JP6836136B2 - Laminated battery manufacturing equipment - Google Patents

Description

The present invention relates to a laminated battery manufacturing apparatus for manufacturing a laminated battery having a structure in which first electrode and second electrode, which are strip-shaped foils, are alternately laminated.

Conventionally, as a secondary battery or other battery, a battery having a built-in electrode laminate in which a first electrode and a second electrode are alternately laminated has been used. Some of such electrode laminates have a structure in which strip-shaped foils are used as the first electrode and the second electrode, and these are laminated in a flat stack.

As a prior art for manufacturing an electrode laminate having such a laminated structure, there is a lamination device described in Patent Document 1. In the technique of the same document, the strip-shaped "bagged positive electrode 20" and "negative electrode 30" are alternately laminated on the "lamination table 141" to form the "power generation element 15". Then, a "height adjusting portion 142" is provided on the "laminated table 141". This is to maintain the height of the uppermost surface of the laminated body substantially constant according to the progress of the lamination ([0029], etc. of the same document).

Japanese Unexamined Patent Publication No. 2012-221715

However, the above-mentioned conventional technique has the following problems. In the technique of the same document, the "bagged positive electrode 20" and the "negative electrode 30" are alternately laminated on the "lamination table 141" from the respective "supply table" by the "adsorption hand". Therefore, the productivity of lamination is inferior. For productivity, it is advantageous to continuously supply a pair of strips in which the positive electrode and the negative electrode are paired in advance on the pedestal. For that purpose, it is conceivable to press the laminate laminated on the pedestal while rolling the roll. However, since the roll reciprocates while rolling on the laminate, it may not be possible to immediately accept a new pair of strips depending on the position of the roll.

The present invention has been made to solve the problems of the above-mentioned conventional techniques. That is, the problem is to provide a laminated battery manufacturing apparatus capable of efficiently manufacturing a laminated battery while using an electrode foil pair strip in which positive and negative electrode foil strips are laminated one by one.

The laminated battery manufacturing apparatus according to one aspect of the present invention is an apparatus for producing a laminated battery having a structure in which the first electrode foil strips and the second electrode foil strips are alternately laminated, and the first electrode foil strips and the second electrode foil strips are second. An electrode foil pair supply unit in which electrode foil pair strips in which electrode foil strips are laminated one by one is advanced and supplied in the in-plane direction, and a pedestal located at the destination of the electrode foil pair strips by the electrode foil pair supply unit. It has a press roll that presses the electrode foil pair strips on the pedestal toward the pedestal and a height adjustment mechanism that adjusts the height of the pedestal, and the press roll is on the pedestal or already on the pedestal. Allows the supply of new electrode foil pair strips by the electrode foil pair supply unit on the electrode foil pair strips laminated in the above, and allows the supply of new electrode foil pair strips in the non-pressed state without pressing. Instead of pressing, the electrode foil pair strips are pressed, and when a new electrode foil pair strip is supplied, the electrode foil pair strips move in the feeding direction in the non-pressed state, and a new electrode foil pair strip is supplied. After that, it rides on a new electrode foil pair strip, enters a pressed state, and moves in the direction opposite to the feed direction . The height adjustment mechanism is provided every time a new electrode foil pair strip is supplied. The electrode foil pair is configured to descend by the thickness of the strip.

In the laminated battery manufacturing apparatus according to the above embodiment, when the electrode foil pair strips advance onto the pedestal from the electrode foil pair supply unit, the electrode foil pair strips are received on the pedestal by keeping the press roll in a non-pressed state. Can be done. When the press roll is pressed and the electrode foil pair strips are pressed against the pedestal, the laminated electrode foil pair strips are crimped to each other, and the pedestal is made of the thickness of the electrode foil pair strips by the height adjustment mechanism. It descends by a minute. This makes it possible to accept new electrode foil pair strips.

According to this configuration, there is provided a laminated battery manufacturing apparatus capable of efficiently manufacturing a laminated battery while using an electrode foil pair strip in which positive and negative electrode foil strips are laminated one by one.

