JP2014203778A - Charge/discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge/discharge device capable of sufficiently preventing another secondary battery from generating heat by stopping the application of a current when one secondary battery is generating heat.SOLUTION: In a charge/discharge device 1, a charge/discharge unit 20 is attached to a charge/discharge jig 2 by being linked thereto with a return spring 15 so as to be able to slide in the lamination direction of a secondary battery 5. The charge/discharge unit 20 is provided with a profiling tooth 23 inserted between spacers 35 for positioning relative to the secondary battery 5 and formed with low incombustibility material, the profiling tooth 23 being inserted between the spacers 35, and the charge/discharge unit 20 is displaced leftward relative to the charge/discharge jig 2, thereby causing the return spring 15 to elongate. Then, charging/discharging to and from the secondary battery 5 is performed while the leftward elongation of the return spring 15 is maintained to be larger than a distance between the right-side end part on contact face of a terminal 6 and the left-side end part at charge time of a charge/discharge probe 24.

Description

  The present invention relates to a charging / discharging device for charging / discharging a plurality of secondary batteries at a time.

  In recent years, with the development of mobile devices such as mobile phones and mobile personal computers, and the practical application of electric vehicles and hybrid vehicles, demand for secondary batteries such as nickel metal hydride batteries and lithium ion batteries is increasing. In the manufacturing process of such a secondary battery, after assembling each component, the battery is adjusted to predetermined characteristics by, for example, activating the battery by charging / discharging or the like. After the battery is assembled, a plurality of secondary batteries are stacked via spacers in the charging / discharging device, and charging / discharging is performed at a time with the charging / discharging probe in contact with the terminals of the respective secondary batteries. At that time, a charging / discharging device that positions the charging / discharging unit with respect to the stacked secondary batteries by providing copying teeth on the charging / discharging unit provided with the charging / discharging probe and inserting the copying teeth between the spacers. (See, for example, Patent Document 1 below).

JP 2010-140844 A

  On the other hand, when some of the secondary batteries set in the charge / discharge device generate heat due to an internal short circuit or overcharge during charging, it is necessary to stop application of current in the other secondary batteries. However, according to the charging / discharging device described in the above-mentioned patent document, there is no configuration for stopping the application of current when the secondary battery generates heat, and a configuration that sufficiently prevents the heat generation of other secondary batteries and It was not.

  In view of the above situation, the present invention provides a charging / discharging device that can sufficiently prevent the heat generation of another secondary battery by stopping the application of current when the secondary battery generates heat.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a plurality of secondary batteries are stacked in the thickness direction and arranged on a battery pallet, and charge / discharge treatment is performed on contact surfaces formed on the positive electrode terminal and the negative electrode terminal of each of the secondary batteries. A charge / discharge device for contacting and charging / discharging the secondary battery by contacting a charge / discharge probe provided on the tool, wherein the plurality of secondary batteries are held in a state of being sandwiched one by one in a stacking direction; A plurality of charging / discharging units attached to the charging / discharging jig by a return spring so as to be slidable in the stacking direction of the secondary battery, and the charging / discharging probe corresponds to the secondary battery. In addition, a predetermined number is provided for each of the plurality of charge / discharge units, and the charge / discharge units are formed of a low-flame retardant material that is inserted between the spacers and performs positioning with respect to the secondary battery. And a copy tooth During charging / discharging of the secondary battery, the copying teeth are inserted between the spacers, and the charging / discharging unit is displaced relative to the charging / discharging jig toward one direction in the stacking direction. The return spring is extended, and the extension of the return spring in the stacking direction is determined by the distance between the one-direction opposite end of the contact surface and the one-direction end of the charge / discharge probe. It will also make it bigger.

  In claim 2, opposing contact slopes are formed at respective tip portions of the copying teeth and the spacers, and the contact teeth are slid in a state of contacting each other, so that the copying teeth are By inserting between the spacers, the charge / discharge unit is displaced relatively to one direction side in the stacking direction with respect to the charge / discharge jig.

  In Claim 3, after inserting the said copying tooth between the said spacers, the said charging / discharging jig | tool is displaced to the direction opposite to the said one direction, The said charging / discharging unit is made with respect to the said charging / discharging jig | tool. And relatively displaced in the one direction side.

  According to the present invention, it is possible to sufficiently prevent the heat generation of other secondary batteries by stopping the application of current when the secondary battery generates heat in the charge / discharge device.

