JP2018045866A - Binding jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten time taken for the temperature of a power storage device to rise to an aging temperature.SOLUTION: A binding jig 50 has a frame body 51. The frame body 51 comprises: guide walls 54 extending upright from a pair of opposite sides of a bottom part 52; and side walls extending upright from two sides different from the pair of sides from which the guide walls 54 are extended upright. The guide walls 54 connect the side walls. A direction opposite to the pair of sides is referred to as a first direction, and a direction along the pair of sides is referred to as a second direction. The binding jig 50 has a plurality of spacers 71. The spacers 71 are in the shape of a rectangular plate. Each spacer 71 comprises a resin part 72 and a fiber group 81. The fiber group 81 comprises first fiber 82 and second fiber 83. While a secondary battery 10 and the spacers 71 are arranged in the second direction, the fiber axis of the first fiber 82 extends in the first direction. The fiber axis of a heat transfer part 84 of the second fiber 83 extends in the second direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a restraining jig.

  A power storage device such as a secondary battery or a capacitor includes a case and an electrode assembly housed in the case. The electrode assembly includes a plurality of electrodes stacked in layers while being insulated from each other.

  When manufacturing a power storage device, an electrode assembly is housed in a case, and then an electrolytic solution is injected into the case from a liquid injection port provided in the case. Next, initial charge / discharge and aging are performed to stabilize and activate the power storage device. When performing aging, the temperature of the power storage device is maintained at a predetermined aging temperature. For example, the power storage device is accommodated in a thermostat, the temperature in the thermostat is adjusted, and the temperature of the power storage device is maintained at the aging temperature.

  Further, when performing aging, it is necessary to suppress an increase in the internal pressure of the case accompanying the generation of gas and the expansion of the case accompanying the expansion of each electrode. For example, in the method for manufacturing a power storage device disclosed in Patent Document 1, after injecting an electrolytic solution into a case of the power storage device, the case is restrained by a restraining jig.

JP 2013-1118048 A

  By the way, for a large number of power storage devices, when performing aging, if a plurality of power storage devices are aged with a single restraining jig, work efficiency is improved. However, when a large number of power storage devices are integrated with a restraining jig, handling such as taking in and out of the thermostatic bath becomes difficult due to an increase in weight. In Patent Document 1, the spacer disposed between the power storage devices is made of resin to reduce the weight and suppress the deterioration of the handleability due to an increase in weight. However, when performing aging, it is also desired to raise the temperature of the power storage device to the aging temperature quickly.

  An object of the present invention is to provide a restraining jig that can shorten the time required for the temperature of the power storage device to rise to the aging temperature.

  A restraining jig that solves the above problem is a restraining jig that restrains the plurality of power storage devices in a stacked state in a frame when adjusting the temperature of a rectangular parallelepiped power storage device in a thermostatic chamber, The frame includes a pair of side walls located at both ends in the stacking direction of the power storage device, and a pair of guide walls that connect the pair of side walls and extend in the stacking direction of the power storage device. A spacer is disposed, and the spacer has a surface facing the guide wall in contact with the guide wall, and the spacer includes a resin part and a fiber group made of a material having a higher thermal conductivity than the resin part, The fiber group includes opposing fibers having fiber axes extending in a direction opposite to the guide wall.

  When aging the power storage device, the temperature of the thermostatic bath is maintained at the aging temperature. The power storage device, the spacer, and the frame body exchange heat with the gas in the thermostatic chamber. Thereby, the temperature of the power storage device, the spacer, and the frame approaches the aging temperature. Since the spacer is in contact with the frame, heat is transferred from the frame to the spacer. Since the fiber axis of the opposing fiber extends in the opposing direction of the guide wall, the heat transmitted from the frame body to the spacer by the opposing fiber is easily transmitted in the opposing direction of the guide wall, and the temperature of the spacer is easily increased. Since the surface of the spacer located in the stacking direction of the power storage device is in contact with the power storage device, heat exchange between the gas in the thermostat and the spacer is difficult. However, by providing the spacer including the opposing fiber, heat is easily transmitted from the spacer to the power storage device, and compared to the case where the opposing fiber is not blended in the resin portion of the spacer or when the fiber is not provided as described above. Thus, the time required for raising the temperature of the power storage device placed in the thermostatic chamber to the aging temperature is shortened.

