JP2019114451A - Pallet for electrode assembly - Google Patents

Abstract

To provide a pallet for electrode assembly capable of reducing the fear of adhesion of an extraneous material, causing short circuit, to the electrode assembly.SOLUTION: A pallet for electrode assembly includes a body part 32 for mounting an electrode assembly 19, multiple chuck mechanisms 33 for pushing the electrode assembly 19, mounted on the body part 32, against the body part 32 and fixing in place, and a non-conductive first inclusion member 34 interposed between the body part 32 and the chuck mechanism 33. The chuck mechanism 33 has a chuck part 41 placed by locating the electrode assembly 19 between the body part 32, and movable relatively thereto, and a support part 40 for supporting the chuck part 41, and connected with the body part 32, where at least a part of the first inclusion member 34 is interposed between the support part 40 and the body part 32.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a pallet for an electrode assembly for transporting the electrode assembly.

  As an example of the electrode assembly pallet, there is a pallet for transporting a laminated structure (electrode assembly) in which positive electrodes (electrodes) and negative electrodes (electrodes) are laminated in a state of being insulated from each other. The pallet includes a stage (main body) on which the laminated structure is placed, and a clamper (chuck mechanism) for gripping the laminated structure placed on the table to suppress deviation of the positive electrode and negative electrode during transportation. (For example, patent document 1).

  The clamper is inserted into a hole (a through hole) formed in a table on which the laminated structure is placed, and is movable relative to the table. That is, in the lowered state, the clamper grips the laminated structure so as to be pressed against the table, and rotates from the lowered state to release the grip of the laminated structure.

JP, 2009-206046, A

  In order to suppress the displacement of the positive electrode and the negative electrode during transportation, the laminated structure must be gripped with a sufficient force. For that purpose, the clamper and the base need to have high rigidity. For example, if the clamper and the base are made of a highly rigid metal, the sliding of the clamper and the base may cause both to wear, resulting in conductive foreign matter. When the conductive foreign matter adheres to the laminated structure, there is a possibility that the positive electrode and the negative electrode may be short-circuited in the laminated structure.

  An object of the present invention is to provide a pallet for an electrode assembly which can reduce the possibility of foreign matter causing a short circuit from adhering to the electrode assembly.

Hereinafter, the means for solving the above-mentioned subject and its operation effect are described.
A pallet for an electrode assembly to solve the above problems comprises: a main body portion on which the electrode assembly is mounted; a plurality of chucking mechanisms for pressing and fixing the electrode assembly mounted on the main body portion to the main body portion; A non-conductive intervening member interposed between the head and the chuck mechanism, the chuck mechanism being disposed with the electrode assembly positioned between the body and the main body, and the main body A chuck portion that moves relative to the support portion, and a support portion that supports the chuck portion and is connected to the main body portion; To intervene.

  According to this configuration, the nonconductive intervening member is interposed between the main body and the chuck mechanism. Therefore, even when the chuck mechanism moves relative to the main body and foreign matter is generated from the intervening member, the foreign matter is nonconductive, so that the possibility of the foreign matter causing the short circuit adhering to the electrode assembly can be reduced.

In the pallet for an electrode assembly, the chuck mechanism preferably includes a biasing member configured to bias the support portion toward the main body portion, and a covering member covering the biasing member.
According to this configuration, the biasing member that biases the support portion toward the main body portion is covered by the covering member. As a result, even when the biasing member is worn and a foreign matter is generated, the foreign matter can be retained within the covering member, and the possibility of the foreign matter adhering to the electrode assembly supported by the main body can be reduced.

  In the pallet for an electrode assembly, the support portion is inserted into and connected to the through hole formed in the main body portion, and a flange is engaged with the biasing member between the chuck portion and the main body portion. It is preferable that the flange has a size in a surface direction intersecting the moving direction in which the chuck portion moves relative to the main body portion, which is larger than the inner diameter of the through hole.

  According to this configuration, the size in the surface direction intersecting the moving direction of the flange is larger than the inner diameter of the through hole. Therefore, there is no possibility that the support portion may come out of the through hole by the flange engaged with the biasing member.