The side view which showed the charge condition of the charging / discharging apparatus which concerns on 1st embodiment. The side view which similarly showed the preparation state of the charging / discharging apparatus. The side view which showed the charging / discharging unit of a preparation state similarly in a charging / discharging apparatus. The side view which showed the charging / discharging unit of a movement state similarly in a charging / discharging apparatus. The side view which showed the charging / discharging unit of the charge state similarly in the charging / discharging apparatus. The side view which showed the positional relationship of a copying tooth and a secondary battery. The side view which showed the charging / discharging unit of the heat_generation | fever state similarly in charging / discharging apparatus. The top view which showed the positional relationship of the charging / discharging probe and the terminal in a secondary battery. The side view which showed the preparation state of the charging / discharging apparatus which concerns on 2nd embodiment. The side view which similarly showed the movement state of the charging / discharging apparatus. The side view which similarly showed the charge condition of the charging / discharging apparatus.

Next, embodiments of the invention will be described.
It should be noted that the technical scope of the present invention is not limited to the following examples, but broadly covers the entire scope of the technical idea that the present invention truly intends, as will be apparent from the matters described in the present specification and drawings. It extends.

  With reference to FIG.1 and FIG.2, schematic structure of the charging / discharging apparatus 1 which is 1st embodiment of the charging / discharging apparatus which concerns on this invention is demonstrated. FIG. 1 is a side view at the time of charging showing the charging / discharging device 1 of the present embodiment. This charging / discharging device 1 is capable of charging at a time in a state where 25 secondary batteries 5 are stacked in the thickness direction (left-right direction in the drawing). As shown in FIG. 2, the charging / discharging device 1 is roughly divided into an upper charging / discharging jig 2 having a charging / discharging probe 24 and moving up and down, and a battery pallet 3 in which secondary batteries 5 are stacked in the thickness direction. It consists of The charging / discharging jig 2 corresponds to 25 secondary batteries 5 (more specifically, corresponding to each terminal 6 constituting the positive electrode / negative electrode of the secondary battery 5), and each of the charging / discharging probes 24 ( The charge / discharge probe 24 is connected to a power source (not shown) through a power cord 25. Then, the charging / discharging jig 2 is moved up and down as shown by an arrow A in FIG. 1 by a lifting device (not shown), so that each charging / discharging probe 24 contacts the terminal 6 constituting the positive electrode and the negative electrode of the secondary battery 5. It is comprised so that it may contact | abut and space apart from the contact surface (upper surface of the terminal 6 in FIGS. 3-6).

  The charging / discharging jig 2 is provided with a rod-like base 11 that is long in the longitudinal direction (the horizontal direction in the drawing, the same applies hereinafter), and vertical plates 12 and 13 are fixed to both ends thereof. And the both ends of the guide rod 14 which is a plate-shaped member extended in the longitudinal direction are being fixed to the vertical plates 12 and 13. FIG. A plurality of charge / discharge units 20 with the guide rods 14 penetrating therethrough are slidable along the guide rods 14 in the horizontal direction of the drawing, that is, in the stacking direction of the secondary batteries 5.

  FIG. 3 is a side view of the charge / discharge unit 20 and the corresponding secondary battery 5 or the like. The charge / discharge unit 20 has a slide block 21 that can slide along the guide rod 14, and the guide rod 14 passes through a slide hole 21 a formed therethrough. One plate 22 is fixed to each end of the slide block 21 (both ends in the direction penetrating the paper surface). A scanning tooth 23 having a contact slope 23a formed at the tip is fixed to the lower part of the plate 22 on the front side of the drawing. The copying tooth 23 is formed so as to be lowered along a spacer 35 described later, and a POM material having low flame retardancy is used as the material thereof. A terminal holder 22b is fixed to the inner surface of each plate 22 in the charge / discharge unit 20, and the terminal holder 22b has a positive electrode side corresponding to the terminals (positive electrode terminal and negative electrode terminal) 6 of the three secondary batteries 5. And a charge / discharge probe 24 on the negative electrode side are provided. That is, the charge / discharge probe 24 is provided with a predetermined number of three for each charge / discharge unit 20 corresponding to a set of three secondary batteries 5.