About the said restraining jig, the said fiber group of the said spacer may be provided with the lamination | stacking fiber in which a fiber axis extends in the lamination direction of the said electrical storage apparatus.
According to this, the heat transferred from the frame to the spacer is easily transferred in the stacking direction of the power storage device. For this reason, heat is easily transmitted from the spacer to the power storage device, and the time required to raise the temperature of the power storage device to the aging temperature is further shortened.

With respect to the restraining jig, the fiber group may be a woven fabric using the opposed fibers as warps and the laminated fibers as wefts, and the laminated fibers may include a folded portion.
According to this, a laminated fiber can be comprised by folding back one long fiber. For this reason, compared with the case where the laminated fiber is divided into a plurality of pieces, heat is easily transmitted along the laminated fiber through the spacer.

About the said restraining jig, the said fiber group may be equipped with the cross fiber which a fiber axis extends in the direction which cross | intersects the said opposing direction and the said lamination direction.
According to this, in the spacer, heat is easily transmitted also in the direction crossing the opposing direction of the guide walls and the stacking direction of the power storage devices. For this reason, it is possible to suppress the occurrence of bias in the temperature of the power storage device.

  Regarding the restraining jig, the spacer includes a hollow housing and a dielectric liquid containing a filler filled in the housing, and the restraining jig includes guides in a direction opposite to the guide wall. A pair of alignment electrodes arranged so as to sandwich the guide wall from the outside of the wall, and a filler aligned by applying a voltage between the alignment electrodes may form the opposing fiber.

  According to this, by applying a voltage between the alignment electrodes, the filler can be aligned and the filler can function as the opposing fiber.

  According to the present invention, the time required for the temperature of the power storage device to rise to the aging temperature can be shortened.

(A) is a perspective view of a secondary battery shown by cutting a part of the case, (b) is a cross-sectional view of the secondary battery. The schematic block diagram of a thermostat. The perspective view of a restraining jig. The top view of a restraining jig. The perspective view which fractures | ruptures and shows a part of spacer. Sectional drawing which expands and shows a part of spacer. (A) And (b) is sectional drawing which expands and shows a part of spacer of a modification. The top view which shows the modification of a restraining jig | tool. Sectional drawing which expands and shows a part of modification of a restraint jig.

Hereinafter, an embodiment of the restraining jig will be described.
As shown in FIG. 1A, the secondary battery 10 as the power storage device includes a case 11. The case 11 includes a bottomed square box-like case main body 12 that is open on one side, and a plate-like lid 13 that closes an opening portion of the case main body 12. The case body 12 includes a rectangular flat bottom wall 14, two long side walls 15 erected from the long side of the bottom wall 14, and two short side walls 16 erected from the short side of the bottom wall 14. The case body 12 and the lid 13 are joined by welding. The secondary battery 10 of this embodiment is a lithium ion secondary battery. The secondary battery 10 is a rectangular battery and has a rectangular parallelepiped shape.

  The secondary battery 10 includes a liquid injection port 17 for injecting an electrolyte into the case 11 and a sealing member 18 that closes the liquid injection port 17. The liquid injection port 17 passes through the lid 13 and communicates the inside and outside of the case 11.

  The secondary battery 10 includes an electrode assembly 21 housed in the case 11, and a positive electrode terminal 22 and a negative electrode terminal 23 that exchange power with the electrode assembly 21. The positive terminal 22 and the negative terminal 23 are fixed to the lid 13.

  As shown in FIG. 1 (b), the electrode assembly 21 has a structure in which positive and negative electrodes 24 are stacked in a state of being insulated from each other via a separator 25. The electrode assembly 21 is accommodated in the case 11 so that the long side wall 15 is positioned in the stacking direction of the electrodes 24. The stacking direction of the electrodes 24 and the plate thickness direction of the long side wall 15 are the same direction.