  According to the present invention, it is possible to reduce the possibility that foreign matter causing a short circuit may adhere to the electrode assembly.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the external appearance of the secondary battery of embodiment. The disassembled perspective view which shows the component of an electrode assembly. The model top view of the pallet for electrode assemblies. 4-4 arrow sectional drawing in FIG. FIG. The model top view of the pallet for electrode assemblies which fixes an electrode assembly. FIG. 5 is a schematic cross-sectional view of the chuck mechanism in a released state. FIG. 5 is a schematic cross-sectional view of a chuck mechanism in which the elastic member faces the electrode assembly. 9-9 in FIG. 6 arrow sectional drawing.

  Hereinafter, an embodiment of the electrode assembly pallet will be described with reference to the drawings. The electrode assembly pallet is used in the manufacture of a secondary battery such as a lithium ion battery. The secondary battery is mounted, for example, on a vehicle such as an EV (Electric Vehicle) or a PHV (Plug in Hybrid Vehicle), and stores power supplied to a motor serving as a prime mover.

  As shown in FIG. 1, the secondary battery 11 includes a metal case 12. The case 12 is provided with a bottomed rectangular parallelepiped container 13 whose one surface (upper surface in the present embodiment) is open, and a lid 14 which closes the opening of the container 13. The secondary battery 11 has a positive electrode terminal 15 and a negative electrode terminal 16 which penetrate the lid 14 and project out of the case 12, and an insulating ring 17 which insulates the positive electrode terminal 15 and the negative electrode terminal 16 with respect to the lid 14. Prepare.

  The case 12 contains an electrode assembly 19 and an electrolyte (not shown). The electrode assembly 19 has a rectangular parallelepiped shape as a whole, corresponding to the rectangular parallelepiped shape of the internal space of the container 13.

  As shown in FIG. 2, the electrode assembly 19 has a plurality of sheet-like electrodes. That is, the electrode assembly 19 has at least one positive electrode 20 which is an example of a sheet-like electrode, and at least one negative electrode 21 which is an example of a sheet-like electrode. In the electrode assembly 19 of the present embodiment, the plurality of positive electrodes 20 and the plurality of negative electrodes 21 are stacked with the separator 22 interposed therebetween, and fixed by the tape 23.

  The separator 22 is made of a resin and made of a porous film through which lithium ions related to electrical conduction can pass. In the electrode assembly 19, the direction in which the positive electrode 20, the negative electrode 21, and the separator 22 are stacked is also referred to as a stacking direction A.

  In the electrode assembly 19 in which a large number of positive electrodes 20, negative electrodes 21 and separators 22 are stacked, the size (thickness) in the stacking direction A may vary among the electrode assemblies 19. When the difference between the thickness of the electrode assembly 19 and the inner size of the case 12 becomes large, a gap is generated between the electrode assembly 19 and the case 12, and the electrode assembly 19 shakes in the case 12. The electrode assembly 19 may be fixed by the tape 23 in a state in which an appropriate number of spacers (not shown) such as resin sheets are overlapped in order to match the size in the stacking direction A with the inner size of the case 12.

  The positive electrode 20 includes a rectangular positive electrode metal foil (for example, aluminum foil) 24 and a positive electrode active material layer 25 present on both sides of the positive electrode metal foil 24. The positive electrode 20 is provided with a positive electrode current collection tab 26 at a part of one side. The plurality of positive electrode current collection tabs 26 are connected to the positive electrode terminal 15 (see FIG. 1) in a state of being bundled and electrically connected to each other.

  The negative electrode 21 has a rectangular negative electrode metal foil (for example, copper foil) 27 and a negative electrode active material layer 28 present on both sides of the negative electrode metal foil 27. The negative electrode 21 is provided with a negative electrode current collecting tab 29 at a part of one side. The plurality of negative electrode current collection tabs 29 are connected to the negative electrode terminal 16 (see FIG. 1) in a state of being bundled and electrically connected to each other.

  Next, one embodiment of the electrode assembly pallet 31 for transporting the electrode assembly 19 before being fixed by the tape 23 will be described. In the following description, the electrode assembly pallet 31 is also referred to simply as the pallet 31. The pallet 31 is used to transport the electrode assembly 19, for example, from a manufacturing facility of the electrode assembly 19 to a facility for applying the tape 23.