It is a schematic diagram which shows the structure of the laminated battery manufacturing apparatus which concerns on embodiment. It is a schematic diagram explaining the relationship between the cutting by the negative electrode cloth cutting mechanism and the press by a press roll. It is sectional drawing which shows the structure of the height adjustment mechanism of a pedestal in a laminated battery manufacturing apparatus. It is sectional drawing which shows the shape of the press roll in the laminated battery manufacturing apparatus. It is a front view explaining the drive mechanism of a press roll in a laminated battery manufacturing apparatus. It is a back view explaining the drive mechanism of a press roll in a laminated battery manufacturing apparatus. It is a perspective view which shows another example of the drive mechanism of a press roll in a laminated battery manufacturing apparatus.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the accompanying drawings. This embodiment embodies the present invention as the laminated battery manufacturing apparatus 1 shown in FIG. Therefore, first, the laminated battery manufacturing apparatus 1 will be described.

The laminated battery manufacturing apparatus 1 of FIG. 1 includes a positive electrode cloth supply unit 2, a negative electrode cloth supply unit 3, a positive electrode cloth cutting mechanism 4, a bonding roll 5, a negative electrode cloth cutting mechanism 6, a pedestal 7, and a press roll. Has 8 and. A positive electrode foil cloth coil 9 is attached to the positive electrode cloth supply section 2, and the positive electrode foil cloth 10 is unwound. A negative electrode foil cloth coil 11 is attached to the negative electrode cloth supply unit 3, and the negative electrode foil cloth 12 is unwound. Both the positive electrode foil cloth 10 and the negative electrode foil cloth 12 have a long foil shape and have a structure in which an electrode active material layer is formed on the surface of the current collector foil. A separator layer is also formed on the surface of the negative electrode foil cloth 12. Both the positive electrode foil cloth 10 and the negative electrode foil cloth 12 proceed in the longitudinal direction thereof toward the bonding roll 5.

The positive electrode cloth cutting mechanism 4 cuts the positive electrode foil cloth 10 in the width direction to form a card-shaped positive electrode foil strip 13. The bonding roll 5 is for bonding the negative electrode foil cloth 12 and the positive electrode foil strip 13. Therefore, the negative electrode foil cloth 12 is directly supplied to the bonded roll 5, and the positive electrode foil cloth 10 is cut into the positive electrode foil strips 13 before being supplied. The positive electrode foil strips 13 are further supplied to the bonding roll 5 at intervals in the longitudinal direction of the negative electrode foil cloth 12.

The negative electrode cloth cutting mechanism 6 cuts the negative electrode foil cloth 12 in the width direction. By this cutting, an electrode foil pair strip 14 in which the positive electrode foil strip 13 and the negative electrode foil strip 13 are laminated one by one is obtained. The pedestal 7 is for placing the obtained electrode foil pair strips 14. The press roll 8 presses a large number of electrode foil pair strips 14 laminated on the pedestal 7 in the thickness direction. A nip roll 16 for supporting the negative electrode foil cloth 12 and the positive electrode foil strip 13 is provided immediately upstream of the negative electrode cloth cutting mechanism 6.

Next, the operation of the above-mentioned laminated battery manufacturing apparatus 1 will be described. When the electrode laminate 15 is manufactured by the laminated battery manufacturing apparatus 1, the negative electrode foil cloth 12 and the positive electrode foil strip 13 are supplied to the bonded roll 5. As described above, the negative electrode foil cloth 12 is supplied from the negative electrode cloth supply unit 3 and advances in the longitudinal direction to reach the bonding roll 5. The positive electrode foil strip 13 is supplied to the bonding roll 5 by the positive electrode cloth supply unit 2 and the positive electrode cloth cutting mechanism 4. The positive electrode foil strips 13 are arranged on the negative electrode foil cloth 12 on the bonding roll 5 at intervals in the longitudinal direction.

Then, the positive electrode foil strip 13 and the negative electrode foil cloth 12 are lightly pressed in the thickness direction by the bonding roll 5. In this state, the positive electrode foil strip 13 is lightly adhered to the negative electrode foil cloth 12. This is because the separator layer of the negative electrode foil cloth 12 has a certain degree of adhesiveness. Therefore, after that, the position of the positive electrode foil strip 13 does not easily shift with respect to the negative electrode foil cloth 12 due to vibration or the like.