In this embodiment, as shown in FIGS. 1 and 2, a charge / discharge unit 20 corresponding to these three secondary batteries 5 and a charge / discharge unit 20 x corresponding to the two secondary batteries 5 are provided. Yes. The charge / discharge unit 20 x is configured in the same manner as the charge / discharge unit 20 except that the charge / discharge probe 24 corresponds to the two secondary batteries 5. As described above, the charging / discharging device 1 performs charging / discharging with the 25 secondary batteries 5 as one set, and therefore, seven charging / discharging units 20 and two charging / discharging units 20x are shown in FIG. And as shown in FIG. 2, it is arrange | positioned so that sliding with respect to the guide rod 14 is possible.
In the present embodiment, the number of secondary batteries 5 corresponding to the charge / discharge units 20 and 20x and the number of charge / discharge probes 24 provided in the charge / discharge units 20 and 20x corresponding to the secondary batteries 5 (2 The number of pieces and three pieces is an example, and any number may be used.

  As shown in FIG. 1, a plurality of charging / discharging units 20 (including the charging / discharging unit 20x; the same applies hereinafter) of the charging / discharging jig 2 during charging are all pulled in the same direction (right side of the drawing) by the return spring 15. Yes. The return spring 15 is connected obliquely between the fixed portion 22a of the plate 22 and the fixed portion 11a of the base 11, so that the charge / discharge unit 20 is always pulled to the right side of the drawing. In other words, the charging / discharging unit 20 is attached to the base 11 of the charging / discharging jig 2 by the return spring 15 so as to be slidable in the left-right direction, which is the stacking direction of the secondary batteries 5.

  Next, the battery pallet 3 of the charge / discharge device 1 will be described. In the battery pallet 3, end plates 32 and 33 are erected and fixed to both ends of the long base 31 in the longitudinal direction. A plurality of beam members (not shown) are connected and spanned between the end plates 32 and 33. The end plates 32 and 33 are formed in a substantially rectangular shape in accordance with the shape of the secondary battery 5 when the battery pallet 3 is viewed in the longitudinal direction, and are provided at the corners and side intermediate positions. Are connected by Therefore, the secondary battery 5 is inserted from above into the space surrounded by the end plates 32 and 33 and the beam member, and the charge / discharge probe 24 of the charge / discharge jig 2 approaches the secondary battery 5 from above. It is like that.

  In addition, the battery pallet 3 is provided with a spacer 35 in a space for inserting the secondary battery 5. The spacers 35 are arranged between the adjacent secondary batteries 5, and the number of the spacers 35 is enough to sandwich 25 secondary batteries 5 from both sides in the longitudinal direction (thickness direction of the secondary battery 5) (26 Are provided). Further, since the secondary battery 5 has a battery thickness variation due to a change in the thickness of the electrode body and gas is generated during charging and the battery case expands, the spacer 35 is positioned so that the spacer 35 is displaced in accordance with the expansion. The pallet 3 can be moved in the longitudinal direction. Therefore, although not shown, for example, a concave groove is formed on the side surface of the spacer, and it is configured to move along the beam member fitted therein.

  A constant load is applied to the battery pallet 3 with respect to the plurality of secondary batteries 5 and the spacer 35 during charging, and a restraining jig is provided. As shown in FIGS. 1 and 2, the restraining jig includes a contact plate 41 that directly contacts the spacer 35, a bolt 47 in which a male screw portion 47 a is screwed into the end plate 32, and the like. And the magnitude | size of the load which the contact plate 41 applies to the spacer 35 is adjusted by adjusting the length in which the volt | bolt 47 is screwed in with respect to the edge part board 32. FIG.

  As shown in FIG. 3, the end portion of the spacer 35 in the front-rear direction of the paper surface is formed in a mountain shape with a contact slope 35 a formed on the upper portion thereof. The copying teeth 23 fixed to the charging / discharging unit 20 of the charging / discharging jig 2 are arranged at the position where the contact slope 23a faces the contact slope 35a of the spacer 35 with the same slope direction. . That is, as shown in FIG. 4, the copying tooth 23 is configured to be slidable when the charging / discharging jig 2 is lowered and the contact slope 23 a formed at the tip thereof is in contact with the contact slope 35 a of the spacer 35. ing. As a result, the copying teeth 23 smoothly enter between the spacers 35 as shown in FIG. 5 and can be positioned with respect to the secondary battery 5.

  In the present embodiment, as shown in FIG. 3, three secondary batteries 5 correspond to one charge / discharge unit 20. Therefore, the copying teeth 23 of the charge / discharge unit 20 can be positioned by being inserted between the two spacers 35, 35 sandwiching the central secondary battery 5. At that time, the secondary battery 5 and the spacer 35 are pressed against the opposite end plate 33 side with a fixed load by a restraining jig.

