JP6268013B2 - Electrode terminal shape correcting device and electrode terminal shape correcting method - Google Patents

Description

  The present invention relates to an electrode terminal shape correcting device and an electrode terminal shape correcting method.

A plate-shaped secondary battery having an electrode terminal drawn out from a flat case is known. For example, Patent Document 1 and Patent Document 2 include a plurality of chuck members made of a pair of rectangular metal plates. There is disclosed a charge / discharge test apparatus in which a plurality of thin secondary battery electrode terminals are sandwiched to perform a charge / discharge test of a plurality of secondary batteries simultaneously.

JP 2012-22847 A JP 2012-3959 A

  By the way, in the conventional charge / discharge test apparatus as disclosed in Patent Document 1 and Patent Document 2, sufficient consideration is given to a case where deformation such as bending occurs in the electrode terminal of the secondary battery before the charge / discharge test. Not done.

  Therefore, if the secondary battery electrode terminal is bent or deformed for some reason before the charge / discharge test, the chuck is held when the secondary battery electrode terminal is held by the chuck member of the charge / discharge test device. The contact of the electrode terminal with the member is not sufficient as compared with an intended contact state, and there is a possibility that the charge / discharge test may be hindered.

  That is, when manufacturing the secondary battery, it is necessary to manufacture the electrode terminal while appropriately correcting the deformation of the electrode terminal so that the electrode terminal is not deformed with respect to the intended shape.

  The electrode terminal shape correcting device of the present invention can sandwich the electrode terminal of the secondary battery housed in the battery housing body, and a pair of rectangular shapes formed such that the distance between the distal ends on the battery housing body side increases. A plurality of chuck members made of a metal plate, and a pair of opposing clamping members that are attached to an end of the metal plate and that can sandwich the electrode terminal, and close the tip side of the chuck member A first operation of clamping the electrode terminal by the pair of clamping members, and a second operation of gradually changing the contact between the electrode terminal and the clamping member toward the distal end side of the electrode terminal after the first operation; The shape of the electrode terminal is corrected by repeating a shape correcting operation for performing a third operation of opening the tip end side of the chuck member and releasing the electrode terminal after the second operation a plurality of times.

  Moreover, the electrode terminal shape correction method of the present invention can sandwich the electrode terminal of the secondary battery housed in the battery housing, and a pair of gaps formed so that the distance between the tip ends on the battery housing side increases. A plurality of chuck members made of a rectangular metal plate and a pair of opposing clamping members attached to the end portion on the tip side of the metal plate and capable of sandwiching the electrode terminal, the tip side of the chuck member is A first operation for closing and clamping the electrode terminal by the pair of clamping members; and a second operation for gradually changing the contact point between the electrode terminal and the clamping member to the tip side of the electrode terminal after the first operation. The shape of the electrode terminal is corrected by repeating a shape correction operation of performing a third operation of opening the tip end side of the chuck member and releasing the electrode terminal after the second operation a plurality of times. That.

  According to the present invention, when the electrode terminal is bent with respect to the intended shape, the bending of the electrode terminal can be corrected.

The perspective view of a secondary battery. The perspective view of the magazine in which the some secondary battery was accommodated. Explanatory drawing which showed typically the process of correcting the shape of an electrode terminal. Explanatory drawing which showed typically the process of correcting the shape of an electrode terminal. The perspective view of the electrode terminal shape correction apparatus which concerns on this invention. The perspective view of the electrode terminal shape correction apparatus which concerns on this invention. The expanded perspective view of the principal part of the electrode terminal shape correction apparatus which concerns on this invention. It is explanatory drawing which showed typically the 2nd operation | movement of a shape correction operation | movement, Comprising: (A) is at the time of 2nd operation start, (B) is in 2nd operation, (C) is the state at the time of 2nd operation completion. Show. It is explanatory drawing which showed typically the 2nd operation | movement of the shape correction operation | movement in the other Example from which the shape of a clamping member differs, Comprising: (A) is at the time of 2nd operation | movement at the time of 2nd operation | movement, (B). C) shows the state at the end of the second operation. It is explanatory drawing which showed typically the 2nd operation | movement of the shape correction operation | movement in the other Example from which the shape of a clamping member differs, Comprising: (A) is at the time of 2nd operation | movement at the time of 2nd operation | movement, (B). C) shows the state at the end of the second operation. The perspective view of the clamping member in another Example.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory view schematically showing an example of the secondary battery 1. The thin secondary battery 1 is, for example, a flat lithium ion secondary battery sealed with an exterior film, has a flat rectangular appearance, and has a pair of electrode terminals 2a at one end in the longitudinal direction. 2b.