The positive electrode foil strip 13 and the negative electrode foil cloth 12 on the downstream side of the bonding roll 5 are in a state in which the positive electrode foil strip 13 is arranged on the negative electrode foil cloth 12 at intervals in the longitudinal direction. The positive electrode foil strip 13 and the negative electrode foil cloth 12 in such a state move from the bonding roll 5 to the negative electrode cloth cutting mechanism 6. The negative electrode foil cloth 12 that has reached the negative electrode cloth cutting mechanism 6 is cut in the width direction. The negative electrode cloth cutting mechanism 6 cuts the negative electrode foil cloth 12 at a portion where the positive electrode foil strip 13 is not provided.

In this way, the electrode foil pair strip 14 is obtained. Since the electrode foil pair strips 14 are obtained one after another as the negative electrode foil cloth 12 progresses, a large number of electrode foil pair strips 14 are laminated on the pedestal 7. The electrode foil pair strips 14 laminated on the pedestal 7 are pressed in the thickness direction by the press roll 8. More specifically, each time a new electrode foil pair strip 14 is placed on the pedestal 7, the press roll 8 is used for pressing. As a result, the newly supplied electrode foil pair strip 14 is integrated with the electrode foil pair strip 14 that has been previously supplied and has already been laminated on the pedestal 7. Due to the adhesiveness of the separator layer described above.

When a predetermined number of electrode foil pair strips 14 are laminated on the pedestal 7 and integrated by the press roll 8 in this way, the electrode laminated body 15 is obtained. The electrode laminate 15 functions as a power generation element in the battery. The electrode laminate 15 is usually housed in a battery container together with an electrolytic solution.

Here, the relationship between the cutting by the negative electrode cloth cutting mechanism 6 and the pressing by the press roll 8 will be described in more detail with reference to FIG. FIG. 2 shows the movement of the blade 17 of the negative electrode cloth cutting mechanism 6 and the movement of the press roll 8 in chronological order. Throughout FIG. 2, the top-to-bottom orientation corresponds to the passage of time. Part A on the left half of FIG. 2 shows the movement of the blade 17. In the A part, the left-right direction corresponds to the width direction of the negative electrode foil cloth 12.

Part B on the right half of FIG. 2 shows the movement of the press roll 8. In the B portion, the left-right direction corresponds to the longitudinal direction of the negative electrode foil cloth 12, and the left direction thereof is the feed direction. In the B portion, the electrode foil pair strips 14 are laminated at a position adjacent to the downstream side in the feed direction with respect to the cutting position S by the blade 17. The electrode laminate 15 shown in part B is not a finished product, but 14 groups of electrode foil pair strips that have already been laminated by that time. On the right side (upstream side) of the uppermost portion of the electrode laminate 15 in the B portion, the newly supplied positive electrode foil strip 13 and the negative electrode foil cloth 12 are drawn so as to project.

At the uppermost part of the portion B in FIG. 2, a part of the cut electrode foil pair strip 14, the subsequent positive electrode foil strip 13, and the negative electrode foil cloth 12 is shown in a plan view. The electrode foil pair strip 14 shown here is the one at the time when the transfer and cutting to the left are completed. The position of the tip portion P1 in the feed direction coincides with the left end position L of the lower electrode laminate 15. Further, the rear end portion P2 of the cut electrode foil pair strip 14 (which is also the tip portion of the subsequent negative electrode foil cloth 12) coincides with the cutting position S. Further, in the middle of the subsequent negative electrode foil cloth 12, a portion P3 where the next cutting is to be performed (at this point, the actual cutting is not yet performed) is shown. The thick polygonal line Q in part B represents the time-dependent change in the position of the planned location P3.

The relatively upper period T1 in FIG. 2 is the period during which the positive electrode foil strip 13 and the negative electrode foil cloth 12 are conveyed in the feeding direction. In this period T1, the tip portion P1 shown at the upper part is between the cutting position S and the left end position L, and is moving to the left (part B). At this point, the rear end portion P2 has not been cut yet. Further, both the rear end portion P2 and the planned portion P3 are moving to the left together with the front end portion P1. In particular, the movement of the planned location P3 appears in the fact that the thick polygonal line Q is slanted.