  According to the charging / discharging device 1 of the present embodiment configured as described above, the charging operation is performed as follows. In the secondary battery 5, an electrode terminal 6 including a positive electrode and a negative electrode is inserted into a battery case, and after an electrolyte is injected, the battery is sealed and an initial charge is performed. Then, as shown in FIG. 1, 25 secondary batteries 5 are sequentially inserted between the spacers 35 with respect to the battery pallet 3, and are pressed by a restraining jig after all the secondary batteries 5 are inserted. . That is, the secondary battery 5 is held in a state of being sandwiched by the spacers 35 in the stacking direction. Thus, the spacer 35 holds the plurality of secondary batteries 5 in a state of being sandwiched one by one in the stacking direction.

  After the secondary battery 5 is set on the battery pallet 3, the charging / discharging jig 2 is lowered as shown by an arrow U1 in FIG. As shown in FIG. 4, the contact slope 23 a of the copying tooth 23 and the contact slope 35 a of the spacer 35 come into contact. Further, when the charging / discharging jig 2 is lowered as shown by an arrow U2 in FIG. 4, the copying teeth 23 and the spacer 35 slide on the contact slope 23a and the contact slope 35a, so that the arrow H1 in FIG. As shown, the charge / discharge unit 20 is moved along the rod 14 in the left direction in the drawing, whereby the copying teeth 23 are guided between the spacers 35. In this way, the copying teeth 23 are positioned between the spacers 35 as shown in FIG. At this time, each charge / discharge probe 24 comes into contact with the terminal 6 constituting the positive electrode and the negative electrode of the secondary battery 5.

  When the copying tooth 23 is guided between the spacers 35 as described above, the copying tooth 23 moves from the initial position (solid line position in FIG. 6) to the left of the drawing as shown in FIG. 6 (in FIG. 6). Move to the position of the two-dot chain line. At this time, the movement amount D1 of the copying tooth 23 in the left direction in the drawing is the distance between the right end of the contact slope 23a of the copying tooth 23 and the left end of the contact slope 35a of the spacer 35 at the initial position. When the copying tooth 23 moves in the left direction of the drawing, the charge / discharge unit 20 and the charge / discharge probe 24 also move by the same length. That is, as shown in FIG. 5, the charging / discharging unit 20 is displaced relative to the charging / discharging jig 2 (specifically, the guide rod 14 or the like) by the movement amount D1 in the left direction of the drawing. As described above, in the present embodiment, the charging / discharging unit 20 is attached to the charging / discharging jig 2 by inserting the copying teeth 23 between the spacers 35 in a state where the contact slopes 23a and 35a are in contact with each other. On the other hand, it is displaced relatively to the left side of the drawing. As a result, the return spring 15 extends to the left by D1.

Here, as shown in FIGS. 6 and 8, D1 (the amount of movement of the charge / discharge probe 24) is the distance between the right end of the contact slope 23a of the copying tooth 23 and the left end of the contact slope 35a of the spacer 35 at the initial position. D1) is set to be larger than the distance D2 between the right end portion of the contact surface of the terminal 6 in the secondary battery 5 and the left end portion when the charge / discharge probe 24 is charged. In other words, when the copying tooth 23 and the spacer 35 are slid, the movement amount D1 of the charge / discharge probe 24, which is the extension of the return spring 15 in the left direction, is set to the right end of the terminal 6 and the charge / discharge probe. The secondary battery 5 is charged / discharged in a state where the distance D2 is larger than the distance D2 from the left end when 24 is charged.
Thereafter, the secondary battery 5 is repeatedly charged and discharged in that state.

  When the charging / discharging process is completed, the charging / discharging jig 2 is raised, the charging / discharging probe 24 of the charging / discharging unit 20 is separated from the terminals 6 constituting the positive electrode and the negative electrode of the secondary battery 5, and the copying teeth 23 are further formed. It is removed from the spacer 35 and returns to the initial position shown by the solid line in FIG. Thereby, the charging / discharging unit 20 that has moved during charging is pulled by the return spring 15 and returned to the original position shown in FIG.

