JP2022178211A - Secondary battery charging/discharging test device - Google Patents

Abstract

To provide a secondary battery charging/discharging test device capable of conducting a charging/discharging test of a plurality of secondary batteries with a test device having a simple structure by precisely controlling a temperature of each of the secondary batteries.SOLUTION: A secondary battery charging/discharging test device 1 according to the present invention is configured to charge/discharge a plurality of secondary batteries 9 and evaluate the performance of the secondary batteries 9, and includes a battery holder 8 that houses the plurality of secondary batteries 9, and a heat exchange plate 2 through which a heat medium subjected to temperature control is circulated. The battery holder 8 is attachably/detachably mounted on the heat exchange plate 2, and temperatures of the secondary batteries 9 in the battery holder 8 are controlled, with heat of the heat exchange plate 2, to a prescribed temperature.SELECTED DRAWING: Figure 1

Description

The present invention relates to a secondary battery charge/discharge test apparatus.

2. Description of the Related Art Conventionally, there is known a secondary battery charge/discharge test apparatus that performs a charge/discharge test by housing a secondary battery in a constant temperature bath (see Patent Document 1, for example).

In addition, a Peltier element is provided on the heat exchange plate through which the heat medium flows, the secondary battery is brought into contact with the Peltier element, and the charge/discharge test of the secondary battery is performed while controlling the temperature of the secondary battery by controlling the Peltier element. A secondary battery charge/discharge test device is known (see, for example, Patent Document 2).

Japanese Patent No. 5738660 JP-A-2005-257372

Conventional secondary battery charge/discharge test equipment using a constant temperature bath performed charge/discharge tests by energizing multiple secondary batteries placed together in the constant temperature bath. Since the temperature was not controlled, test data with sufficiently high accuracy could not be obtained.

In a charge/discharge test device using a Peltier element, a Peltier element is attached to a heat exchange plate to adjust the final temperature of one secondary battery. Couldn't do the test.

In view of the above points, the present invention provides a secondary battery charging device in which the temperature of each of a plurality of secondary batteries is properly controlled and a charge/discharge test can be performed on a plurality of secondary batteries with a test apparatus having a simple structure. An object of the present invention is to provide a discharge test device.

In order to achieve the above object, the secondary battery charge/discharge test device of the present invention includes:
In a secondary battery charging/discharging test device for charging and discharging a plurality of secondary batteries to evaluate the performance of the secondary battery,
a battery holder for storing a plurality of secondary batteries in parallel;
a heat exchange plate through which a temperature-controlled heat medium circulates;
with
The battery holder is detachably attached to a heat exchange plate, and the temperature of the secondary battery in the battery holder is adjusted to a predetermined temperature by heat from the heat exchange plate.

According to the present invention, since the temperature of the heat exchange plate is controlled by the heat medium, the temperatures of the plurality of secondary batteries stored in parallel in the battery holder can be controlled simultaneously via the heat exchange plate. The temperature of each of the secondary batteries is properly controlled, and charge/discharge tests can be performed with a test device of a simple structure in which a plurality of secondary batteries can be freely attached and detached.

Moreover, in the present invention,
It is preferable that the battery holder includes a plurality of types of battery holders provided with spaces for accommodating the secondary batteries according to the shape of the batteries to be accommodated.

According to this configuration, the battery holders are provided with a plurality of types of battery holders provided with spaces for accommodating the secondary batteries according to their shapes. It can be fixed detachably, and plural types of secondary batteries can be dealt with simply by exchanging the battery holder, so that versatility can be enhanced.

Moreover, in the present invention,
It is preferable that the battery holder has a storage portion from which the electrodes of the stored secondary battery are exposed.

With such a configuration, the electrode of the secondary battery can be exposed from the battery holder.

Further, in the present invention, it is preferable that terminals for charging and discharging are provided to be freely connectable to the electrodes of the secondary battery housed in the battery holder when the battery holder is attached to the heat exchange plate.

According to such a configuration, since the electrodes of the secondary battery are exposed from the battery holder, a configuration is realized in which the charging/discharging terminal can be connected. Also, if a secondary battery is mounted on the battery holder, the charging/discharging terminals can be connected to the electrodes of the secondary battery.

Moreover, in the present invention, it is preferable that the heat exchange plates are arranged side by side in the vertical direction.