  FIG. 2 shows a magazine 11 as a battery housing body in which a plurality of secondary batteries 1 are housed. The shape correction of the electrode terminal 2 of the secondary battery 1 is performed for each magazine 11.

  The magazine 11 includes a rectangular plate-shaped base 12, a pair of side plates 13, 14 installed on the left and right on the base 12, and a storage chamber (between the side plates 13, 14 for storing the secondary battery 1 ( A plurality of partition walls 16 that form a plurality of partitions between the side plate 13 and the battery pressing plate 15, the battery pressing plate 15 disposed on the side plate 14 side, and the partition 16 and the battery pressing plate 15. And four guide stays 17 extending between the four corners of the side plates 13 and 14 through the four corners. The partition wall 16 and the battery pressing plate 15 are movable along the guide stay 17.

  The battery pressing plate 15 has one end of one adjustment screw 18 inserted through the side plate 14 screwed into a screwing portion (not shown) formed on the side surface. When the adjustment screw 18 is loosened, each partition wall 16 can move along the guide stay 17 between the side plate 13 and the battery pressing plate 15, and after the secondary battery 1 is accommodated one by one in each accommodation chamber, the adjustment screw When 18 is tightened, the battery pressing plate 15 presses and fixes each partition wall 16 so that the battery accommodation width L of the magazine 11 is determined according to the number of partition walls 16.

  The secondary battery 1 is stored in the magazine 11 and the shape of the electrode terminal 2 is corrected by the electrode terminal shape correcting device 21 of the present invention, which will be described later, in a pre-shipment process such as a process before the charge / discharge test is performed. Is implemented.

  As shown in FIG. 3, the magazine 11 is conveyed by the conveyor 22 to the front of the electrode terminal shape correcting device 21. The magazine 11 transported to the front of the electrode terminal shape correcting device 21 is raised to the front position of the electrode terminal shape correcting device 21 by the lifter 23 as shown in FIG. When the magazine 11 rises to the front position of the electrode terminal shape correcting device 21, the electrode terminal shape correcting device 21 moves forward from the standby position to the shape correction start position toward the magazine 11 by the slide mechanism 24 using an electric motor. Then, an air cylinder 36, which will be described later, is driven at the shape correction start position to grip the electrode terminal 2 of the secondary battery 1 housed in the magazine 11, and the shape correction operation, which will be described later, is repeated a plurality of times. Correct the shape of 2. When the shape correction of the electrode terminal 2 by the shape correction operation is completed, the electrode terminal shape correction device 21 is retracted from the shape correction start position to the standby position by the slide mechanism 24, and the magazine 11 is lowered by the lifter 23 and the conveyor 22. Is carried out from the front of the electrode terminal shape correction device 21 to the next step (for example, a charge / discharge test step of the secondary battery).

  5 to 7 are explanatory views schematically showing the electrode terminal shape correction device 21, FIG. 5 is a perspective view seen from the front side, FIG. 6 is a perspective view seen from the back side, and FIG. 3 is an enlarged perspective view of a main part of the terminal shape correcting device 21. FIG. For convenience of explanation, in FIGS. 5 to 7, the front-rear direction of the electrode terminal shape correcting device 21 is the X-axis direction, the left-right direction of the electrode terminal shape correcting device 21 is the Y-axis direction, and the height of the electrode terminal shape correcting device 21. The direction is defined as the Z-axis direction.

  The electrode terminal shape correcting device 21 includes a support base 31, a double-acting air cylinder 36, a roller holding member 37 as a chuck drive unit attached to the support base 31 so as to be movable back and forth, and a chuck operating unit. The chuck holding member 41 is generally constituted.