  On the other hand, when an internal short circuit or overcharge occurs in the secondary battery 5 during the charge / discharge process and heat is generated, the copying teeth 23 formed of a POM material having low flame retardancy are softened as shown in FIG. However, its rigidity is reduced. For this reason, the charging / discharging unit 20 that has been positioned by inserting the copying teeth 23 between the spacers 35 causes the elastic force of the return spring 15 to reduce the arrow H2 in FIG. As shown in FIG. Then, when the copying tooth 23 returns to the initial position shown by the solid line in FIG. 6, the charge / discharge probe 24 moves to the right side of the drawing by the movement amount D1 as shown in FIG.

  That is, the charge / discharge probe 24 moves to the right side by the movement amount D1 of the charge / discharge probe 24, which is the extension of the return spring 15 in the left direction, so that the right side of the right end of the terminal 6 as shown in FIG. Will be moved to. In other words, the length D1 that is the extension of the return spring 15 in the left direction is set to be larger than the distance D2 between the right end portion of the terminal 6 and the left end portion when the charge / discharge probe 24 is charged. Thus, when the copying tooth 23 is softened and the length of the return spring 15 returns to the original state, the charge / discharge probe 24 moves to the right beyond the end of the terminal 6. As a result, as shown in FIGS. 7 and 8, the charge / discharge probe 24 of the charge / discharge unit 20 is separated from the terminals 6 constituting the positive electrode and the negative electrode of the secondary battery 5, so that the application of current in the secondary battery 5 is automatically performed. Can be stopped.

  As described above, according to the charging / discharging device 1 according to the present embodiment, when the secondary battery 5 is charged / discharged, the copying teeth 23 are inserted between the spacers 35 and the charging / discharging unit 20 is attached to the charging / discharging jig 2. On the other hand, the return spring 15 is extended by being displaced leftward. The leftward extension D1 of the return spring 15 is larger than the distance D2 between the right end of the contact surface of the terminal 6 and the left end of the charge / discharge probe 24. Accordingly, when the secondary battery 5 generates heat, the copying teeth 23 are softened, and the charging / discharging probe 24 is automatically separated from the terminal 6 by the elastic force of the return spring 15. It is possible to sufficiently prevent the secondary battery 5 from generating heat.

  In this embodiment, a POM material that is a low flame retardant material (the flame retardant grade is HB) is used as the material of the copying tooth 23, but the material of the copying tooth is a material that is easily softened at a high temperature. There is no problem if there is. For example, vinyl acetate, polystyrene, polyethylene, polypropylene, polymethyl methacrylate, polyester, or the like can be applied as the material for the copying tooth.

  Next, with reference to FIG. 9 to FIG. 11, a schematic configuration of the charge / discharge device 100 which is the second embodiment of the charge / discharge device according to the present invention will be described. About the charging / discharging apparatus 100 demonstrated by this embodiment, about the structure similar to the charging / discharging apparatus 1 which concerns on said 1st embodiment, the same code | symbol is attached | subjected, the description is abbreviate | omitted, and it demonstrates centering on a different structure. .

  The charging / discharging device 100 according to the present embodiment includes a driving device 101 that moves the charging / discharging jig 2 in the horizontal direction together with a lifting / lowering device (not shown) that moves the charging / discharging jig 2 up and down.

  When the charging operation is performed by the charging / discharging device 100 of the present embodiment, after the secondary battery 5 is set on the battery pallet 3 as in the first embodiment, the charging operation is performed as indicated by an arrow B1 in FIG. The discharge jig 2 is lowered. In the present embodiment, the copying teeth 123 formed of a POM material having low flame retardancy are disposed almost directly between the spacers 35. For this reason, when the charging / discharging jig 2 is lowered, the copying teeth 123 are inserted and positioned between the spacers 35 as shown in FIG. At this time, each charge / discharge probe 24 comes into contact with the terminal 6 constituting the positive electrode and the negative electrode of the secondary battery 5.

  Thereafter, the driving device 101 is driven to move the charging / discharging jig 2 to the right side as indicated by an arrow B2 in FIG. At this time, since the charging / discharging unit 20 and the charging / discharging probe 24 are positioned by the copying teeth 123, only the base 11, the vertical plates 12, 13, and the guide rod 14 move to the right side. That is, as shown in FIG. 10, the charge / discharge unit 20 and the charge / discharge probe 24 are displaced relative to the charge / discharge jig 2 (specifically, the guide rod 14 or the like) in the left direction of the drawing. Accordingly, as shown in FIG. 11, the return spring 15 extends in the left direction with respect to the charge / discharge jig 2.