  As shown in FIGS. 3 and 4, the pallet 31 has a main body 32 on which the electrode assembly 19 is placed, a plurality of (four in this embodiment) chuck mechanisms 33 provided on the main body 32, and a main body 32. And a chucking mechanism 33, and a first interposing member 34 (see FIG. 4). The chuck mechanism 33 presses and fixes the electrode assembly 19 placed on the main body 32 against the main body 32. That is, the chuck mechanism 33 holds the electrode assembly 19 in the stacking direction A. The pallet 31 includes the same number of first interposing members 34 as the chuck mechanism 33.

  The main body portion 32 is a plate-like member in which the size in the longitudinal direction at the central part in the lateral direction is smaller than the size in the longitudinal direction at both ends in the lateral direction. The main body portion 32 has a mounting surface 36 on which the electrode assembly 19 is mounted, and a back surface 37 opposite to the mounting surface 36. The electrode assembly 19 is supported by the main body 32 such that the stacking direction A and the thickness direction Z of the main body 32 orthogonal to the mounting surface 36 coincide with each other. The pallet 31 of this embodiment transports the electrode assembly 19 in a state in which the thickness direction Z matches the gravity direction, and one side of the thickness direction Z is the upper side, and the other side of the thickness direction Z is the lower side. Say. The electrode assembly 19 is mounted on the main body 32 with the end face on one side (lower side) of the lamination direction A in contact with the main body 32, and is pressed against the main body 32 by the chuck mechanism 33 from the other side (upper side) .

  As shown in FIG. 4, the main body portion 32 has a first through hole 38 penetrating in the thickness direction Z so as to be open to the mounting surface 36 and the back surface 37. The main body portion 32 has the same number (four in the present embodiment) of first through holes 38 as the chuck mechanism 33.

  The chuck mechanism 33 includes a round rod-like support portion 40 inserted into the first through hole 38 and connected to the main body portion 32, a substantially rectangular flat plate-like chuck portion 41 supported by the support portion 40, and the chuck portion 41. And a substantially disc-like elastic member 42 which can be elastically deformed. The chuck mechanism 33 has a biasing member 43 for biasing the electrode assembly 19 through the chuck portion 41, a cylindrical covering member 44 covering the biasing member 43, and a space between the support portion 40 and the covering member 44. And a cylindrical second interposing member 45 interposed therebetween.

  The chuck portion 41 is disposed with the electrode assembly 19 positioned between the chuck portion 41 and the main body portion 32, and moves relative to the main body portion 32. The base end of the chuck portion 41 is fixed to the distal end (upper end) of the support portion 40 by a fixing screw 47. An elastic member 42 is attached to the tip of the chuck portion 41 so as to face the mounting surface 36 or the electrode assembly 19. That is, the elastic member 42 is interposed between the other (upper) end surface of the electrode assembly 19 and the chuck portion 41. The chuck portion 41 presses the electrode assembly 19 toward the main body portion 32 via the elastic member 42.

  The covering member 44 is attached to the main body 32 by at least one (preferably a plurality of) attachment screws 48. The covering member 44 has a cylindrical side wall 44 a protruding from the main body 32, and an upper wall 44 b located on the upper side of the side wall 44 a and in which a second through hole 49 is formed. The inner dimension of the second through hole 49 is smaller than the inner dimension of the side wall 44a. The covering member 44 is fixed to the mounting surface 36 so that the opening on the main body 32 side (lower side) surrounds the first through hole 38.

  The support portion 40 is inserted into the first through hole 38 formed in the main body portion 32 and the second through hole 49 formed in the covering member 44. The support 40 is movable relative to the main body 32 with the thickness direction Z as the movement direction, and is rotatably provided with the thickness direction Z as the axial direction.

  The support portion 40 has a flange 51 engaged with the biasing member 43 at a position between the chuck portion 41 and the main body portion 32 and near the main body portion 32 in the axial direction. The flange 51 protrudes from the entire circumference of the support portion 40. The biasing member 43 and the flange 51 are surrounded by the covering member 44 and the main body portion 32 and positioned between the first through hole 38 and the second through hole 49 in the thickness direction Z. The flange 51 has a size in the surface direction intersecting the thickness direction Z, which is an example of a moving direction in which the chuck portion 41 moves relative to the main body portion 32, from the inner diameters of the first through holes 38 and the second through holes 49. Too big. The size of the support portion 40 from the flange 51 to the tip in the thickness direction Z is larger than the size of the covering member 44. Therefore, the tip end of the support portion 40 protrudes from the covering member 44, and the chuck portion 41 and the covering member 44 are separated.

