JP2001291531A - Charging and discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to charge and discharge normally by reducing the contact resistance of probe tip with the electrode of a battery when charging and discharging the battery in a tray. SOLUTION: An upper probe holder 10 moves up and down, and an upper prove 4 and a press down bar 26 is mounted on it. On the other hand, a guide post 22 is fixed to a device, and a bottom probe holder 20 wherein a bottom probe 3 is mounted is fixed to the guide post 22. Further, a tray installation plate 24 moves up and down along the guide post 22. Prior to the charging and discharging, an upper probe holder 10 descends, and finally the tray installation plate 24 is stuck to the bottom probe holder 20. At this time, both probes 3, 4 let a battery 2 inside a tray 1 float from the bottom surface of a recess to let the battery 2 stand straight. If charging and discharging is performed in this state, the entire surface of the spike of the probe tip is abutted on an electrode of the battery, and a contact resistance will almost disappear enabling to carry out charging and discharging normally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rechargeable Ni battery.
The present invention relates to a charge / discharge device for a secondary battery such as a Cd battery or a lithium battery.

[0002]

2. Description of the Related Art Recently, with the rapid spread of electronic devices such as mobile phones and computers, secondary batteries have been widely used. These batteries have a square or round shape, and a plate-like positive electrode plate and a negative electrode plate are inserted or wound in a metal case having such a shape with a separator interposed therebetween. A negative electrode is connected to the bottom of the metal case, and a positive electrode is connected to a convex portion on the upper surface insulated from the metal case. These are insulated from each other to form a lower electrode (negative electrode) and an upper electrode (positive electrode). The metal case is filled with a predetermined amount of an electrolyte and is sealed. The electrolyte contained therein undergoes a chemical reaction with both electrodes to be charged and discharged, thereby exhibiting a function as a battery.

[0003] One of the most important performances of a battery is the current capacity at the time of discharging. In a product of the same standard, the variation in the current capacity is as small as possible, and the variation must be within the standard. Therefore, the completed battery is
All electrical properties are measured and defective products are eliminated there.

For example, in measuring the current capacity at the time of discharge of a battery, prior to the start of discharge, for example, constant current charging and constant voltage charging are performed so that the voltage across the battery is maintained at a constant voltage. At the same time, a discharge circuit is connected to the battery so that a constant current flows from the battery, and the discharge measurement is terminated when the voltage across the battery falls below a specified level. During these measurements, a probe is pressed against both electrodes of the battery, and discharge is performed via the probe.

FIG. 7 shows the state at that time. This is a front view partially drawn in cross section. (A) The tray 1 has a recess slightly larger than the external dimensions of the battery 2, into which the battery 2 is inserted and set upright. (B) Then, the lower probe 3 from below and the upper probe 4 from above through a through hole provided in the recess.
Contact the negative electrode and the positive electrode of the battery 2 respectively. At this time, the battery 2 is held down by the upper probe 3 and remains in the recess. Although the drive mechanism is not shown, both probes 3 and 4 operate in the vertical direction. Here, the probe has a built-in compression spring, and its tip expands and contracts when it comes into contact with the battery 2. The probes 3 and 4 are connected to the battery 2 with a spring force corresponding to the amount of expansion and contraction.
Is to press. Further, the tip of the probe is sharply pointed, and the measurement is performed with the probe slightly biting into the electrode surface with which the probe comes into contact. In the case of the battery 2 measuring device,
As the tip shape of the probe, a spike shape as shown in FIG. 7 is generally used. The tips of a number of sharp spikes are coplanar and regularly provided.

The rear end of the probe is connected to a charge / discharge measurement unit by a cable or the like, and can perform charge / discharge and various measurements. FIG. 7 shows a state in which one battery 2 is measured. However, in practice, a number of recesses are provided on the same tray 1, and the batteries 2 are set in these recesses, and the probes 3 and 3 are individually provided. The charging / discharging is performed while the abutment 4 contacts. The number of batteries is in the form of a batch process (a process in which a large number of batteries are performed on the same tray at a time) of several hundred cells / tray, and a set of trays in which the batteries 2 are set in the recesses in advance is measured. , And probes 3 and 4 provided for each battery 2 of the measuring device perform charging and discharging while abutting on each battery.