  The support base 31 is a rectangular parallelepiped frame composed of 16 support columns 31a to 31p arranged in the front, rear, left, right, and up and down directions, on the three support columns 31i to 31k located on the same plane. A support plate 33 that covers the rear side from the center in the front-rear direction (X-axis direction) of the base 31 is fixed.

  The air cylinder 36 has a piston rod (not shown) that expands and contracts in the front-rear direction (X-axis direction) of the support base 31, and is attached to the center on the support plate 33.

  A cylindrical guide member 43 is inserted into the casing 36a of the air cylinder 36 on the left and right sides of the piston rod. A thick plate-like connecting member 45 is attached to both guide members 43, 43 and the tip of the piston rod.

  A long, substantially U-shaped support bracket 47 that supports the roller holding member 37 is attached to the connecting member 45 in the left-right direction (Y-axis direction) of the support base 31. The left and right flanges 49, 49 of the support bracket 47 are bent in an L shape in front of the support base 31.

  The two upper and lower shafts 51, 53 spanned between the left and right flanges 49, 49 in the left-right direction (Y-axis direction) of the support base 31 hold a plurality of divided rollers, which are components of the roller holding member 37. The member 55 is attached in parallel in the left-right direction (Y-axis direction) of the support base 31.

  As shown in FIG. 7, the divided roller holding member 55 is arranged in the vertical direction (Z-axis direction) of the two upper and lower rectangular parallelepiped block members 63 and 65 and the support base 31 connecting the block members 63 and 65. The connecting plate 67 extending along one side and the whole connecting member 68 attached to both block members 63 and 65 are roughly constituted by a substantially U-shaped connecting member 68.

  A shaft insertion hole 69 is formed in the block member 63 so that the shaft 51 is inserted in the left-right direction (Y-axis direction) of the support base 31. The block member 65 is provided with a shaft insertion hole 71 so that the shaft 53 is inserted in the left-right direction (Y-axis direction) of the support base 31. On both side surfaces of both block members 63 and 65, cylindrical spacers 73 with shaft insertion holes 69 and 71 opened are projected.

  The connecting member 68 includes arm portions 75, 75 extending along the front-rear direction (X-axis direction) of the pair of upper and lower support bases 31 whose one ends are screwed to the front surfaces of the block members 63, 65, and both arm portions 75, And a roller mounting portion 81 extending along the vertical direction (Z-axis direction) of the support base 31 connected to the other end of 75. The roller mounting portion 81 is formed with rectangular openings 77 and 79, and is disposed to face the connecting plate 67. Both arm portions 75, 75 are orthogonal to the roller mounting portion 81.

  A pair of roller mounting brackets 83 and 85 are mounted on the roller mounting portion 81 above and below the openings 77 and 79, respectively. An even number of roller mounting holes 87 are provided at equal intervals on the tip side of each of the roller mounting brackets 83 and 85. A plurality of pairs (four pairs each in the vertical direction in this embodiment) of rollers 89 are rotatably mounted in the roller mounting holes 87 between the upper and lower roller mounting brackets 83 and 85, respectively.

  The divided roller holding member 55 is configured as described above. In this embodiment, eight divided roller holding members 55 are attached in parallel to the two shafts 51 and 53 via the spacer 73, and the support bracket 47. It is supported by. Further, one connection bracket 93 having an L-shaped cross section is attached to each of the outer circumferences of the left and right flanges 49.

  A plurality of divided chuck holding members 57 that are components of the chuck holding member 41 are provided on the upper and lower two shafts 59 and 61 arranged along the left and right direction (Y-axis direction) of the support base 31. Are attached in parallel in the left-right direction (Y-axis direction).

  One connection bracket 107 having an L-shaped cross section is attached to each end of the two shafts 59 and 61.