In the period T1, the press roll 8 also moves to the left with the movement of the tip portion P1 (arrow C). At this time, the press roll 8 is in a state in which the pressing of the electrode laminate 15 is released. Further, looking at part A in FIG. 2, the cutting tool 17 is located outside the width direction range of the electrode foil pair strip 14 during the period T1. That is, at this time, the disconnection is not executed.

At time R1, which is the end of the period T1, the position of the press roll 8 coincides with the leftmost position L. At this time, the tip portion P1 of the negative electrode foil cloth 12 also reaches the left end position L. Of course, the rear end portion P2 also reaches the cutting position S. At this point, the tip portion P1 has not yet been separated from the rear negative electrode foil cloth 12. In other words, it is not in a free state that is not supported anywhere. Therefore, the positive electrode foil strip 13 and the negative electrode foil cloth 12 reach this position in a state of being firmly positioned. The negative electrode foil cloth 12 that has reached the left end position L is located on the pedestal 7 or on the electrode laminate 15 that has already been laminated.

Then, at this time R1, the transfer of the negative electrode foil cloth 12 is stopped. Therefore, after that, the thick polygonal line Q is vertical. Further, at this time, the leftward movement of the press roll 8 is also stopped. Not only that, the pressing of the electrode laminate 15 by the press roll 8 which has been released until now is turned on. Then, the press roll 8 moves to the right from this point onward (arrow D). Therefore, in the period T2 after the time R1, the press roll 8 rides on the newly supplied negative electrode foil cloth 12 and the positive electrode foil strip 13 and moves to the right while rolling. At this time, the newly supplied negative electrode foil cloth 12 is brought into close contact with the already laminated electrode laminate 15. Due to the pressing action of the press roll 8.

At time R2 (after time R1) shortly after entering T2 during this period, the blade 17 enters the width direction range of the electrode foil pair strip 14 in part A. That is, cutting is started. Then, at time R3, which is further after time R2, the blade 17 escapes from the width direction range of the electrode foil pair strip 14. That is, the cutting is completed. However, this does not mean that the cut electrode foil pair strip 14 is in a free state where it is not positioned. This is because, as described above, the pressing of the electrode foil pair strip 14 by the press roll 8 has already started at this time.

Then, at the time R4 after the time R3, the press roll 8 reaches the cutting position S by moving to the right. As a result, the adhesion of the new electrode foil pair strip 14 to the electrode laminate 15 is completed. Therefore, at this point, the rightward movement of the press roll 8 is stopped, and the pressing is also released. Even if the pressure is released, the latest electrode foil pair strip 14 is not in a free state. This is because it is already a part of the electrode laminate 15. This is the period T2. During the period T2 up to this point, the pedestal 7 is pushed down by the thickness of one of the electrode foil pair strips 14. This is also due to the pressing action of the press roll 8. This makes it possible to accept the next new electrode foil pair strip 14.

In the period T3 after the time R4, the press roll 8 is released from the pressing state again, and the negative electrode foil cloth 12 is conveyed in the feeding direction. This is the same as the above-mentioned period T1. After that, the rear end portion P2 and the planned portion P3 up to that point become the front end portion P1 and the rear end portion P2, and the same operation is repeated.

The pedestal 7 in the laminated battery manufacturing apparatus 1 of this embodiment will be further described with reference to FIG. Below the pedestal 7, a height adjusting mechanism 18 is provided as shown in FIG. As a result, the number of electrode foil pair strips 14 on the pedestal 7 is increased. Specifically, the height adjusting mechanism 18 is composed of a sleeve 19, a ball screw 20, a shaft 21, a rotary bearing 22, a one-way clutch 23, a holding brake 24, and a spring 25.

The sleeve 19 is a cylindrical member fixed to the lower surface of the pedestal 7. A ball screw 20 is attached to the lower end of the sleeve 19. When the pedestal 7 moves up and down, the sleeve 19 and the ball screw 20 also move up and down integrally with the pedestal 7. A shaft 21 is provided so as to penetrate the ball screw 20 and the one-way clutch 23. When the pedestal 7 moves up and down, the shaft 21 rotates about an axis by the action of the ball screw 20. For example, the shaft 21 rotates 5 ° with respect to the 0.3 mm descent of the pedestal 7. However, the shaft 21 does not move in the vertical direction.