According to this configuration, since the heat exchange plates are arranged vertically, the surfaces of the heat exchange plates are aligned vertically, and the work of fixing the battery holders to the heat exchange plates can be done from one direction, which is convenient. Become.

Moreover, in the present invention, it is preferable that a support portion for supporting a plurality of the heat exchange plates is provided, and the heat exchange plates are supported on front and back sides of the support portion.

According to such a configuration, since the heat conversion plates can be attached to the front and back of the supporting portion, it is possible to effectively utilize the installation space and test a large number of secondary batteries with a compact device.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the secondary battery charging/discharging test apparatus of embodiment of invention. The perspective view which shows the back side of the secondary battery charging/discharging test apparatus of this embodiment. Explanatory drawing which shows the state which decomposed|disassembled the battery holder of this embodiment. FIG. 2 is an explanatory diagram showing a connection state between electrodes and charge/discharge terminals of the secondary battery of the present embodiment. FIG. 2 is an explanatory diagram showing a heat medium circulation circuit according to the present embodiment; FIG. 5 is an explanatory diagram showing a heat medium circulation circuit according to another embodiment of the invention; Explanatory drawing which shows the other battery holder of this embodiment. Explanatory drawing which shows the battery holder and secondary battery of FIG. Explanatory drawing which shows the other battery holder of this embodiment. FIG. 10 is an explanatory view showing the battery holder and the secondary battery in FIG. 9;

A secondary battery charge/discharge test apparatus according to an embodiment of the invention will be described with reference to the drawings. 1 and 2, the secondary battery charge/discharge test apparatus 1 of the present embodiment tests various secondary batteries such as a lithium ion battery, a nickel metal hydride battery, and a nickel battery by a cycle test in which charging and discharging are repeated.・Evaluates the charge/discharge characteristics of cadmium batteries.

A secondary battery charge-discharge test apparatus 1 of this embodiment includes a fixing plate 3 to which a heat exchange plate 2 is fixed, a frame 4 (supporting portion) that supports the front and back of the fixing plate 3 by aligning the fixing plate 3 in the vertical direction, A circulating water tank 5 capable of controlling the temperature of a heat medium to a predetermined temperature and discharging it, and a control device 6 (for example, a personal computer) for controlling power supply for performing a charge/discharge test are provided. The frame 4 of this embodiment corresponds to the supporting portion of the invention.

3, the heat exchange plate 2 is provided with two parallel flow paths 7 through which the heat medium discharged from the circulating water tank 5 flows. Referring to the fixing plate 3 shown at the top of FIG. 5 , two battery holders 8 are detachably fixed to one heat exchange plate 2 so as to straddle the two flow paths 7 so as to be arranged side by side. .

Referring to FIG. 3, the battery holder 8 is a base portion having four storage portions 10a each having an arcuate cross-section, each of which is a space capable of storing four cylindrical secondary batteries 9 having electrodes at both ends in parallel. 10, a lid portion 11 having four storage portions 11a each having an arc-shaped cross section, and holding the secondary battery 9 between the storage portions 10a and 11a so that the secondary battery 9 does not fall off from the base portion 10; It has

The base portion 10 is provided with four screw holes 10b through which the screws 10e can be inserted.
The base portion 10 is configured to be detachable by being screwed to the female screw portion 2a of the heat exchange plate 2 with screws 10e inserted through the screw holes 10b. A heat transfer sheet 12 is sandwiched between the base portion 10 and the secondary battery 9 and between the lid portion 11 and the secondary battery 9 so that heat transfer can be carried out well without gaps as much as possible. The secondary battery 9 has a cylindrical shape and has electrodes 9a and 9b at both upper and lower ends, and the battery holder 8 is opened so that the electrodes 9a and 9b at the upper and lower ends of the secondary battery 9 are exposed.

A hook 10c is provided on the side surface of the base portion 10. As shown in FIG. The lid portion 11 is provided with a snap lock 11b that can be freely engaged with the hook 10c. Further, the base portion 10 is provided with a positioning pin 10d projecting toward the lid portion 11 side. The lid portion 11 is provided with a positioning hole 11c capable of receiving the positioning pin 10d.