  The connection bracket 107 and the connection bracket 93 are held so as to be movable in the front-rear direction (X-axis direction) of the support base 31 by sliding on the guide members 109 attached to the left and right of the support base 31. . One guide member 109 is supported by a plate 111 attached between the support columns 31g, 31l, and 31i of the support base 31, and the other guide member 109 is attached between the support columns 31h, 31j, and 31m of the support base 31. The plate 113 is supported. Further, the connecting bracket 107 is formed with two shaft insertion holes 115 that extend in the front-rear direction (X-axis direction) of the support base 31 and are aligned vertically. The ends of the two shafts 117 and 117 attached to the connecting bracket 93 in parallel to each other are inserted into the shaft insertion holes 115. Coil springs 39 are wound around the shafts 117 and 117, respectively.

  The divided chuck holding member 57 is paired with the divided roller holding member 55 as a unit. That is, the roller holding member 37 and the chuck holding member 41 constitute one chuck unit as a whole.

  Such a divided chuck holding member 57 includes a thick plate-like chuck mounting member 95 disposed between the arm portions 75 and 75 along the roller mounting portion 81, and upper and lower sides of the front surface of the chuck mounting member 95. A plurality of chuck members 101 arranged in parallel corresponding to each pair of rollers 89 (four in the upper and lower portions in this embodiment) are roughly constituted.

  Shaft insertion holes 97 and 99 are formed in the chuck attachment member 95 so that the shafts 59 and 61 are inserted in the left-right direction (Y-axis direction) of the support base 31.

  As an example, the chuck member 101 includes a pair of strip-shaped metal plates 103 and 105 having a relatively hard spring property such as beryllium copper. The rear end sides of the two metal plates 103 and 105 overlap each other and pass through a through hole (not shown) formed in the chuck attachment member 95. The rear ends of the metal plates 103 and 105 protruding from the back surface of the chuck mounting member 95 are bent in an L shape along the back surface of the chuck mounting member 95 and screwed to the back surface.

  A pair of rollers 89, 89 are arranged corresponding to each chuck member 101 (metal plates 103, 105) protruding to the front side of the chuck mounting member 95, and each pair of rollers 89, 89 has a pair of rollers 89, 89. Metal plates 103 and 105 are inserted.

  The pair of metal plates 103 and 105 inserted between the pair of rollers 89 and 89 have their distal end sides (103a and 105a) expanded in a substantially V shape in a plan view, and the distal end portions (103b and 105b) are slightly opened. It is bent inward and generally formed so that the distance between the pair of metal plates 103 and 105 increases toward the distal end side. In addition, since the maximum deformation amount of the electrode terminal 2 that may occur at the time of manufacturing the secondary battery 1 is known from past results, the interval between the tip portions (103b, 105b) of the metal plates 103, 105 is The electrode terminal 2 is set so that it can be inserted even when the maximum deformation amount.

  Metal clamping members 108 and 108 are attached to the tip portions (103b and 105b) of the pair of metal plates 103 and 105, respectively. That is, a pair of opposing clamping members 108 and 108 capable of clamping the electrode terminal 2 of the secondary battery 1 are attached to the tip portions (103b and 105b) of the chuck member 101.

  The clamping member 108 includes a leg portion 108a that is caulked and fixed to a mounting hole (not shown) penetrating the tip portion 103b of the metal plate 103 or the tip portion 105b of the metal plate 105, and a flat surface integrally formed with the leg portion 108a. And a thick head 108b having a rectangular plate shape.

  In the head 108b of the clamping member 108 in this embodiment, a clamping surface 108c (see FIG. 8) capable of clamping the electrode terminal 2 of the secondary battery 1 extends from the distal end side to the proximal end side of the chuck member 101 (X Along the axial direction), it is formed in an arc shape that is convex toward the opposing electrode terminal 2 side (opposing clamping member 108 side).

  The divided chuck holding member 57 is configured as described above. In this embodiment, eight divided chuck holding members 57 are attached in parallel to the two shafts 59 and 61 to form the chuck holding member 41. Has been.

  As shown in FIGS. 5 and 6, when the piston rod of the air cylinder 36 is retracted rearward, the chuck holding member 41 is spaced apart from the roller holding member 37 by the spring force of the coil spring 39.

  When the air cylinder 36 is driven and the piston rod extends forward, both the roller holding member 37 and the chuck holding member 41 move forward, but the connection bracket 107 attached to the left and right outer peripheries of the chuck holding member 41 supports the support base. When the left and right columns 31l and 31m of the base 31 are reached, the connecting bracket 107 comes into contact with both columns 31l and 31m, and the forward movement of the chuck holding member 41 is restricted.