The rotary bearing 22 is a member that holds the sleeve 19, the ball screw 20, the shaft 21, and the one-way clutch 23. The rotary bearing 22 does not move up and down or rotate, and is fixed to the laminated battery manufacturing apparatus 1. The rotary bearing 22 holds the sleeve 19 and the ball screw 20 so as to allow vertical movement. The rotary bearing 22 also holds the shaft 21 so as to allow rotation around the shaft. A spring seat 26 is formed on the rotary bearing 22. A spring 25 is sandwiched between the pedestal 7 and the spring seat 26. The spring 25 presses the pedestal 7 upward. A holding brake 24 is attached to the lower end of the rotary bearing 22.

The one-way clutch 23 is held by the rotary bearing 22 and the holding brake 24. The holding brake 24 takes a normal state in which rotation of the one-way clutch 23 is prohibited and a release state in which the one-way clutch 23 is allowed to rotate. However, in the normal state, the rotation of the one-way clutch 23 is prohibited. The one-way clutch 23 allows rotation of the shaft 21 around the axis in only one direction and prohibits it in the opposite direction. Specifically, it allows forward rotation corresponding to the downward movement of the pedestal 7 (for example, clockwise rotation when viewed from above), and reverse rotation corresponding to the upward movement of the pedestal 7 (for example, counterclockwise when viewed from above). Rotation around) is prohibited. However, the shaft 21 can rotate in the reverse direction together with the one-way clutch 23 only when the holding brake 24 is released. Only at this time, the pedestal 7 rises.

With the above configuration, the pedestal 7 can press the electrode laminate 15 by the pressing action of the press roll 8 and the elasticity of the spring 25. Further, while allowing the pedestal 7 to be lowered by accepting the new electrode foil pair strip 14, the pedestal 7 is prohibited from being raised in the normal state. However, when the electrode laminate 15 for one product is recovered from the pedestal 7, the pedestal 7 can be raised to the initial height by temporarily releasing the holding brake 24. ing.

Next, the press roll 8 will be described with reference to FIG. Although not mentioned in the explanation so far, the press roll 8 has a shape having a flat portion 27 on a part of the outer circumference as shown in FIG. Of the outer circumference of the press roll 8, a portion other than the flat portion 27 is a cylindrical surface portion 28. Although the details will be described later, when the press roll 8 moves in the direction of the arrow D in the portion B of FIG. 2, the press roll 8 rolls while the cylindrical surface portion 28 is in contact with the latest electrode foil pair strip 14. .. On the other hand, when the press roll 8 moves in the direction of the arrow C, the flat portion 27 remains facing downward. This is the above-mentioned "state in which the pressing of the electrode laminate 15 is released". The peripheral length of the cylindrical surface portion 28 of the press roll 8 is approximately the same as the length of the electrode foil pair strip 14 in the feeding direction.

Subsequently, the drive mechanism of the press roll 8 will be described with reference to FIGS. 5 and 6. As shown in FIG. 5, the shaft 29 of the press roll 8 is attached to the support plate 30. The support plate 30 is configured to reciprocate in the laminated battery manufacturing apparatus 1 in a direction parallel to the arrows C and D in the portion B in FIG. The movement of the arrows C and D of the press roll 8 described above is due to the movement of the support plate 30. Gears 31 to 33 are attached to the support plate 30. Gears 31 to 33 mesh in this order. Of these, the gear 31 is on the shaft 29 of the press roll 8 and rotates integrally with the press roll 8. Further, a fixed magnet 34 is attached to the support plate 30. The fixed magnet 34 is arranged at a position near the edge of the gear 32. A moving magnet 35 is attached near the edge of the gear 32.

When the support plate 30 is viewed from the back side, as shown in FIG. 6, the pinion gear 37 is mounted on the shaft 36 of the gear 33. A one-way clutch 38 is provided between the shaft 36 and the pinion gear 37. Further, the laminated battery manufacturing apparatus 1 is provided with a rack 39. The rack 39 is fixed in the laminated battery manufacturing apparatus 1, and has teeth on the upper side. The rack 39 and the pinion gear 37 are in mesh with each other. As a result, when the support plate 30 is moved as shown by the arrows C and D, the pinion gear 37 rotates due to the engagement with the rack 39. However, due to the action of the one-way clutch 38, the rotation of the pinion gear 37 is transmitted to the shaft 36 only when the support plate 30 moves in the direction of arrow D, and the pinion gear 37 runs idle when the support plate 30 moves in the direction of arrow C. It has become. The counterclockwise arrow attached to the pinion gear 37 in FIG. 6 indicates the rotation when the arrow D is moving, that is, the direction of rotation transmitted to the shaft 36.