A charging/discharging terminal 13 is attached to the fixed plate 3 . The battery holder 8 holds the secondary battery 9 so that electrodes 9a and 9b at both ends of the cylindrical secondary battery 9 are exposed. The charge/discharge terminal 13 can be electrically connected firmly to the electrodes 9a and 9b of 9. That is, when the secondary battery 9 is mounted on the battery holder 8, the charge/discharge terminals 13 can be connected to the electrodes 9a and 9b of the secondary battery 9. FIG. The charging/discharging terminal 13 is connected to the control device 6 by a cable (not shown), and the charging/discharging of each secondary battery 9 is controlled by the control device 6 .

In addition, since the heat exchange plates 2 are arranged side by side in the vertical direction, the faces of the heat exchange plates 2 are aligned in the vertical direction. The work of fixing the fixing plate 3 to which the holder 8 is fixed to the frame 4 can be done from one direction, which makes it simple. In addition, since the heat exchange plates 2 can be attached to the front and back sides of the frame 4, the installation space can be effectively utilized and a compact device can be used to perform charging/discharging tests on a large number of secondary batteries 9. FIG.

There are two methods for connecting the circulating water tank 5 and each heat exchange plate 2: a parallel method and a series method. FIG. 5 shows a parallel heating medium circulation circuit of the present embodiment. 5, the number of heat exchange plates 2 is five, which is half the number of heat exchange plates 2 in FIG. 1, for convenience of explanation. In the parallel system circulation circuit of the present embodiment, the heat medium discharged from the circulation water tank 5 is distributed to each heat exchange plate 2 by the branch block 14 . Then, the heat medium discharged from each heat exchange plate 2 passes through the check valve 15 and is returned to the circulating water tank 5, where it is temperature-controlled again. A secondary battery 9 held by a battery holder 8 is temperature-controlled to a predetermined temperature by a heat medium via a heat exchange plate 2 .

Although there is only one circulating water tank 5 in this embodiment, a plurality of circulating water tanks 5 are provided, the set temperature of the heat medium is changed for each circulating water tank 5, and the heat exchange plate 2 is supplied via a plurality of branch blocks 14. A heat medium may be supplied to the By configuring in this way, it is possible to conduct charging and discharging tests of the secondary battery 9 at different temperatures at the same time.

FIG. 6 shows a serial heating medium circulation circuit as another embodiment of the invention. 6, the number of heat exchange plates 2 is half that of FIG. 1 for convenience of explanation, as in FIG. In the serial circulation circuit of another embodiment, the heat medium discharged from the circulation water tank 5 is directly supplied to the first heat exchange plate 2 .

The heat medium discharged from the first heat exchange plate 2 is supplied to the adjacent second heat exchange plate 2 . The heat medium discharged from the second heat exchange plate 2 is supplied to the adjacent third heat exchange plate 2 . In this way, the heat medium passes through the heat exchange plates 2 in order, and the heat medium discharged from the last heat exchange plate 2 is returned to the circulation water tank 5, where it is tuned again.

In the serial circulation circuit of another embodiment, there was a concern that the temperature control performance of the secondary battery 9 would be different between the first heat exchange plate 2 and the last heat exchange plate 2. However, in this experiment, There was no difference in the temperature control performance of the secondary battery 9 between the first heat exchange plate 2 and the last heat exchange plate 2, probably because the flow velocity of the heat medium was sufficiently high.

7 and 8 show battery holders 8 that hold secondary batteries 9 of other types. The secondary battery 9 in FIGS. 7 and 8 has a rectangular shape and two electrodes 9a and 9b are provided at the upper end. For this reason, the battery holder 8 also has rectangular storage portions 10a and 11a formed of spaces with an upper opening so as to hold the secondary battery 9 so that only the upper end side of the secondary battery 9 is exposed. Other structures are similar to those of the battery holder 8 shown in FIG. 7 and 8, a heat transfer sheet may be sandwiched between the battery holder 8 and the secondary battery 9 as shown in FIG.

9 and 10 show battery holders 8 that hold secondary batteries 9 of other types. The secondary battery 9 in FIGS. 9 and 10 is of a pouch type and has electrodes 9a and 9b at the upper and lower ends, respectively. In FIGS. 9 and 10, the charging/discharging terminal 13 is of a clip type and is connected so as to sandwich the electrodes 9a and 9b. Other structures are similar to those of the battery holder 8 shown in FIG. 9 and 10, a heat transfer sheet may be sandwiched between the battery holder 8 and the secondary battery 9 as shown in FIG.