  Next, the thermostat used when performing aging and initial charge / discharge of the secondary battery 10 will be described. The initial charging / discharging is charging / discharging performed for the purpose of conditioning or initial characteristic inspection in the manufacturing process of the secondary battery 10.

  As shown in FIG. 2, the thermostatic chamber 30 includes a housing portion 31 that houses the secondary battery 10. The accommodating portion 31 includes a supply port 32 that communicates the inside and outside of the accommodating portion 31. The constant temperature bath 30 includes a supply pipe 33 connected to a supply port 32 and a temperature adjustment device 34. The supply pipe 33 connects the temperature adjustment device 34 and the accommodating portion 31. The temperature adjustment device 34 of the present embodiment includes a heat source 35 that heats gas (air) and a cooling device 36 that cools gas (air). The gas heated or cooled by the temperature adjusting device 34 is supplied into the accommodating portion 31 through the supply pipe 33.

  The constant temperature bath 30 includes a temperature sensor 37 that detects the temperature in the housing portion 31 and a control device 38. The temperature sensor 37 outputs the detection result to the control device 38. The control device 38 maintains the inside of the accommodating portion 31 at a predetermined temperature by switching between driving and stopping of the temperature adjusting device 34 based on the detection result of the temperature sensor 37. When performing aging, the temperature in the accommodating part 31 is adjusted to predetermined aging temperature (for example, 60 degree | times). When performing initial charging / discharging, the temperature in the accommodating part 31 is adjusted to predetermined charging / discharging temperature (for example, 20 degree | times). Thereby, the temperature of the secondary battery 10 in the thermostat 30 is adjusted.

  The thermostatic chamber 30 includes a motor 39 and a turntable 40 that rotates by driving the motor 39 in the housing 31. The turntable 40 includes a mounting surface 40a on the upper surface, and a plurality of secondary batteries 10 are mounted on the mounting surface 40a. Each secondary battery 10 is placed on the placement surface 40 a of the turntable 40 while being restrained by the restraining jig 50.

Next, the restraining jig 50 that restrains the secondary battery 10 will be described.
As shown in FIGS. 3 and 4, the restraining jig 50 includes a frame body 51. The frame 51 is made of metal (for example, made of aluminum or aluminum alloy). The frame 51 is a bottomed square cylinder. The frame 51 includes a rectangular plate-shaped bottom 52 and a square frame-shaped peripheral wall 53 erected from the periphery of the bottom 52. The peripheral wall 53 includes a guide wall 54 erected from a pair of opposite sides 52 a of the bottom 52, and a side wall 55 erected from two sides 52 b different from the pair of sides 52 a erected by the guide wall 54. Each guide wall 54 connects a pair of side walls 55. Hereinafter, the opposing direction of the pair of sides 52a is defined as a first direction, and the direction along the pair of sides 52a is defined as a second direction. The first direction coincides with the facing direction of the guide wall 54. The second direction coincides with the direction in which the guide wall 54 extends between the side walls 55. Further, the side walls 55 are located at both ends of the frame body 51 in the second direction.

  Each guide wall 54 and each side wall 55 have a rectangular plate shape. The guide walls 54 face each other in the thickness direction of the guide walls 54. The side walls 55 face each other in the thickness direction of the side walls 55.

  When the mutually opposing surfaces of the guide wall 54 are inner surfaces 54a, the inner surfaces 54a are parallel to each other. The separation distance between the inner surfaces 54a of the guide walls 54 is constant throughout. Heat transfer grease 56 is applied to the entire inner surface 54a of the guide wall 54. The heat transfer grease 56 is, for example, silicon grease (silicon rubber) using acetic acid-based silicon.

  One of the two side walls 55 includes a circular through hole 57. The through hole 57 passes through the side wall 55 in the thickness direction. The through hole 57 communicates the inside of the region S surrounded by the peripheral wall 53 with the outside of the region S. The through hole 57 has an internal thread on the inner peripheral surface.