[0007]

However, the above-described conventional charge / discharge device has the following problems. First, there is a problem due to the dimensional accuracy of the tray recess. The tray 1 is generally made of a plastic molded product because of its low manufacturing cost, small weight and easy handling. For this reason, the processing accuracy of the recess was not high. Often, the bottom surface is not horizontal, the perpendicularity between the bottom surface and the side surface is weak, and a minute R is generated at the boundary between the two.

Therefore, if the bottom surface of the recess is not horizontal, the bottom surface of the battery is not horizontal. On the other hand, since the probe operates in the vertical direction when charging and discharging, only a part of the spike at the tip of the lower probe 3 contacts the bottom surface of the battery when the probe contacts the battery, as shown in FIG. (FIG. 8 is an enlarged front view). In the same manner, on the positive electrode side, only a part of the spike at the tip of the upper probe 4 comes into contact with the positive electrode. In addition, even when there was a minute R at the boundary between the bottom surface and the side surface of the concave portion, the battery 2 set in the concave portion got on the battery, and the bottom surface of the battery 2 was not horizontal.

Next, consider a problem in the case where the perpendicularity between the bottom surface and the side surface of the concave portion is small. If the width of the concave portion is too large compared to the width of the battery 2, the battery 2 set therein will be loose and hinder the transportation. In addition, many of the prismatic batteries have an elongated positive electrode and a small width, and in this case, if the battery 2 is set with a slight displacement, the positive electrode will not contact the upper probe 4. Therefore, in order to avoid such a problem, the dimensions of the concave portion of the tray 1 are matched to the external dimensions of the battery as much as possible, so that there is no play between the two as much as possible. That is, the battery 2 is almost positioned by the side surface of the concave portion. Therefore, when the side surface is formed to be slightly inclined with respect to the vertical plane, the battery 2 is set in accordance with the side surface, and the bottom surface of the battery 2 is not horizontal accordingly. As a result, in this case as well, only a part of the spike at the tip of the lower probe 3 comes into contact with the bottom surface of the battery 2 as shown in FIG.

In any of the above cases, not all of the spikes at the tip of the probe come into contact with the electrodes, so that the contact resistance increases, which causes a variation in the measured value.

Next, FIG. 9 shows a general charging characteristic curve of the battery. In this method, the charge is measured by the probe while the probe is in contact with the electrode and charging is performed. This shows a change in the amount of charge over about 8 hours. In a normal state, what is charged like curve A sometimes becomes like curve B or curve C. That is, in a normal state, the amount of charge increases while drawing a parabola with the passage of time, saturates at a certain value, and reaches an equilibrium state. However, in the case of an abnormality, the increase stops below a certain value, or conversely, it suddenly increases halfway and then saturates. The causes of these problems include variations in the amount of electrolyte injected into the battery and variations in the distance between the positive electrode plate and the negative electrode plate. Was a major factor.

That is, as shown in FIG. 8 described above, if only a part of the spike at the tip of the probe abuts on the electrode,
The contact resistance was increased, and the charging characteristics were as shown in curve B.

[0013] Therefore, as described above, it is necessary to normally charge and discharge the individual batteries in a state where the contact resistance is as small as possible. In addition, in order to meet the rapidly increasing demand in recent years and to reduce product costs, batteries must be manufactured in a method suitable for mass production, and charge / discharge characteristics must be inspected. The batch process described above is the preferred method. Therefore, in batch processing, it is desirable that charging and discharging be performed while all of the batteries are in normal contact with the probe (in a state where the contact resistance is small).