According to the secondary battery charging/discharging test apparatus 1 of the present embodiment, since the heat exchange plate 2 is temperature-controlled by the heat medium, the temperature of the plurality of secondary batteries 9 held in parallel by the battery holder 8 is simultaneously controlled. Thus, the temperature of each of the secondary batteries 9 can be properly controlled, and the charge/discharge test can be performed on the plurality of secondary batteries 9 using a test apparatus having a simple structure.

Further, according to the secondary battery charging/discharging test device 1 of the first embodiment, the battery holder 8 is detachably fixed to the heat exchange plate 2, so other devices such as those shown in FIGS. When testing a type of secondary battery 9, the battery holder 8 can be simply replaced with another battery holder 8 capable of holding a different type of secondary battery, and versatility can be improved. can.

In addition, in the secondary battery charge/discharge test apparatus 1 of the present embodiment, the heat medium has a larger heat capacity than air, as compared with a constant temperature bath type secondary battery charge/discharge test apparatus that performs temperature control with temperature-controlled air. Moreover, even if a plurality of secondary batteries are arranged close to each other, the temperature can be appropriately controlled, so that the size of the device as a whole can be reduced.

1 secondary battery charging/discharging test device 2 heat exchange plate 2a female screw portion 3 fixing plate 4 frame (supporting portion)
5 Circulating water tank 6 Control device 7 Flow path 8 Battery holder 9 Secondary batteries 9a, 9b Electrode 10 Base part 10a Storage part 10b Screw hole 10c Hook 10d Positioning pin 10e Screw 11 Lid part 11a Storage part 11b Patch lock 11c Positioning hole 12 Heat transfer sheet 13 Charge/discharge terminal 14 Branch block 15 Check valve

In order to achieve the above object, the secondary battery charge/discharge test device of the present invention includes:
In a secondary battery charging/discharging test device for charging and discharging a plurality of secondary batteries to evaluate the performance of the secondary battery,
a plurality of battery holders for storing a plurality of secondary batteries in parallel;
a heat exchange plate having a mounting plane on which the plurality of battery holders are mounted side by side, and through which a temperature-controlled heat medium circulates;
with
The battery holder is detachably attached to the mounting plane of the heat exchange plate , and the temperature of the secondary battery in the battery holder is adjusted to a predetermined temperature by heat from the heat exchange plate,
The battery holder is a plurality of types of battery holders provided with storage space according to the shape of the secondary battery to be stored, and the battery holder is selected and mounted according to the shape of the secondary battery. .

Moreover, in the present invention,
The battery holders are provided with a plurality of types of battery holders provided with spaces for accommodating secondary batteries according to the shape of the batteries to be accommodated .

Further, in the present invention, it is preferable that a supporting portion that supports a plurality of the heat exchange plates is provided, which is a member separate from the battery holder, and that the heat exchange plates are supported on front and back sides of the supporting portion, respectively. .

Claims (6)

In a secondary battery charging/discharging test device that performs charging and discharging of a plurality of secondary batteries and evaluates the performance of the secondary batteries,
a battery holder for storing a plurality of secondary batteries in parallel;
a heat exchange plate through which a temperature-controlled heat medium circulates;
with
A secondary battery charging/discharging test apparatus, wherein the battery holder is detachably attached to a heat exchange plate, and the temperature of the secondary battery in the battery holder is adjusted to a predetermined temperature by heat from the heat exchange plate. The secondary battery charge and discharge test device according to claim 1,
A secondary battery charging/discharging test apparatus, wherein the battery holder is provided with a plurality of types of battery holders provided with storage spaces according to the shape of the secondary battery to be stored. The secondary battery charge/discharge test device according to claim 1 or claim 2,
A secondary battery charging/discharging test apparatus, wherein the battery holder has a storage portion for exposing electrodes of the stored secondary battery. The secondary battery charge and discharge test device according to claim 3,
A secondary battery charging/discharging test apparatus, wherein terminals for charging/discharging are freely connectable to electrodes of the secondary battery housed in the battery holder when the battery holder is attached to the heat exchange plate. . The secondary battery charge/discharge test device according to any one of claims 1 to 4,
A secondary battery charging/discharging test apparatus, wherein the heat exchange plates are arranged vertically. The secondary battery charge/discharge test device according to any one of claims 1 to 5,
A support portion that supports a plurality of the heat exchange plates,
A secondary battery charging/discharging test apparatus, wherein the heat exchange plates are supported on front and back sides of the supporting portion, respectively.

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