  The elastic member 42 is a nonconductive member such as silicon rubber, for example. The elastic member 42 has a size in the surface direction orthogonal to the thickness direction Z smaller than the size in the surface direction orthogonal to the thickness direction Z of the chuck portion 41. The elastic member 42 is interposed between an end surface (upper surface) in the thickness direction Z of the electrode assembly 19 and the chuck portion 41, and is elastically deformed by the pressing of the chuck portion 41. Specifically, the elastic member 42 deforms to conform to the shape of the electrode assembly 19 when the chuck 41 presses the electrode assembly 19.

Next, an embodiment of the first interposing member 34 and the second interposing member 45 will be described.
The configurations of the first interposing member 34 and the second interposing member 45 are substantially the same. Therefore, the same reference numerals are given to the common components, and the redundant description will be omitted.

  As shown in FIGS. 4 and 5, the first interposing member 34 and the second interposing member 45 are non-conductive members made of, for example, resin, and are made of metal, the main body 32, the support 40, And lower in rigidity than the covering member 44. The first interposing member 34 and the second interposing member 45 have an annular large diameter portion 53, a cylindrical small diameter portion 54 whose outer diameter is smaller than the large diameter portion 53, and an insertion hole 55 through which the support portion 40 is inserted. And. The insertion hole 55 is formed to penetrate the large diameter portion 53 and the small diameter portion 54. The diameter of the insertion hole 55 is larger than the outer diameter of the support portion 40. The diameters of the first through holes 38 and the second through holes 49 are larger than the outer diameter of the small diameter portion 54.

  As shown in FIG. 4, at least a portion of the first interposing member 34 intervenes between the support portion 40 and the main body portion 32. Specifically, the first interposing member 34 is rotatably fitted in the first through hole 38 from above in a posture in which the large diameter portion 53 is positioned above the small diameter portion 54. Thereby, at least a part of the small diameter portion 54 of the first interposing member 34 is interposed between the outer peripheral surface of the support portion 40 and the inner peripheral surface of the first through hole 38. In the present embodiment, the entire large diameter portion 53 and the small diameter portion 54 are interposed between the outer peripheral surface of the support portion 40 and the inner peripheral surface of the first through hole 38.

  The second interposing member 45 is rotatably fitted in the second through hole 49 from the lower side in a posture in which the large diameter portion 53 is positioned lower than the small diameter portion 54. Thus, at least a portion of the small diameter portion 54 of the second interposing member 45 intervenes between the outer circumferential surface of the support portion 40 and the inner circumferential surface of the second through hole 49. In the present embodiment, the entire small diameter portion 54 is interposed between the outer peripheral surface of the support portion 40 and the inner peripheral surface of the second through hole 49.

  The biasing member 43 is, for example, a compression coil spring made of metal. The biasing member 43 engages with the flange 51 and the second interposed member 45 in a state where the support portion 40 is inserted into the first through hole 38 of the main body portion 32 and the second through hole 49 of the covering member 44. The biasing member 43 biases the flange 51 downward, and biases the second interposing member 45 against the covering member 44 upward. That is, the biasing member 43 holds the second intervening member 45 with the covering member 44 and biases the support 40 toward the main body 32.

  As shown in FIG. 6, in the chuck mechanism 33, the chuck portion 41 fixes the electrode assembly 19 placed on the main body portion 32 so as to be pressed against the mounting surface 36. When the chuck mechanism 33 fixes the electrode assembly 19, the displacement of the positive electrode 20, the negative electrode 21, and the separator 22 can be suppressed, and the electrode assembly 19 can be transported by a transport device (not shown).

  As shown in FIG. 7, the transfer device includes a release mechanism 57 that releases the electrode assembly 19 from being fixed by the chuck mechanism 33. The transfer device may include a plurality of release mechanisms 57. When the transport apparatus includes a plurality of release mechanisms 57, it is preferable to arrange the same number of release mechanisms 57 as the chuck mechanisms 33 so as to correspond to the chuck mechanisms 33 individually. The release mechanism 57 is located on the back surface 37 side opposite to the mounting surface 36 side where the chuck mechanism 33 is located with respect to the main body 32.