Returning to FIG. 5, the arrows attached to the gears 31 to 33 indicate the movement of each gear when the arrow D of the support plate 30 is moved, that is, when the newly accepted electrode foil pair strip 14 is pressed and moved. It shows the direction of rotation. Of these, the direction of rotation of the gear 31 (press roll 8) is the press when the press roll 8 moves while pressing the electrode foil pair strip 14 (electrode laminate 15), that is, during the period T2 in part B of FIG. It matches the direction of rotation of the roll 8. That is, the press roll 8 in the period T2 does not roll due to friction with the electrode foil pair strip 14, but rotates under an active rotational drive.

The movement of the press roll 8 according to the above configuration will be described in relation to the portion B of FIG. At time R1, the press roll 8 is located at the tip portion P1 in FIG. 2, and the flat portion 27 is facing downward. At this time, the tip of the latest electrode foil pair strip 14 has already reached the tip portion P1. From this state, the movement in the direction of the arrow D is started. Therefore, the press roll 8 moves on the surface of the latest electrode foil pair strip 14 while rotating, that is, with the cylindrical surface portion 28 other than the flat portion 27 facing downward (period T2). As a result, the electrode laminate 15 including the latest electrode foil pair strip 14 is pressed. Further, the pedestal 7 is lowered by the thickness of one electrode foil pair strip 14.

Then, when the press roll 8 reaches the rear end portion P2 in FIG. 2 (time R4), the flat portion 27 of the press roll 8 turns downward again. At this time, a gap is formed between the press roll 8 and the surface of the top electrode foil pair strip 14 due to the dent of the flat portion 27. However, as described above, the ascent of the pedestal 7 is prohibited by the one-way clutch 23 and the holding brake 24. Therefore, the gap is not filled by the rise of the pedestal 7. The next new electrode foil pair strip 14 enters this gap. Therefore, there is no problem in accepting the new electrode foil pair strip 14 on the electrode laminate 15. If the flat portion 27 is not formed on the press roll 8, the press roll 8 becomes an obstacle to the entry of the new electrode foil pair strip 14. In this embodiment, the flat portion 27 allows the electrode foil pair strip 14 to be accepted.

After that, with the acceptance of the new electrode foil pair strip 14, the press roll 8 moves in the direction of arrow C (periods T3 and T1). During this period, the press roll 8 moves without rotating due to the action of the one-way clutch 38. That is, the flat portion 27 is moved with the flat portion 27 facing downward. When the press roll 8 reaches the tip portion P1 due to this movement, the tip of the newly accepted electrode foil pair strip 14 also reaches the tip portion P1. If the direction of movement of the press roll 8 is switched to the direction of arrow D again, the above operation is repeated.

Here, the relationship between the diameters of the press roll 8 and each gear will be described. It is desirable that no slip occurs between the press roll 8 and the surface of the top electrode foil pair strip 14 when the arrow D is moved. For that purpose, the rotation speed of the press roll 8 driven by the pinion gear 37 needs to be the same as the rotation speed when simply rolling on the surface of the electrode foil pair strip 14. This can be appropriately realized by setting the gear ratio between each gear, but can also be realized by satisfying the following two conditions, for example.
Condition 1. Pitch diameter of pinion gear 37 = Outer diameter condition of cylindrical surface 28 of press roll 8. Pitch diameter of gear 33 = Pitch diameter of gear 31

Since the moving speeds of the pinion gear 37 and the press roll 8 are mechanically the same, the rotational speed and the peripheral speed of the pinion gear 37 and the press roll 8 are the same under the above conditions. As a result, the press roll 8 can move on the surface of the electrode foil pair strip 14 without slipping.