  The restraining jig 50 includes fins 58 attached to the frame body 51. The fins 58 are fixed to the outer surface 54 b of each guide wall 54. The fins 58 of this embodiment are corrugated fins obtained by folding a metal plate.

  The restraining jig 50 includes a loading member 60. The load member 60 includes a rod 61 and a pressing plate 62. The rod 61 is cylindrical. The rod 61 includes a male screw on the outer peripheral surface. The male screw of the rod 61 is screwed into the female screw of the through hole 57. The rod 61 straddles the region S and the region S. Of the both ends of the rod 61, the end in the region S is the tip, and the end outside the region S is the base. A rectangular plate-shaped pressing plate 62 is attached to the tip of the rod 61. The thickness direction of the pressing plate 62 is the same as the axial direction of the rod 61 (the thickness direction of the side wall 55). The longitudinal direction of the surface in the thickness direction of the pressing plate 62 is defined as the longitudinal direction of the pressing plate 62, and the short direction of the surface in the thickness direction of the pressing plate 62 is defined as the lateral direction of the pressing plate 62. The pressing plate 62 is attached to the rod 61 so that the longitudinal direction matches the plate thickness direction of the guide wall 54. The longitudinal dimension of the pressing plate 62 is slightly shorter than the distance between the inner surfaces 54 a of the guide walls 54. The dimension of the pressing plate 62 in the short direction is substantially the same as the dimension of the guide wall 54 in the standing direction from the bottom 52.

  The pressing plate 62 is attached to the rod 61 so as not to rotate due to the rotation of the rod 61. The pressing plate 62 is movable in the second direction in the region S by linear movement accompanying the rotation of the rod 61. Although not shown, a handle for assisting the rotation of the rod 61 is attached to the proximal end of the rod 61.

  As shown in FIGS. 4 and 5, the restraining jig 50 includes a plurality of spacers 71. The spacer 71 has a rectangular plate shape. The spacer 71 is a fiber-reinforced composite agent and has a structure in which a fiber group 81 serving as a base material is impregnated with a resin. The spacer 71 includes a resin part 72 and a fiber layer 80 blended in the resin part 72. The longitudinal direction of the surfaces 72A and 72B in the plate thickness direction of the spacer 71 is the longitudinal direction of the spacer, and the short direction of the surfaces 72A and 72B of the spacer 71 in the plate thickness direction is the short direction of the spacer 71. The fiber layer 80 has a structure in which a plurality of fiber groups 81 are stacked in the short direction of the spacer 71.

  As shown in FIGS. 5 and 6, each fiber group 81 is configured by weaving first fibers 82 and second fibers 83. The first fiber 82 and the second fiber 83 are made of a material having a higher thermal conductivity than the resin portion 72, such as a carbon fiber or a metal wire such as aluminum or copper. The fiber group 81 of the present embodiment is a woven fabric in which a first fiber 82 is a warp and a second fiber 83 is a weft and is pile-woven.

  The fiber axis of the first fiber 82 extends in the longitudinal direction of the spacer 71. The plurality of first fibers 82 are arranged in the thickness direction of the spacer 71. The first fibers 82 are long fibers. The dimension of the first fiber 82 is slightly shorter than the dimension of the spacer 71 in the longitudinal direction. In the following description, one of the first fibers 82 located at both ends of the spacer 71 in the plate thickness direction is referred to as a first end fiber 82A, and the other is referred to as a second end fiber 82B. Of the surfaces in the plate thickness direction of the spacer 71, the surface on the first end fiber 82A side is defined as a first surface 72A, and the surface on the second end fiber 82B side is defined as a second surface 72B.

  The second fiber 83 of the present embodiment is a long fiber. The second fibers 83 are folded back after extending toward the first surface 72A from the first end fibers 82A in the thickness direction of the spacer 71. The folded second fiber 83 extends toward the second surface 72B side of the second end fiber 82B in the thickness direction of the spacer 71, and is then folded. By repeating this, the second fiber 83 constitutes a plurality of heat transfer portions 84 having a shape in which the fiber axis extends in the plate thickness direction of the spacer 71 and an arcuate folded portion 85 that connects the heat transfer portions 84 to each other.