  The release mechanism 57 transmits the power of the drive source 58 via a coupling 59 connected to the shaft of the drive source 58, a drive source 58 such as an air motor that converts, for example, pneumatic energy into rotational motion, and the coupling 59. And the bit 60 to be The release mechanism 57 is provided movably in the thickness direction Z between the release position (see FIG. 7) and the separated position (see FIG. 9). When the release mechanism 57 is in the release position, the bit 60 engages with the screw hole 61 formed at the lower end of the support 40.

Next, the operation when the pallet 31 fixes the electrode assembly 19 will be described.
As shown in FIG. 7, the release mechanism 57 is located at the release position, and the state where the support portion 40 is pushed up is set as the release state where the fixing is released. In the released state, the biasing member 43 is compressed. The electrode assembly 19 is placed on or removed from the placement surface 36 in the released state.

  As shown in FIG. 8, the release mechanism 57 drives the drive source 58 to rotate the bit 60. As a result, the support portion 40 and the chuck portion 41 rotate by, for example, 90 degrees, and the elastic member 42 and the electrode assembly 19 face each other.

  As shown in FIG. 9, when the release mechanism 57 moves downward from the release position and is at the separated position, the support 40 is pushed down by the compressed biasing member 43. As a result, the chuck mechanism 33 presses the electrode assembly 19 against the main body 32 to fix the electrode assembly 19.

  In order to release the fixed state, the release mechanism 57 is operated in the reverse order of the case where the electrode assembly 19 is fixed. When switching between the released state and the fixed state, the first interposing member 34 slides with at least one of the main body 32 and the supporting part 40 as the supporting part 40 rotates and moves, and the second interposing member 45 Slides on at least one of the support 40 and the covering member 44.

  The first interposing member 34 and the second interposing member 45 are nonconductive members, and have lower rigidity than the main body portion 32, the support portion 40, and the covering member 44. Therefore, when the support portion 40 moves and rotates, the first interposing member 34 and the second interposing member 45 wear more easily than the main body portion 32, the support portion 40, and the covering member 44. Therefore, the foreign matter is nonconductive even when the foreign matter is generated due to the wear.

  An opening on the mounting surface 36 side of the first through hole 38 is covered by the covering member 44. In the first through hole 38, the foreign matter overflowing to the mounting surface 36 side is sealed by the covering member 44, and the foreign matter overflowing to the back surface 37 side is blocked by the main body 32 with respect to the electrode assembly 19.

  When the support portion 40 rotates, at least one of the biasing member 43 and the flange 51, and the biasing member 43 and the second intervening member 45 slides. The foreign matter generated by the wear of the biasing member 43, the second intervening member 45, and the flange 51 is sealed by the covering member 44.

According to the above embodiment, the following effects can be obtained.
(1) The nonconductive first intervening member 34 is interposed between the main body 32 and the chuck mechanism 33. Therefore, even when the chuck mechanism 33 moves relative to the main body 32 and a foreign matter is generated from the first interposed member 34, the foreign matter is nonconductive, and the foreign matter causing the short circuit adheres to the electrode assembly 19 The risk can be reduced.

  (2) The biasing member 43 that biases the support portion 40 toward the main body portion 32 is covered by the covering member 44. Thereby, even when the biasing member 43 is worn and a foreign matter is generated, the foreign matter can be retained in the covering member 44, and the possibility of the foreign matter adhering to the electrode assembly 19 supported by the main body portion 32 can be reduced.

  (3) The size in the surface direction intersecting the thickness direction Z of the flange 51 is larger than the inner diameter of the first through hole 38. Therefore, due to the flange 51 engaged with the biasing member 43, there is no possibility that the support portion 40 comes out of the first through hole 38.

  (4) The chuck mechanism 33 has an elastic member 42 interposed between the chuck portion 41 for pressing the electrode assembly 19 against the main body portion 32 and the electrode assembly 19. The elastic member 42 elastically deforms in accordance with the shape of the electrode assembly 19 when the chuck portion 41 fixes the electrode assembly 19. Therefore, the risk of marking on the electrode assembly 19 can be reduced.