  In addition, as shown in FIG. 5, a single support 31p is also bridged in the vertical direction (Z-axis direction) of the support base 31 in the center between the support bases 31a and 31b of the support base 31. In this manner, the left and right connecting brackets 107 come into contact with the columns 31l and 31m, and at the same time, the shafts 59 and 61 come into contact with the column 31p so that the forward movement of the chuck holding member 41 is restricted.

  Thus, when the forward movement of the chuck holding member 41 is restricted, the chuck member 101 protrudes forward of the support base 31.

  Even if the forward movement of the chuck holding member 41 is restricted, there is no hindrance to the driving of the air cylinder 36, and the piston rod further extends, so that it resists the spring force of the left and right coil springs 39. The roller holding member 37 further moves forward, and accordingly, each pair of rollers 89 moves forward, and a pair of metal plates 103 and 105 of each chuck member 101 that expands in a substantially V shape in plan view. Are closed, and the electrode terminals 2 of the secondary battery 1 can be clamped by the pair of clamping members 108 and 108 attached to the tip portions (103b and 105b) of the pair of metal plates 103 and 105, respectively.

  Here, the support base of the roller holding member 37 when the electrode terminal 2 of the secondary battery 1 that has not been clamped by the pair of clamping members 108 and 108 until now is clamped by the forward movement of the roller holding member 37. A position along the front-rear direction (X-axis direction) of the table 31 is defined as a clamping start position (FIG. 8A).

  In this embodiment, the rollers 89 and 89 are brought into contact with each other by moving the roller holding member 37 further forward than the nipping start position. Therefore, the pair of metal plates 103 and 105 are elastically deformed, and FIG. As shown in FIG. 8C, the contact between the heads 108b, 108b of the pair of sandwiching members 108, 108 and the electrode terminal 2 of the secondary battery 1 is connected to the tip side of the electrode terminal 2 (electrode terminal shape correction device). 21 side). The hardness of the pair of metal plates 103 and 105 constituting the chuck member 101, the V-shaped widening angle of the tip side (103a, 105a), the degree of warping of this position, and the tip part (103a, 105a) following the tip side (103a, 105a) When the roller holding member 37 is advanced from the clamping start position by appropriately setting the shape such as the angle formed with respect to the tip side (103a, 105a) of 103b, 105b), as shown in FIG. The contacts between the heads 108b, 108b of the pair of sandwiching members 108, 108 and the electrode terminal 2 of the secondary battery 1 are gradually moved to the tip side of the electrode terminal 2 (electrode terminal shape correction device 21 side). Is possible.

  Accordingly, the chuck member is moved by the movement of the pair of rollers 89 and 89 toward the front end portion (103b, 105b) of the pair of rollers 89 and 89 accompanying the forward movement of the roller holding member 37 after the forward movement of the chuck holding member 41 is restricted. The first operation of closing the tip end side of 101 and holding the electrode terminal 2 by the pair of holding members 108 and 108, and the roller holding from the state in which the electrode terminal 2 is held by the pair of holding members 108 and 108 after the first operation A second operation for gradually moving the contact between the pair of sandwiching members 108 and 108 and the electrode terminal 2 toward the distal end side (electrode terminal shape correcting device 21 side) of the electrode terminal 2 by further moving the member 37 forward; After the second operation, the shape correction operation is performed a plurality of times (for example, 5 times), in which the roller holding member 37 is retracted to release the electrode terminal 2 that opens the front end side of the chuck member 101. ) Repeat.

  Specifically, the shape correction operation is performed a plurality of times at each position while sequentially changing the position from the proximal end side to the distal end side of the electrode terminal 2. For example, when the shape of the electrode terminal 2 is corrected by the shape correction operation at five locations along the longitudinal direction (X-axis direction) of the support base 31, the first shape correction operation is relatively the most proximal end of the electrode terminal 2. The shape correction operation is performed by gradually moving to the distal end side of the electrode terminal 2 after that, and the fifth shape correction operation is relatively performed on the most distal end side of the electrode terminal 2.