  The length of the spacer 71 in the longitudinal direction is slightly shorter than the distance between the inner surfaces 54 a of the guide walls 54. The dimension of the spacer 71 in the short direction is substantially the same as the dimension of the guide wall 54 in the standing direction from the bottom 52.

  When the secondary battery 10 is restrained using the restraining jig 50, the spacer 71 and the secondary battery 10 are alternately arranged between the pressing plate 62 and the side wall 55 not provided with the through hole 57 in the region S. Are lined up. The spacer 71 and the secondary battery 10 are arranged in the second direction. Note that the spacers 71 are located at both ends in the direction in which the spacers 71 and the secondary battery 10 are arranged. The spacer 71 is disposed such that the plate thickness direction coincides with the second direction and the longitudinal direction coincides with the first direction. The secondary battery 10 is arranged such that the plate thickness direction of the long side wall 15 coincides with the second direction. Thus, the secondary battery 10 is sandwiched between the spacers 71 from the stacking direction of the electrodes 24. In this state, the rod 61 is linearly moved so as to approach the spacer 71, and the spacer 71 and the secondary battery 10 are sandwiched between the pressing plate 62 and the side wall 55, whereby the secondary battery 10 is restrained in the stacking direction of the electrodes 24. A load is applied. Thereby, the secondary battery 10 arrange | positioned in the frame 51 is restrained by the lamination | stacking state laminated | stacked on the 2nd direction. Therefore, the stacking direction of the secondary battery (power storage device) 10 is the second direction.

  In a state where the secondary battery 10 and the spacer 71 are arranged between the guide walls 54, the fiber axis of the first fiber 82 extends in the first direction. Further, the fiber axis of the heat transfer portion 84 of the second fiber 83 extends in the second direction. Therefore, the first fibers 82 are opposed fibers that extend in the opposing direction of the guide wall 54, and the second fibers 83 are laminated fibers that extend in the stacking direction of the secondary battery 10.

  In a state where the secondary battery 10 and the spacer 71 are alternately arranged in the second direction, the side surface 71 a positioned in the longitudinal direction of the spacer 71 is a surface facing the guide wall 54. The side surface 71 a of the spacer 71 is in contact with the inner surface 54 a of the guide wall 54 through the heat transfer grease 56 throughout. That is, when the secondary battery 10 and the spacer 71 are arranged between the guide walls 54 by adjusting at least one of the dimension in the longitudinal direction of the spacer 71 and the application amount (thickness) of the heat transfer grease 56. The side surface 71 a of the spacer 71 is in contact with the inner surface 54 a of the guide wall 54 through the heat transfer grease 56.

Next, the operation of the restraining jig 50 of this embodiment will be described.
First, the case where the secondary battery 10 is aged will be described.
When the secondary battery 10 is aged, a plurality of secondary batteries 10 restrained by the restraining jig 50 are placed on the placement surface 40 a of the turntable 40 in the housing portion 31. The secondary battery 10 is fully charged before being restrained by the restraining jig 50. And the inside of the accommodating part 31 (constant temperature bath 30) is maintained by aging temperature by the temperature control apparatus 34. FIG.

  The temperatures of the frame body 51, the spacer 71, and the secondary battery 10 approach the aging temperature by exchanging heat with the air in the housing portion 31 (the temperature of the secondary battery 10 increases). Since the frame body 51 and the spacer 71 are in contact with each other, the heat of the frame body 51 is transmitted to the spacer 71. The heat transmitted from the frame body 51 is transmitted along the first fiber 82 from the guide wall 54 in the longitudinal direction of the spacer 71. Further, the heat transmitted from the frame 51 is transmitted along the second fiber 83 in the thickness direction of the spacer 71. Since heat can be diffused in the spacer 71 by the fiber group 81, the heat is easily transmitted to the surface of the spacer 71 in the plate thickness direction. The heat transmitted to the surface of the spacer 71 in the plate thickness direction is transmitted to the secondary battery 10. That is, when the secondary battery 10 is aged, the fiber group 81 forms a heat transfer path that transfers heat to the secondary battery 10 while diffusing heat.