  (5) The electrode assembly 19 may be short-circuited when the conductive foreign matter is attached. In that respect, the elastic member 42 is nonconductive. Therefore, even if, for example, the elastic member 42 is damaged and a foreign matter is generated, the foreign matter is nonconductive. Therefore, the possibility that the positive electrode 20 and the negative electrode 21 short circuit in the electrode assembly 19 can be reduced.

  (6) Since the support portion 40 is inserted through the first through hole 38 and the second through hole 49, the support portion 40 can be stably moved as compared with the case where the support portion 40 is inserted only through the first through hole 38 it can. Since the nonconductive second intervening member 45 intervenes between the second through hole 49 and the support portion 40, it is possible to suppress the generation of foreign matter which causes a short circuit.

  (7) The biasing member 43 and the covering member 44 are provided on the side of the mounting surface 36 of the main body 32. Therefore, the pallet 31 can be miniaturized as compared with the case where the biasing member 43 and the covering member 44 are provided on the back surface 37 side of the main body 32.

  (8) The flange 51 is covered by the covering member 44. Therefore, even if, for example, the flange 51 and the biasing member 43 slide and a conductive foreign matter is generated, the foreign matter can be contained by the covering member 44.

  (9) A screw hole 61 is formed at the lower end of the support portion 40, and the bit 60 of the release mechanism 57 is located on the back surface 37 side of the main body portion 32. Therefore, even when conductive foreign matter is generated due to the sliding between the bit 60 and the support part 40, the possibility that the foreign matter adheres to the electrode assembly 19 due to the wall of the main body part 32 is reduced.

  (10) The frictional force acting between the elastic member 42 and the electrode assembly 19 when the electrode assembly 19 is held down via the elastic member 42 is that when the chuck portion 41 directly holds the electrode assembly 19 The frictional force acting between the portion 41 and the electrode assembly 19 is larger than the frictional force. Since the chuck portion 41 holds the electrode assembly 19 via the elastic member 42, it is possible to make the electrode assembly 19 less likely to be displaced as compared with the case where the electrode assembly 19 is held directly.

The above embodiment may be modified as follows. The above embodiment and the following modification may be combined arbitrarily. The configurations included in the following modifications may be arbitrarily combined.
The first interposing member 34 may be fixed to any one of the main body 32 and the support 40 and may be non-rotatable with respect to the fixed main body 32 or the support 40. The electrode assembly pallet 31 may include a plurality of first intervening members 34 interposed between the main body 32 and the support 40. For example, the electrode assembly pallet 31 includes the first interposing member 34 fixed to the main body 32 and the first interposing member 34 fixed to the support 40, and slides the first interposing members 34 against each other. You may

  The second interposing member 45 may be fixed to any one of the support portion 40 and the covering member 44 so as to be non-rotatable with respect to the fixed supporting portion 40 or the covering member 44. The chuck mechanism 33 may include a plurality of second intervening members 45 interposed between the support portion 40 and the covering member 44. For example, the chuck mechanism 33 includes the second intervening member 45 fixed to the support portion 40 and the second intervening member 45 fixed to the covering member 44, and even when the second intervening members 45 slide with each other. Good.

  The outer periphery of the support portion 40 may be coated with a nonconductive material to form a nonconductive layer. The inner peripheral surface of the first through hole 38 or the second through hole 49 may be coated with a nonconductive material to form a nonconductive layer. The nonconductive layer may be an intervening member interposed between the main body 32 and the chuck mechanism 33 or between the covering member 44 and the support 40.

The first interposing member 34 may be fitted in the first through hole 38 from the bottom with the posture in which the large diameter portion 53 is positioned lower than the small diameter portion 54.
The second interposing member 45 may be fitted from above into the second through hole 49 in a posture in which the large diameter portion 53 is positioned above the small diameter portion 54.

The first interposing member 34 and the second interposing member 45 may not have the large diameter portion 53. The first interposing member 34 and the second interposing member 45 may have a cylindrical shape.
The first interposing member 34 may partially intervene between the outer circumferential surface of the support portion 40 and the inner circumferential surface of the first through hole 38. The entire second interposing member 45 may be interposed between the outer peripheral surface of the support portion 40 and the inner peripheral surface of the second through hole 49.