  In the third operation, until the roller holding member 37 returns to the clamping start position, the contact between the pair of clamping members 108 and 108 and the electrode terminal 2 of the secondary battery 1 is from the front end side of the electrode terminal 2. When the roller holding member 37 is gradually changed to the proximal end side and the roller holding member 37 is retracted from the holding start position, the holding of the electrode terminal 2 by the pair of holding members 108 and 108 is finished. That is, the third operation is a movement in the opposite direction of the first and second operations.

  In this way, the impact when the electrode terminal 2 of the secondary battery 1 is clamped by the pair of clamping members 108 and 108 and the contact between the pair of clamping members 108 and 108 and the electrode terminal 2 of the secondary battery 1 after clamping. Changing the manner in which the electrode terminal 2 of the secondary battery 1 is clamped by the pair of clamping members 108 and 108 so that the electrode terminal 2 is gradually moved toward the tip side of the electrode terminal 2 (electrode terminal shape correction device 21 side). When the electrode terminal 2 of the secondary battery 1 is deformed with respect to the intended shape by repeating the shape correction operation to be performed a plurality of times, the shape of the electrode terminal 2 becomes the intended shape. Can be corrected with high accuracy.

  That is, when the electrode terminal 2 is bent with respect to the intended shape, the bending of the electrode terminal 2 can be accurately corrected by performing the shape correction operation a plurality of times. In particular, if the shape correction operation is performed a plurality of times while sequentially changing the position from the proximal end side to the distal end side of the electrode terminal 2, the shape of the electrode terminal 2 can be corrected more accurately.

  Since the head 108b of the clamping member 108 is formed in an arc shape in which the clamping surface 108c facing the electrode terminal 2 of the secondary battery 1 is convex toward the facing electrode terminal 2 side, The state in which the clamping member 108 and the electrode terminal 2 are always in contact with each other can be maintained, and the shape of the electrode terminal 2 can be corrected more effectively.

  Note that the shape of the clamping member 108 is not limited to the shape of the above-described embodiment. As shown in FIG. 9, the clamping surface 108c, which is the top of the head 108b, has an arc shape, and further, the clamping surface 108c A plurality of protrusions 108d having a triangular cross section perpendicular to the advancing / retreating direction (X-axis direction) of the roller holding member 37 and the chuck holding member 41 may be formed. Also in this case, in the second operation, the state in which the clamping member 108 and the electrode terminal 2 are always in contact with each other can be maintained, and the shape of the electrode terminal 2 can be corrected more effectively.

  Further, as shown in FIG. 10, the clamping surface 108c, which is the top of the head 108b, is planar, and the clamping surface 108c is orthogonal to the advancing / retreating direction (X-axis direction) of the roller holding member 37 and the chuck holding member 41. A plurality of protrusions 108d having a triangular cross section may be formed.

  Alternatively, as shown in FIG. 11, the clamping surface 108c, which is the top of the head 108b, may be planar, and a plurality of quadrangular pyramid-shaped protrusions 108e may be formed on the clamping surface 108c. When a plurality of quadrangular pyramid-shaped protrusions 108e are formed on the sandwiching surface 108c, the sandwiching surface 108c may be formed in an arc shape that is convex toward the opposing electrode terminal 2 side.

DESCRIPTION OF SYMBOLS 1 ... Secondary battery 2 ... Electrode terminal 11 ... Magazine 21 ... Electrode terminal shape correction apparatus 31 ... Support base 36 ... Air cylinder 37 ... Roller holding member 41 ... Chuck holding member 55 ... Divided roller holding member 57 ... Divided chuck holding member 95 ... Chuck mounting member 101 ... Chuck member 103 ... Metal plate 105 ... Metal plate 108 ... Holding member 108a ... Leg portion 108b ... Head portion 108c ... Hanging surface 108d ... Projection 108e ... Protrusion

Claims (11)