Next, the case where the initial charge / discharge of the secondary battery 10 is performed will be described.
Similarly to the case of aging when performing the initial charge / discharge of the secondary battery 10, the secondary battery 10 restrained by the restraining jig 50 is accommodated in the thermostatic chamber 30, and is stored in the accommodating portion 31 (the thermostatic chamber 30). Maintain temperature at charge / discharge temperature.

  The secondary battery 10 generates heat by charging and discharging. For this reason, the temperature of the secondary battery 10 tends to be higher than the charge / discharge temperature. Heat generated by charging / discharging is transmitted to the spacer 71. The heat transferred from the secondary battery 10 to the spacer 71 is transferred along the second fiber 83 in the plate thickness direction of the spacer 71. The heat transferred from the secondary battery 10 to the spacer 71 is transferred along the first fiber 82 in the longitudinal direction of the spacer 71. Since heat can be diffused in the spacer 71 by the fiber group 81, heat is easily transmitted from the secondary battery 10 to the spacer 71. The heat is transferred to the frame 51, whereby the secondary battery 10 is dissipated. That is, when performing the initial charge / discharge of the secondary battery 10, a heat transfer path for transferring heat to the frame 51 while diffusing heat by the fiber group 81 is formed.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) The restraining jig 50 includes a spacer 71. In a state where the secondary battery 10 and the spacer 71 are arranged in the second direction, the first fibers 82 extend in the first direction. Therefore, when aging is performed, the heat transmitted from the frame 51 to the spacer 71 is easily transmitted in the longitudinal direction of the spacer 71 by the first fibers 82. Since the first surface 72 </ b> A and the second surface 72 </ b> B of the spacer 71 are in contact with the secondary battery 10, heat exchange between the gas in the thermostat 30 and the spacer 71 is difficult. However, since heat is easily transmitted in the longitudinal direction of the spacer 71 due to the first fibers 82, the temperature of the spacer 71 is likely to rise. For this reason, the secondary battery put into the thermostat 30 compared with the case where the 1st fiber 82 is not mix | blended with the resin part 72 of the spacer 71, or the case where the fiber is extended in the direction different from a 1st direction. The time required to raise the temperature of 10 to the aging temperature is shortened.

  (2) The heat transfer portion 84 of the second fiber 83 extends in the second direction. For this reason, the heat transmitted to the spacer 71 is easily transmitted in the plate thickness direction. For this reason, heat is easily transmitted from the spacer 71 to the secondary battery 10, and the time required to raise the temperature of the secondary battery 10 to the aging temperature can be further shortened.

  (3) Further, when performing initial charge / discharge, heat generated by the secondary battery 10 is transmitted to the spacer 71. The heat transferred from the secondary battery 10 is easily transferred in the plate thickness direction and the longitudinal direction of the spacer 71. For this reason, heat can be efficiently transmitted to the guide wall 54. The temperature of the secondary battery 10 is charged by the heat generated by the secondary battery 10 due to charge and discharge, compared to the case where the spacer 71 not including the fiber group 81 or the spacer 71 where the fiber group 81 is not provided as in the embodiment is used. It can suppress becoming higher than discharge temperature. Therefore, it is easy to maintain the temperature of the secondary battery 10 at the charge / discharge temperature.

  (4) The resin part 72 is lighter than the fiber group 81 (the specific gravity is small). Therefore, the weight of the restraining jig 50 can be reduced as compared with the case where the entire spacer 71 is made of metal or the like. For this reason, it is easy to carry the restraining jig 50 when placing the restraining jig 50 restraining the secondary battery 10 on the placement surface 40a of the turntable 40.

  (5) The second fiber 83 is configured by folding one long fiber. For this reason, heat is more easily transmitted to the spacer 71 than when a plurality of divided fibers are used, such as when the second fiber is a plurality of short fibers.