Next, the roles of the fixed magnet 34 and the moving magnet 35 will be described. The moving magnet 35 is on the gear 32, and its relative position with respect to the fixed magnet 34 changes with the rotation of the gear 32, that is, with the rotation of the press roll 8. As shown in FIG. 5, when the flat portion 27 of the press roll 8 faces downward, one of the moving magnets 35 faces the fixed magnet 34. The fixed magnet 34 and the moving magnet 35 are oriented so as to attract each other. Therefore, in the state of FIG. 5, the fixed magnet 34 and the moving magnet 35 act to suppress the rotation of the gear 32, that is, the rotation of the press roll 8. Therefore, the posture of the press roll 8 when the arrow C is moved is stable without shaking.

This relationship between the orientation of the flat portion 27 and the position of the moving magnet 35 must be realized each time even if the movements of the arrows C and D are repeated. For that purpose, for example, it is an idea to set the gear ratio between the gear 31 and the gear 32 to 1: 1 and limit the number of moving magnets 35 to only one. However, in FIG. 5, it is not so and the setting is different. That is, the number of teeth of the gear 32 is 1.5 times the number of teeth of the gear 31, and three moving magnets 35 are provided at equal intervals. In this setting, one moving magnet 35 passes in the vicinity of the fixed magnet 34 while the arrow D is moving, and the next moving magnet 35 that has been placed is located in the vicinity of the fixed magnet 34 next time. Of course, other settings may be used.

Next, the degree of magnetic force between the fixed magnet 34 and the moving magnet 35 will be described. This magnetic force may not be too weak or too strong. If the magnetic force is too weak, it may not be possible to prevent the posture of the press roll 8 from being shaken when the arrow C is moved. Therefore, the magnetic force needs to be strong enough to overcome the drag torque due to idling when the one-way clutch 38 rotates in the reverse direction. On the other hand, if the magnetic force is too strong, the rotation of the press roll 8 may be hindered when the arrow D moves. Therefore, the magnetic force must not be strong enough to overcome the transmission torque of the one-way clutch 38 during normal rotation.

The configuration of the rotary drive transmission system from the pinion gear 37 to the press roll 8 does not have to be the one shown in FIGS. 5 and 6. For example, it may be as shown in FIG. In the configuration example of FIG. 7, the rotation shafts of the pinion gear 37 and the intermediate gear 41 are arranged in the direction perpendicular to the shaft 29 of the press roll 8. In this respect, the rotation axes of the pinion gears 37 and the gears 32 in FIGS. 5 and 6 are different from those parallel to the axis 29 of the press roll 8. With the configuration as shown in FIG. 7, there is an advantage that the drive system components such as gears can be easily arranged so as to avoid above the loading position of the electrode laminate 15.

As described in detail above, according to the present embodiment, the press roll 8 for pressing the electrode foil pair strips 14 on the pedestal 7 has a flat portion 27. This makes it possible to take a pressed state and a non-pressed state. Further, below the pedestal 7, a ball screw 20 that converts the height movement of the pedestal 7 into a rotational movement of the shaft 21 and a one-way clutch 23 that allows the pedestal 7 to descend and not to rise are provided. As a result, each time a new electrode foil pair strip 14 is supplied, the pedestal 7 is lowered by the thickness thereof. Further, by providing the holding brake 24 that temporarily allows the pedestal to rise, the height of the pedestal 7 can be restored after collecting the electrode laminate 15 for one product. In this way, a laminated battery manufacturing apparatus capable of efficiently manufacturing a laminated battery while using the electrode foil pair strips 14 in which positive and negative electrode foil strips are laminated one by one has been realized.

It should be noted that the present embodiment is merely an example and does not limit the present invention in any way. Therefore, as a matter of course, the present invention can be improved and modified in various ways without departing from the gist thereof. For example, in this embodiment, the unidirectional rotation of the press roll 8 is realized by the drive from the pinion gear 37 and the one-way clutch 38. However, the present invention is not limited to this, and the press roll 8 may be provided with a drive motor and the drive motor may be controlled. Similarly, the prohibition of ascending of the pedestal 7 at normal times and the temporary ascending permission after product collection can be replaced by the realization of numerical control of other motors by the one-way clutch 23 or the like.