[0014]

In order to achieve the above object, the present invention uses the following structural means. First,
The battery is installed with two electrodes vertically in the recess of the tray,
The recess is provided with a through hole through which the lower probe can move vertically from below. During measurement, the battery is sandwiched between an upper probe that vertically contacts the upper electrode of the battery and a lower probe that passes through the through-hole and contacts the lower electrode of the battery vertically from below. The lower surface is separated from the bottom surface of the concave portion. As a result, the battery which was initially inclined depending on the shape of the concave portion is set upright, and the probe is normally brought into contact with the electrode of the battery.

In the measurement, the upper probe contacts the upper electrode of the battery, and then the lower probe contacts the lower electrode of the battery, and the lower surface of the battery separates from the bottom surface of the recess. It is a structure to do. For this reason, the battery can be charged and discharged without falling into the recess of the tray or jumping out of the recess.

More specifically, the lower probe holder on which the lower probe is installed, the tray, and the upper probe holder on which the upper probe is installed are parallel to each other, and the tray is located between the lower probe holder and the upper probe holder. Is arranged. Here, the lower probe holder is fixed and does not move up and down, but the tray and the upper probe holder move up and down. In addition, the tray is constantly pushed up to the top dead center by the upward biasing means. During measurement, as the upper probe holder descends, the upper probe contacts the upper electrode of the battery installed in the recess of the tray. Contact, then the upper probe holder pushes down on the tray. Thereafter, the lower probe comes into contact with the lower electrode of the battery, and the lower surface of the battery separates from the bottom surface of the concave portion.

Note that the tray has a plurality of recesses for installing batteries, and the upper probe holder and the lower probe holder are provided with an upper probe and a lower probe that are in contact with the respective batteries. It can be charged and discharged in the tray.

In addition, a plurality of sets of the tray, the upper probe holder, and the lower probe holder having the above configuration are arranged in the vertical direction, and the plurality of upper probe holders are lowered by one driving means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a charge / discharge device according to the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view showing how a battery is set on a tray. 2 and 3 are front views of the charge / discharge device of the present invention, respectively, and are partially drawn. Here, FIG. 2 shows a state before charging and discharging, and FIG. 3 shows a state during charging and discharging. 4 to 6 are partially enlarged views showing changes from before the measurement to during the measurement in three distinctive manners.

[0020]

Embodiment 1 First, as shown in FIG. 1, a battery 2 is set on a tray 1 with its positive electrode facing upward. The batteries 2 are set one by one in a concave portion on the bottom surface of the tray 1. The recess is provided with a through hole. Thus, the tray 1 in which the battery 2 is set in a predetermined amount is next set in the charging / discharging device.

Turning to FIG. The tray 1 on which the batteries 2 are set is fixed to the tray mounting plate 24 (details of the fixing method are not shown). First, the structure and movement of each part will be described with reference to FIG. The upper probe holder 10 is for moving the upper probe 4 up and down. The upper probe 4 is fixed to the upper probe holder 10 via the upper probe mounting plate 11. The attached upper probes 4 are installed vertically so as to contact the positive electrode of the battery 2. Although not shown, cables are connected to the upper ends of the upper probes 4, respectively, which are connected to a charge / discharge measurement unit. Also, the mechanism by which the upper probe holder 10 moves up and down
It is as follows. The upper probe holder 10 is held by a holder fixing ring 12 so that a vertically standing slide shaft 13 is provided.
Is fixed at a predetermined position. The lower end of the slide shaft 13 is fixed to a vertically moving plate 14 by bolts, and the upper end is fixed to a top plate or the like (not shown), and the slide shaft 13 moves up and down without being twisted. Here, the vertically moving plate 14 is fixed to an air actuator 15 such as an air cylinder, and moves up and down as it moves in and out. Further, a fixing plate 18 is mounted on a gantry 17 fixed to a fixing surface of the apparatus, and a slide shaft 13 slides up and down with respect to a slide bush incorporated therein. And the upper probe holder 1
0, the tray positioning pin 27 and the push-down bar 26
, Respectively, are fixed by protruding a plurality of them downward.