  At this time, the amount of movement of the charging / discharging unit 20 and the copying teeth 123 in the right direction in the drawing is the same as that of the first embodiment in the right end portion of the contact surface of the terminal 6 in the secondary battery 5 and the charging / discharging probe 24. Is set to be larger than the distance to the left end during charging. In other words, when the charge / discharge jig 2 is moved horizontally to the right side of the drawing, the relative movement amount of the charge / discharge probe 24, which is the extension of the return spring 15 in the left direction, is expressed as the right end of the terminal 6. The secondary battery 5 is charged / discharged in a state where the distance is larger than the distance between the left and the left end portions during charging of the charging / discharging probe 24.

  Also in the present embodiment, when the secondary battery 5 generates heat due to an internal short circuit or overcharge during the charging / discharging process, the copying teeth 123 formed of the POM material having low flame resistance are softened. , Its rigidity decreases. For this reason, the charge / discharge unit 20 and the charge / discharge probe 24 which are positioned by inserting the copying tooth 123 between the spacers 35 are drawn by the elastic force of the return spring 15 as the copying tooth 123 is lowered in rigidity. It is drawn to the right side.

  That is, the charge / discharge probe 24 moves to the right side of the right end portion of the terminal 6 by moving to the right side by the amount of movement of the charge / discharge jig 2 that is the extension of the return spring 15 in the left direction. Become. In other words, by setting the length, which is the extension of the return spring 15, larger than the distance between the right end of the terminal 6 and the left end of the charge / discharge probe 24 during charging, the copying tooth 123 is When the length of the return spring 15 returns to the original state after being softened, the charge / discharge probe 24 moves to the right side beyond the end of the terminal 6. Thereby, since the charging / discharging probe 24 of the charging / discharging unit 20 separates from the terminal 6 which comprises the positive electrode and negative electrode of the secondary battery 5, application of the electric current in the secondary battery 5 can be stopped automatically.

  As described above, also in the charging / discharging device 100 according to the present embodiment, when the secondary battery 5 generates heat, the copying teeth 123 are softened and the charging / discharging probe 24 is automatically moved by the elastic force of the return spring 15. By adopting a configuration in which the terminal 6 is separated from the terminal 6, heat generation of the other secondary battery 5 can be sufficiently prevented.

DESCRIPTION OF SYMBOLS 1 Charging / discharging apparatus 5 Secondary battery 6 Terminal 15 Return spring 20 Charging / discharging unit 23 Copy tooth 24 Charging / discharging probe 35 Spacer

Claims (3)

A plurality of secondary batteries are stacked in a thickness direction and arranged on a battery pallet, and a charge / discharge probe provided on a charge / discharge jig on a contact surface formed on a positive electrode terminal and a negative electrode terminal of each of the secondary batteries. A charge / discharge device for charging and discharging the secondary battery,
A spacer for holding the plurality of secondary batteries in a state of being sandwiched one by one in the stacking direction;
A plurality of charge / discharge units that are slidable in the stacking direction of the secondary battery and are attached to the charge / discharge jig by being connected by a return spring; and
The charge / discharge probe is provided with a predetermined number for each of the plurality of charge / discharge units, corresponding to the secondary battery,
The charging / discharging unit includes a copying tooth formed of a low flame retardant material, which is inserted between the spacers and performs positioning with respect to the secondary battery.
When charging and discharging the secondary battery,
The copying teeth are inserted between the spacers, and the return spring is extended by displacing the charge / discharge unit relative to the charge / discharge jig in one direction in the stacking direction, thereby returning the return spring. The extension of the spring in the laminating direction is larger than the distance between the one-direction opposite end portion of the contact surface and the one-direction end portion of the charge / discharge probe. A charge / discharge device. Opposing contact slopes are formed at the respective leading ends of the copying tooth and the spacer,
By sliding the contact slopes in contact with each other and inserting the copying teeth between the spacers, the charge / discharge unit is unidirectional in the stacking direction with respect to the charge / discharge jig. The charging / discharging device according to claim 1, wherein the charging / discharging device is relatively displaced.   After the copying teeth are inserted between the spacers, the charge / discharge jig is displaced in a direction opposite to the one direction, thereby moving the charge / discharge unit toward the one direction side with respect to the charge / discharge jig. The charging / discharging device according to claim 1, wherein the charging / discharging device is relatively displaced.

Images