In addition, you may change embodiment as follows.
As shown in FIG. 7A, the second fiber may be a plurality of fillers (short fibers) 91. The plurality of fillers 91 are located closer to the secondary battery 10 than the first fibers 82 in the second direction. The filler 91 is oriented in the second direction.

  ○ As shown in FIG. 7B, the fiber group 81 may include third fibers 92 whose fiber axes extend in the short direction of the spacer 71. In a state where the secondary battery 10 and the spacer 71 are arranged in the second direction, the third fibers 92 extend in the first direction and the direction intersecting (orthogonal) with the second direction. The third fibers 92 are crossed fibers whose fiber axes extend in the direction facing the guide wall 54 and the direction crossing the stacking direction of the secondary batteries 10. Due to the third fibers 92, heat is easily diffused also in the short direction of the spacer 71, and the temperature in the spacer 71 is not easily biased. For this reason, the bias of the heat transmitted to the secondary battery 10 hardly occurs, and the bias of the temperature of the secondary battery 10 can be suppressed.

  As shown in FIG. 8, the restraining jig 100 may include a pair of alignment electrodes 101 in addition to the frame body 51 and the spacer 110. The alignment electrodes 101 are disposed to face each other in the first direction. The alignment electrode 101 is disposed so as to sandwich the guide wall 54 from the outside in the first direction. That is, the frame 51 is provided between the alignment electrodes 101. The alignment electrode 101 is, for example, a metal plate. One of the alignment electrodes 101 is connected to the positive electrode of the power source 102, and the other of the alignment electrodes 101 is connected to the negative electrode of the power source 102. Thereby, a voltage can be applied between the alignment electrodes 101.

  As shown in FIG. 9, the spacer 110 has a rectangular parallelepiped shape, and includes a resin-made housing 112 having a hollow shape, and a dielectric liquid 111 filled in the housing 112. The spacer 110 includes a plurality of bosses 114 extending in the thickness direction of the spacer 110 inside a housing 112 serving as a resin portion. The plurality of bosses 114 are, for example, arranged in a lattice shape or a zigzag shape when viewed from the thickness direction of the spacer 110. Each boss 114 has a columnar shape such as a columnar shape whose axis extends in the plate thickness direction of the spacer 110 or a prismatic shape. The dielectric liquid 111 holds the filler 115, which is an inorganic substance, in a dispersed manner. The dielectric liquid 111 is a liquid that is polarized when a voltage is applied. For example, silicon oil, carbon tetrachloride, fluorine-chlorine-substituted hydrocarbon, n-hexane, cyclohexane, or the like can be used. The filler 115 is, for example, a nanotube such as a carbon product, boron nitride, silicon carbide, silicon oxide, aluminum oxide, vanadium oxide, molybdenum oxide, or titanium oxide. In the filler 115, the direction in which the axis of the nanotube extends is the axial direction (fiber axis).

  When a voltage is applied between the alignment electrodes 101, the fillers 115 are linearly aligned by electrostatic alignment. One end of the filler 115 in the axial direction faces one orientation electrode 101, and the other end in the axial direction of the filler 115 faces the other orientation electrode 101. Thereby, the filler 115 is oriented in a state in which the axis extends in the first direction that is the facing direction of the guide wall 54, and forms the facing fiber.

  When performing aging and initial charge / discharge of the secondary battery 10 using the restraining jig 100 described above, the restraining jig 100 that restrains the secondary battery 10 is placed on the mounting surface 40 a of the turntable 40. Placed. During aging and initial charging, a state in which a voltage is applied between the alignment electrodes 101 is maintained. Thus, during aging and initial charging, heat is easily transmitted in the longitudinal direction of the spacer 71 by the filler 115, and the time required to raise the temperature of the secondary battery 10 to the aging temperature is shortened.

In the spacer 110 described above, the boss 114 does not have to be provided.
The fiber group 81 may not be a woven fabric, and may have a configuration in which the first fiber and the second fiber are stacked.