About Lower Probe Holder 20 This holds a lower probe mounting plate 21. Built-in slide bush (not shown), guide post 2
2, but the height position is determined by the lower stopper 23 fixed to the guide post 22. Here, the guide post 22 has a bottom surface fixed to the fixing plate 18 and does not move, and a portion near the upper end thereof is fixed to a fixing frame or the like of the apparatus (not shown), and is always kept vertical.
The lower probe mounting plate 21 is provided with a plurality of lower probes 3. Here, the plurality of lower probes 3 are installed in the vertical direction so as to contact the negative electrode (center portion) of the battery 2. Although not shown, cables are connected to the lower ends of the lower probes 3, respectively, which are connected to a charge / discharge measurement unit.

The tray setting plate 24 moves up and down while the tray 1 is placed on the plate. Like the lower probe holder 20, the slide bush is built in (not shown) and slides along the guide post 22. When the tray 1 is set, a through hole is also formed in the tray mounting plate 24 so as to correspond to the through hole in the concave portion of the tray 1. Here, between the tray installation plate 24 and the lower probe holder 20,
A compression spring 25 is fitted around the guide post 22. The compression spring 25 always lifts the tray mounting plate 24, and when a force is applied from above, the tray mounting plate 24 is lowered by that amount. The lower probe holder 20 has a counterbore around the guide post 22, and a part of the compression spring 25 enters into the counterbore.

Here, the guide post 22 is fixed without moving. Also, upper probe holder 1
0 moves up and down as the air actuator 15 moves in and out. At this time, the upper probe holder 10 has a relief hole at a portion where the guide post 22 passes, and the guide post 22 does not hinder the upper probe holder 10 from moving up and down. At the same time, the up-and-down moving plate 14 also has a relief hole in the portion where the pedestal 17 passes, and can move up and down without any trouble.

Next, a more detailed description will be given with reference to FIGS. (See also FIGS. 1 and 2 at the same time.) The state of FIG. 4 is a state in which the tray 1 on which the batteries 2 are set is set on the tray installation plate 24. The tray mounting plate 24 is at a position lifted up by a compression spring 25, and both the upper probe 4 and the lower probe 3 are far away from the electrodes of the battery 2. Here, the tray positioning pins 27 do not come into contact with the tray 1,
It is located above it. When the tray 1 is set, the tray 1 is provided with a pin insertion hole 28 corresponding to the position of each tray positioning pin 27. The hole diameter of the pin insertion hole 28 is
Is slightly larger than the outer diameter of. Similarly, the press-down bar 26 is located above the tray setting plate 24 without contacting the tray setting plate 24.

FIG. 5 state: When the air actuator 15 operates, the slide shaft 13 descends, and the upper probe holder 10 descends accordingly. Then, the tray positioning pin 27 is inserted into the pin insertion hole 28 provided at a predetermined position on the tray 1. Immediately after the tray 1 learns from the tray positioning pins 27, the upper probe 4 hits the positive electrode of the battery 2, and the upper probe 4 presses the battery 2 from above with a built-in compression spring. Normally, the set tray is positioned at a level that does not cause any problem, but this allows more accurate positioning. The tip of the push-down bar 26 is located on the tray setting plate 24.
Contact However, the tray mounting plate 24 has not yet begun to descend. The figure shows this state. In this state, as described above, the battery 2 is slightly inclined because the concave portion of the tray 1 has a non-horizontal bottom surface or a minute R at the boundary between the bottom surface and the side surface. Therefore, there is a large possibility that the entire spike at the tip of the upper probe 4 is not in contact with the positive electrode of the battery 2 (because of the fineness, FIG.
Is difficult to recognize).

