... third conveying section.

Claims (5)

A laminated portion in which positive and negative electrodes are alternately laminated;
A first transport unit that transports the positive electrode sequentially while being raised and then lowered;
A second transport unit that transports the negative electrode in a sequential manner while being lowered and then lowered;
The first transport unit includes a first guide member that guides the positive electrode to be lowered toward the stacked unit,
The second transport unit includes an electrode stacking apparatus including a second guide member that guides the negative electrode to be lowered toward the stack unit. The first transport unit further includes a loop-shaped first transport member extending in a vertical direction, and the positive electrode is temporarily raised and lowered by circulating the first transport member,
The second transport unit further includes a loop-shaped second transport member extending in the vertical direction, and the second transport member is circulated through the second transport member to raise and then lower the negative electrode,
The first guide member has a first guide surface extending obliquely downward from the first transport member toward the stacked portion,
2. The electrode stacking apparatus according to claim 1, wherein the second guide member has a second guide surface extending obliquely downward from the second transport member toward the stacking unit. The first transport member is movable in the vertical direction relative to the first guide member and the stacked portion,
3. The electrode stacking apparatus according to claim 2, wherein the second transport member is movable relative to the second guide member and the stacking portion in the vertical direction.   A slider that is positioned between the first transport unit and the second transport unit and that slides the positive electrode transported from the first transport unit and the negative electrode transported from the second transport unit to the stacked unit; The electrode stacking apparatus according to claim 1, further comprising:   A third transport which is located between the first transport section and the second transport section and transports the positive electrode transported from the first transport section and the negative electrode transported from the second transport section to the slider. The electrode stacking apparatus according to claim 4, further comprising a unit.

Images