A plurality of chuck members made of a pair of rectangular metal plates that can sandwich the electrode terminals of the secondary battery housed in the battery housing body, and are formed so that the distance between the distal ends on the battery housing body side increases.
A pair of clamping members that are attached to the end of the metal plate and that can clamp the electrode terminal;
A first operation of closing the distal end side of the chuck member and clamping the electrode terminal by the pair of clamping members, and a contact point between the electrode terminal and the clamping member after the first operation are gradually brought toward the distal end side of the electrode terminal. The shape correction of the electrode terminal is corrected by repeating the shape correction operation of performing the second operation to be changed into the second operation and the third operation of opening the tip end side of the chuck member after the second operation and releasing the electrode terminal a plurality of times. An electrode terminal shape correction device characterized in that: A chuck driving unit capable of moving back and forth to a battery housing in which a secondary battery is housed;
A chuck actuating part capable of moving forward and backward to the battery container together with the chuck driving part and restricting forward movement toward the battery container prior to the chuck driving part,
The chuck driving unit has a plurality of a pair of rollers rotatably arranged in parallel on the front surface on the battery container side,
The chuck operating unit has a plurality of chuck members made of a pair of rectangular metal plates that can be inserted between the pair of rollers and sandwich the electrode terminal of the secondary battery,
The chuck member is formed so that a distance between the metal plates is increased toward a tip side that is a battery housing side, and a pair of opposing clamping members that can hold the electrode terminal at an end portion on the tip side. Have
By moving the pair of rollers toward the front end side of the chuck member by the forward movement of the chuck driving unit toward the battery housing, the front end side of the chuck member is closed and the electrode terminal is sandwiched between the pair of holding members. A second operation for gradually changing the contact between the electrode terminal and the clamping member toward the tip end side of the electrode terminal by further moving the chuck drive unit toward the battery housing, and then the chuck An electrode characterized in that the shape of the electrode terminal is corrected by repeating a shape correcting operation for performing a third operation of retreating the drive unit to open the tip end side of the chuck member and releasing the electrode terminal a plurality of times. Terminal shape correction device.   3. The electrode terminal shape correction device according to claim 1, wherein the shape correction operation is sequentially performed from the base end side to the tip end side of the electrode terminal.   The pair of clamping members are characterized in that the clamping surfaces facing each other are formed in an arc shape that protrudes from the distal end side to the proximal end side of the chuck member toward the opposing clamping surface side. The electrode terminal shape correction apparatus according to any one of claims 1 to 3.   The electrode terminal shape correction device according to any one of claims 1 to 4, wherein the pair of clamping members has a plurality of triangular protrusions formed on a clamping surface facing each other.   5. The electrode terminal shape correction device according to claim 1, wherein the pair of holding members have a plurality of quadrangular pyramid-shaped protrusions formed on the holding surfaces facing each other. A plurality of chuck members made of a pair of rectangular metal plates that can sandwich the electrode terminals of the secondary battery housed in the battery housing body, and are formed so that the distance between the distal ends on the battery housing body side increases. A pair of opposing clamping members attached to the end of the metal plate and capable of clamping the electrode terminals,
A first operation of closing the distal end side of the chuck member and clamping the electrode terminal by the pair of clamping members, and a contact point between the electrode terminal and the clamping member after the first operation are gradually brought toward the distal end side of the electrode terminal. The shape correction of the electrode terminal is corrected by repeating the shape correction operation of performing the second operation to be changed into the second operation and the third operation of opening the tip end side of the chuck member after the second operation and releasing the electrode terminal a plurality of times. An electrode terminal shape correction method comprising:   The electrode terminal shape correcting method according to claim 7, wherein the shape correcting operation is sequentially performed from the proximal end side to the distal end side of the electrode terminal.   The pair of clamping members are characterized in that the clamping surfaces facing each other are formed in an arc shape that protrudes from the distal end side to the proximal end side of the chuck member toward the opposing clamping surface side. The electrode terminal shape correction method according to claim 7 or 8.   The electrode terminal shape correcting method according to any one of claims 7 to 9, wherein the pair of clamping members are formed with a plurality of triangular protrusions on the clamping surfaces facing each other.   The electrode terminal shape correction method according to claim 7, wherein the pair of clamping members have a plurality of quadrangular pyramid-shaped protrusions formed on the clamping surfaces facing each other.

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