State of FIG. 6... The air actuator 15 operates as it is, and the upper probe holder 10 continues to descend. Then, the push-down bar 26 pushes down the tray installation plate 24, and finally, the tray installation plate 24 comes into close contact with the lower probe holder 20 and stops. At this time, the compression spring 25 contracts and enters the counterbore. The figure shows this state. In this process, first, the lower probe 3 hits the negative electrode (bottom surface) of the battery 2, and then the lower probe 3 lifts the battery 2. And as shown
The bottom surface of the battery 2 is separated (floated) from the bottom surface of the concave portion. At this time, the battery 2 is supported between the probes 3 and 4. Therefore, both poles of the battery 2 are in contact with the entire tip of the spike of both probes 3 and 4 (this is also fine, so it is difficult to recognize in FIG. 6). This is possible because both probes 3, 4 are installed vertically. At this time, of course, the bottom surface of the battery 2 only needs to slightly float from the concave portion. On the contrary, if the battery 2 floats too much and the bottom surface of the battery 2 protrudes from the recess, nothing happens. Charge and discharge are performed in this state. FIG. 3 shows the overall situation at this time. At this time, all the batteries 2 in the tray 1 are supported by being sandwiched between the probes 3 and 4, with the bottom surface thereof separated from the concave portion of the tray 1.

Referring again to FIGS. 4 to 6, the relationship between the spring load built into the probe and the spring strength of the compression spring 25, the length of the probe, the length of the tray positioning pin 27, and the length of the push-down bar 26 will be described. Note the relationship between lengths. In FIG. 4, the compression spring 25 needs to have such a strength that the relationship shown in the figure is maintained even when the set of trays 1 containing the batteries 2 is set. In FIG. 5, immediately after the tray positioning pin 27 is lowered and inserted into the pin insertion hole 28 of the tray 1, the upper probe 4 hits the positive electrode of the battery 2 and bends upward slightly. Set the length in advance.
At this time, the length of the push-down bar 26 is set so that the tip of the push-down bar 26 contacts the tray installation plate 24. By doing so, before the upper probe 4 hits the positive electrode of the battery 2, the tray 1 is positioned following the tray positioning pins 27, so that each upper probe 4 can be accurately applied to the positive electrode of the battery 2. Also,
Since the upper probe 4 holds down the battery 2, when the battery 2 is later pushed up from below by the lower probe 3, the battery 2 is greatly inclined or protrudes from the concave portion, and the upper probe 4
Does not lose contact with the positive electrode of the battery 2. In FIG. 6, when the tray mounting plate 24 descends and comes into close contact with the lower probe holder 20, all the batteries 2 in the tray 1 must be lifted from the recess by the lower probe 3. Therefore, the spring strength of the lower probe 3 needs to be larger than the spring strength of the upper probe 4. Further, it is necessary that the two probe mounting plates 11 and 21 to which both the probes 3 and 4 are mounted have a strength that does not bend even in the state shown in the figure. In addition, as for the compression spring 25, when it contracts, it must be fitted in the counterbore of the lower probe holder 20 as shown in the figure, so that the tray mounting plate 24 and the lower probe holder 20 need to be in close contact with each other. This is because the absolute height of the tray 1 and thus the battery 2 is firmly determined by the close contact, so that all the batteries 2 can be floated without fail.

Therefore, when charging / discharging different types of batteries, the length of the probe, the length of the tray positioning pin 27 or the length of the push-down bar 26 is taken into account, taking into account the new height relationship of the batteries and the tray. And the spring strength of the probe and the compression spring 25 must be determined. here,
The results of experiments performed by the inventor using a prototype are described.・ Battery: One battery weighing 30 to 40 g is set in 150 / one tray. Probe: Upper probe: Shrinkage amount is about 3 mm, and at that time, a spring load of about 500 g / piece. Lower probe: The amount of shrinkage is about 3 mm, and at that time, a spring load of about 600 g / piece. -The flying height of the battery: 2-3 mm. When charging and discharging were performed under the conditions, all batteries could be charged and discharged without any problem. For example, the charging characteristic curve is the curve A in FIG. 9 described above, and the variation is sufficiently within the standard range.