  The support portion 40 may not have the screw hole 61. The lower end of the support portion 40 may be formed into a polygonal column and engaged with a wrench-like bit. The release mechanism 57 may rotate the support 40 by friction transmission.

  The biasing member 43 and the covering member 44 may be attached to the back surface 37 side of the main body 32. In this case, the chuck mechanism 33 may not have the second intervening member 45. Even when the supporting portion 40 and the covering member 44 slide and a conductive foreign matter is generated, the main body 32 is a wall because the main body 32 is positioned between the covering member 44 and the electrode assembly 19 The risk of foreign matter adhering to the electrode assembly 19 is reduced.

The support portion 40 may not have the flange 51.
The flange 51 may be configured as a separate member from the support 40 and attached to the support 40. The biasing member 43 may engage with, for example, a protrusion, a recess, a hole, or the like formed on the support 40. The support portion 40 may separately have a retaining portion that reduces the possibility of the support portion 40 falling out of the first through hole 38 and an engagement portion with which the biasing member 43 engages.

  The chuck mechanism 33 may be configured not to include the biasing member 43, the covering member 44, and the second intervening member 45. The chuck mechanism 33 may fix the electrode assembly 19 by the weight of the support portion 40 and the chuck portion 41.

The elastic member 42 may be conductive.
The positive electrode 20 may be of the type having the positive electrode active material layer 25 on one side of the metal foil 24 for positive electrode, and the negative electrode 21 may be of the type having the negative electrode active material layer 28 on one side of the metal foil 27 for negative electrode.

The electrode assembly 19 may be a wound type in which one band-shaped positive electrode and one band-shaped negative electrode are insulated by a separator and wound around a winding axis.
In the embodiment, the secondary battery 11 is a lithium ion secondary battery. However, the present invention is not limited to this, and may be another secondary battery such as nickel hydrogen. The point is that any ions may move between the positive electrode active material layer and the negative electrode active material layer and transfer and receive electric charges.

Next, technical ideas that can be grasped from the above-described embodiment and the modification will be additionally described below.
(A) The support portion is inserted into the first through hole formed in the main body portion and the second through hole formed in the covering member, and the outer peripheral surface of the support portion and the inner periphery of the second through hole A pallet for an electrode assembly comprising a nonconductive second interposition member interposed between the surface and the surface.

(B) A pallet for an electrode assembly, wherein the covering member is mounted on a mounting surface side on which the electrode assembly is mounted on the main body.
(C) The support portion has a screw hole engaged with a release mechanism for releasing the electrode assembly from the fixed state, and the screw hole is an electrode located on the opposite side of the main body portion to the chuck portion. Assembly pallets.

  19: electrode assembly 20: positive electrode (an example of an electrode) 21: negative electrode (an example of an electrode) 31: pallet for an electrode assembly 32: main body portion 33: chuck mechanism 34: first intervening member , 38: first through hole, 40: support portion, 41: chuck portion, 42: elastic member, 43: biasing member, 44: covering member, 51: flange, A: stacking direction, Z: thickness direction (moving direction An example of

Claims (3)

A body portion on which the electrode assembly can be placed;
A plurality of chuck mechanisms for pressing and fixing the electrode assembly mounted on the main body to the main body;
A non-conductive intervening member interposed between the body portion and the chuck mechanism;
Equipped with
The chuck mechanism
A chuck portion disposed with the electrode assembly positioned between the body portion and the chuck portion moving relative to the body portion;
A support portion that supports the chuck portion and is connected to the main body portion;
Have
A pallet for an electrode assembly, wherein at least a part of the interposed member is interposed between the support portion and the main body portion. The chuck mechanism
A biasing member for biasing the support portion toward the main body portion;
A covering member covering the biasing member;
A pallet for an electrode assembly according to claim 1, comprising: The support portion has a flange which is inserted through and connected to a through hole formed in the main body portion, and which engages with the biasing member between the chuck portion and the main body portion.
The pallet for an electrode assembly according to claim 2, wherein the flange has a size in a plane direction intersecting a moving direction in which the chuck portion moves relative to the main body portion, which is larger than an inner diameter of the through hole.