Further, the drive system of the press roll 8 shown in FIGS. 5 and 6 may be deformed in various ways other than that shown in FIG. 7. First, the total number of shafts from the pinion gear 37 to the press roll 8 does not necessarily have to be "3". It is also possible to configure with only one axis. In any case, the one-way clutch 38 is interposed between the pinion gear 37 and the press roll 8, and the moving magnet 35 is provided somewhere on the press roll 8 side of the one-way clutch 38. Just do it.

Further, in the present embodiment, the non-pressed state of the press roll 8 is realized by the flat portion 27. However, the present invention is not limited to this, and a non-pressing state may be realized by using a press roll having no flat portion 27 and instead manipulating the position of the press roll in the height direction. In that case, the fixed magnet 34 and the moving magnet 35 are unnecessary. Further, the rotation of the press roll may be a simple rolling rotation.

[Preliminary claims]
It is a laminated battery manufacturing apparatus that manufactures a laminated battery having a structure in which first electrode foil strips and second electrode foil strips are alternately laminated.
An electrode foil pair supply unit that supplies an electrode foil pair strip in which the first electrode foil strip and the second electrode foil strip are laminated one by one in an in-plane direction.
A pedestal located at the destination of the electrode foil pair strip by the electrode foil pair supply unit, and
A press member that presses the electrode foil pair strips on the pedestal toward the pedestal, and
It has a height adjustment mechanism that adjusts the height of the pedestal.
The height adjustment mechanism is
A movement conversion member that converts the height movement of the pedestal into rotational movement, and
A one-way permitting mechanism that allows the rotation of the movement conversion member in the downward direction and not in the upward direction of the pedestal.
A laminated battery manufacturing apparatus having a temporary permissible mechanism that temporarily allows the pedestal to rise regardless of the one-way permissible mechanism.

In the above-mentioned laminated battery manufacturing apparatus, when the electrode foil pair strips are received on the pedestal from the electrode foil pair supply unit, the electrode foil pair strips are pressed by the press member. At this time, the pedestal is lowered by the thickness of the electrode foil pair strip, but the pedestal is prohibited from being raised after the pressing is completed by the one-way allowable mechanism. Therefore, it is possible to accept the subsequent electrode foil pair strips on the pedestal. After the laminated electrode foil pair strip for one product is pressed and the product is collected from the pedestal, the temporary allowance mechanism allows the pedestal to rise to its original height.

1 Laminated battery manufacturing equipment 2 Positive electrode cloth supply unit 3 Negative electrode cloth supply unit 4 Positive electrode cloth cutting mechanism 5 Laminating roll 6 Negative electrode cloth cutting mechanism 7 Pedestal 8 Press roll 12 Negative electrode foil cloth 13 Positive electrode foil strip 14 Electrode foil pair strip 15 Electrode lamination Body 18 Height adjustment mechanism 20 Ball screw 21 Shaft 23 One-way clutch 24 Holding brake 25 Spring 27 Flat part

Claims (1)

It is a laminated battery manufacturing apparatus that manufactures a laminated battery having a structure in which first electrode foil strips and second electrode foil strips are alternately laminated.
An electrode foil pair supply unit that supplies an electrode foil pair strip in which the first electrode foil strip and the second electrode foil strip are laminated one by one in an in-plane direction.
A pedestal located at the destination of the electrode foil pair strip by the electrode foil pair supply unit, and
A press roll that presses the electrode foil pair strips on the pedestal toward the pedestal, and
It has a height adjustment mechanism that adjusts the height of the pedestal.
The press roll
Allows the electrode foil pair supply unit to supply a new electrode foil pair strip onto the pedestal or onto the electrode foil pair strip already laminated on the pedestal, and does not press. Unpressed state and
The supply of new electrode foil pair strips is not allowed, and the press state is taken while pressing .
When a new electrode foil pair strip is supplied, it moves in the feeding direction of the electrode foil pair strip in the non-pressed state.
After receiving the supply of the new electrode foil pair strips, the pair rides on the new electrode foil pair strips, enters the pressed state, and moves in the direction opposite to the feeding direction .
The height adjusting mechanism is configured to be lowered by the thickness of the electrode foil pair strips each time a new electrode foil pair strip is supplied. apparatus.

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