[0030]

[Embodiment 2] Although the embodiments described so far have been devices for charging and discharging a large number of batteries set in one tray without any trouble, in the next embodiment 2, a plurality of the above trays are set. And a device for simultaneously charging and discharging all the batteries therein.

Although this is not shown in its entirety, it will be described with reference to FIG. The features of the second embodiment are as follows. -Upper probe holder 1 having the relationship shown in Fig. 2
0, a combination of three tray mounting plates 24 and a lower probe holder 20 are stacked in a plurality of stages upward. The upper probe holder 10 is fixed at regular intervals to the slide shaft 13 extending long upward. Similarly, the lower probe holder 20 is fixed to the elongated guide post 22 at regular intervals. In addition, a tray mounting plate 24 is fitted into the guide post 22.

Therefore, when the air actuator 15 operates and the vertically moving plate 14 moves down, the plurality of upper probe holders 1 fixed to the slide shaft 13 at regular intervals are provided.
0 all fall at the same time. Then, finally,
As described in the first embodiment, all the batteries 2 in each tray 1 float vertically while being sandwiched between the upper and lower probes 3 and 4, and can be normally charged and discharged. However,
In this case, the various holders 10 and 20 and the plate 14
The guide post 22, the slide shaft 13, and the slide shaft 13 need to be designed to have strength enough to withstand the operation.

The second embodiment has the following effects. The tray 1 on which the batteries 2 are set is sequentially set on the tray installation plate 24 of each stage, and one air actuator 15
By simply operating, all the batteries 2 can be charged and discharged normally, the structure is very simple, and the manufacturing cost of the device can be kept low. The inventor prototyped and experimented with a charging / discharging device having four upper and lower stages, and was able to charge / discharge all the batteries 2 without any problem. At this time, the number of batteries stored in one tray, the load of the probe, and the flying height of the batteries are the same as those in the prototype described in the first embodiment.

Finally, some points are added. In the embodiments described above, the apparatus is illustrated in a front view, and only two guide posts and two slide shafts are illustrated. However, this should be designed according to the size and weight of the tray. The various holders must move up and down smoothly, and it is usually desirable to arrange the slide shafts at four places outside the four corners of the tray installation plate. It is also desirable that guide posts be provided at four locations in the same manner. In addition, when it comes to the push-down bar, it should be located in the middle (in FIG. 1, in the direction perpendicular to the plane of the paper) of the two guide posts. This is because, by arranging it in the middle position, the push-down bar can push down the tray mounting plate without difficulty (without prying).

In the embodiment, the upper and lower drive mechanisms are pneumatic actuators, but this can be changed to another drive mechanism such as a motor. In such a case, the force may be excessively applied at the time of lowering, so when a force of a certain value or more is applied, a clutch or the like is added to shut down the lowering force so as not to apply a load on the vertically moving plate any more. Better.

The tray is represented by a plastic molded product, but may be made of other nonmetallic materials (insulating materials). Even if the above-mentioned drawbacks occur in the shape of the trays during the molding process or the manufacturing process, the charging / discharging device of the present invention has the same configuration as that of the plastic tray described above. The effect of can be exhibited.

In the above description, the battery is set in the tray with the positive electrode facing upward, but the battery may be set with the positive electrode facing downward. If the directions of the batteries in the same tray are all aligned, the same effect can be achieved.

[0038]

As described above, according to the charging / discharging apparatus of the present invention, even if a tray which is somewhat difficult to mold is used, the battery in the charging / discharging apparatus is sandwiched between the upper and lower sides by the probe during charging / discharging. Lifting the battery. Therefore, even if the battery is slightly tilted at first, the battery stands upright, and the upper and lower poles of the battery hit the entire surface of the spike at the tip of the probe. Therefore, the contact resistance between the electrode and the probe does not increase, and the battery can be charged and discharged normally.