The first fiber 82 and the second fiber 83 may be woven by any weaving method such as plain weave or twill weave.
The fiber group 81 may be composed of only a plurality of first fibers 82.

  The side surface 71a of the spacer 71 and the inner surface 54a of the guide wall 54 may be in direct contact. That is, the spacer 71 and the frame 51 may be in contact with each other without using the heat transfer grease 56.

As the fins 58, other than corrugated fins may be used. For example, a plate fin provided with a plurality of plates standing from a flat base portion may be used.
-The fin 58 does not need to be provided.

○ For example, when it is not necessary to cool the gas, for example, when only aging is performed, the temperature adjustment device 34 of the thermostatic bath 30 may include only the heat source 35.
The secondary battery 10 may be a nickel hydride secondary battery. The power storage device may be a capacitor.

The frame body 51 may not include the bottom portion 52. In this case, the secondary battery 10 is supported by being sandwiched between the pressing plate 62 and the side wall 55.
The electrode assembly 21 may be a wound type in which a belt-like positive electrode and a belt-like negative electrode are wound and laminated in layers.

The fin 58 may be attached to the side wall 55.
The spacer 71 may include metal portions on both surfaces of the resin portion 72 in the plate thickness direction.
The heat transfer grease 56 may be provided on a part of the inner surface 54 a of the guide wall 54. For example, the spacer 71 may be provided only at a portion facing the side surface 71a. Further, the heat transfer grease 56 may not be provided in a portion located between the pressing plate 62 and the side wall 55 having the through hole 57.

  ○ Integrate the spacer having the folded portion 85 projecting closer to the first surface 72A than the first end fiber 82A and the spacer having the folded portion 85 projecting closer to the second surface 72B than the second end fiber 82B. Thus, a single spacer may be used.

  DESCRIPTION OF SYMBOLS 10 ... Secondary battery (electric storage apparatus) 11 ... Case, 21 ... Electrode assembly, 24 ... Electrode, 30 ... Constant temperature bath, 50 ... Restraint jig, 51 ... Frame, 52 ... Bottom part, 54 ... Guide wall, 55 ... side walls, 71, 110 ... spacers, 71a ... side faces (surfaces facing the guide walls), 72 ... resin part, 81 ... fiber group, 82 ... first fibers (opposing fibers), 83 ... second fibers (laminated fibers) 84 ... Heat transfer part, 85 ... Folded part, 92 ... Third fiber (cross fiber), 100 ... Restraint jig, 101 ... Orientation electrode, 111 ... Dielectric liquid, 112 ... Housing, 115 ... Filler.

Claims (5)

When the temperature of the rectangular parallelepiped power storage device is adjusted in the thermostat, a restraining jig that restrains the plurality of power storage devices in a stacked state in the frame body,
The frame includes a pair of side walls located at both ends in the stacking direction of the power storage device, and a pair of guide walls that connect the pair of side walls and extend in the stacking direction of the power storage device,
A spacer is disposed between the power storage devices,
The spacer has a surface facing the guide wall in contact with the guide wall,
The spacer includes a resin part and a fiber group made of a material having a higher thermal conductivity than the resin part,
The said fiber group is a restraining jig | tool provided with the opposing fiber in which a fiber axis extends in the opposing direction of the said guide wall.   The restraint jig according to claim 1, wherein the fiber group of the spacer includes a laminated fiber having a fiber axis extending in a laminating direction of the power storage device. The fiber group is a woven fabric having the opposing fiber as a warp and the laminated fiber as a weft,
The restraint jig according to claim 2, wherein the laminated fiber includes a folded portion. The fiber group is
The restraint jig according to claim 2, further comprising a cross fiber having a fiber axis extending in the opposite direction and in a direction crossing the stacking direction. The spacer is
A hollow housing;
A dielectric liquid containing a filler filled in the housing, and
The restraining jig is
A pair of alignment electrodes arranged so as to sandwich the guide wall from the outside of each guide wall in the opposing direction of the guide wall;
The restraint jig according to claim 1, wherein a filler oriented by applying a voltage between the orientation electrodes forms the opposing fiber.

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