Further, by operating only one driving mechanism, for example, an air actuator, a large number of batteries in the tray can be normally charged and discharged. In addition, the trays can be set in multiple stages, and even in this case, all the batteries in each tray can be simultaneously and normally charged and discharged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which batteries are arranged in a tray.

FIG. 2 is a front view (partially sectional view) showing the entire charge / discharge device of the present invention.

FIG. 3 is a front view (partially sectional view) showing the entire charge / discharge device of the present invention when charging / discharging is being performed.

FIG. 4 is a partially enlarged front view showing a state when a tray is set in the charge / discharge device of the present invention.

FIG. 5 is a partially enlarged front view showing a state when the device is driven and the push-down bar contacts the tray installation plate in the charging / discharging device of the present invention.

FIG. 6 is a partially enlarged front view showing a state when charging / discharging is performed in the charging / discharging device of the present invention.

FIG. 7 is a partially enlarged view showing a relationship between a battery and a probe in a conventional charge / discharge device.

FIG. 8 is a partially enlarged view showing a state in which the battery is tilted and only a part of the spike at the tip of the probe is in contact with the electrode in the conventional charge / discharge device.

FIG. 9: Charging characteristic curve of a battery

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tray 2 Battery 3 Lower probe 4 Upper probe 10 Upper probe holder 11 Upper probe mounting plate 12 Holder fixing ring 13 Slide shaft 14 Vertical movement plate 15 Air actuator 17 Mounting stand 18 Fixed plate 20 Lower probe holder 21 Lower probe mounting plate 22 Guide post 23 Lower stopper 24 Tray setting plate 25 Compression spring 26 Push-down bar 27 Tray positioning pin 28 Pin insertion hole

Claims (5)

[Claims] 1. A charging / discharging device in which a measurement probe is brought into contact with each electrode on the upper and lower surfaces of a battery, wherein the battery is provided with electrodes on the upper and lower surfaces arranged vertically in a concave portion of a tray, and the concave portion has a lower side and a lower side. A through hole is provided in which the probe can move up and down in the vertical direction. During measurement, the battery is connected to an upper probe that contacts the upper electrode of the battery in a vertical direction from above and a battery that passes through the through hole and extends in a vertical direction from below. A charge / discharge device, wherein the lower surface of the battery is separated from the bottom surface of the concave portion by being sandwiched between a lower probe contacting a lower electrode. 2. During measurement, the lower probe contacts the upper electrode of the battery, and then the lower probe contacts the lower electrode of the battery. The charging / discharging device according to claim 1, wherein the charging / discharging device is separated from the charging / discharging device. 3. The lower probe holder on which the lower probe is installed, the tray and the upper probe holder on which the upper probe is installed, and the lower probe holder and the upper probe holder are arranged in parallel. The tray is arranged therebetween, the lower probe holder is fixed, the tray and the upper probe holder move up and down, and the tray is pushed up to a top dead center by an urging means upward, At the time of measurement, with the lowering of the upper probe holder, the upper probe comes into contact with the upper electrode of the battery installed in the recess of the tray, and the upper probe holder pushes down the tray, and then the lower probe is The charging device according to claim 2, wherein the lower surface of the battery is separated from the bottom surface of the concave portion while being in contact with a lower electrode of the battery. Collector. 4. The tray has a plurality of recesses for installing the batteries, the upper probe holder has a plurality of upper probes vertically above upper electrodes of a plurality of batteries installed in the recesses, 4. The charge / discharge device according to claim 3, wherein the lower probe holder has a plurality of lower probes vertically below lower electrodes of a plurality of batteries installed in the recess. 5. A plurality of sets of the tray, the upper probe holder, and the lower probe holder configured as in claim 4 are arranged in a vertical direction, and the plurality of upper probe holders are driven by one driving means. A charge / discharge device characterized by descending.