JP2013164378A - Charge/discharge test device and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for easily manufacturing a charge/discharge test device which does not need a cable for connection between a test object and a charge/discharge power source, and further has specifications corresponding to test objects in different volumes, sizes and shapes.SOLUTION: The charge/discharge test device comprises: a test tank 13 housing a test object w; a charge/discharge power source 8 provided outside the test tank 13; and a connector 26 electrically connecting the test object w housed in the test tank 13 and the charge/discharge power source 8 outside the test tank 13. An opening 33 formed on a part of an adiabatic wall that defines and forms the test tank 13 is blocked by inner and outer wall plates 29a and 29b facing each other from both sides of the adiabatic wall in a thickness direction. The connector 26 is attached to attachment holes respectively formed on the inner and outer wall plates 29a and 29b with a heat insulation material 30 interposed between the wall plates 29a and 29b, so as to penetrate the inner and outer wall plates 29a and 29b.

Description

  The present invention relates to a charge / discharge test apparatus for performing a charge / discharge test of a secondary battery, an electric double layer capacitor, and the like, and a manufacturing method thereof.

  2. Description of the Related Art In recent years, due to advances in electronic technology, demand for secondary batteries used in various types of electronic devices with high performance, miniaturization, and portability, and electric vehicles as environmentally friendly products has increased. In connection with this, in order to ensure the research and development of the secondary battery and the reliability of the product, an apparatus for performing a charge / discharge test of the secondary battery has been proposed (for example, see Patent Document 1).

  Conventionally, when performing a charge / discharge test of a secondary battery in a desired temperature environment, an existing constant temperature tester is used. FIG. 9 is a diagram showing a schematic configuration of a system for performing a charge / discharge test of a secondary battery using a constant temperature tester.

  This system includes a thermostat 36 having a thermostat chamber in which a plurality of battery trays 35 to which test batteries (not shown) as test objects are mounted are accommodated, and a plurality of charge / discharges corresponding to each battery tray 35. A charging / discharging power supply rack 38 in which the power supply 37 is housed, and a control device 39 composed of, for example, a computer that controls the charging / discharging test are provided.

  The plurality of battery trays 35 accommodated in the thermostat of the thermostat 36 and the plurality of charge / discharge power supplies 37 of the charge / discharge power supply rack 38 have cable holes 40 formed so as to penetrate the heat insulating material of the thermostat. The test battery, which is a secondary battery mounted on the battery tray 35, and the charge / discharge power source 37 are electrically connected to each other through a plurality of power connection cables 41 drawn out in an airtight manner. The control device 39 is individually connected to the constant temperature tester 36 and the charge / discharge power supply rack 38 via the communication cables 42 and 43.

JP 2003-282150 A

  In such a conventional system, the constant temperature tester 36 and the charge / discharge power supply rack 38 are individually installed, and the battery tray 35 accommodated in the constant temperature bath of the constant temperature tester 36 and the charge / discharge power supply 37 of the charge / discharge power supply rack 38 are provided. Since the power connection cable 41 is used for connection, there is a problem that the space efficiency is poor and the connection work of the power connection cable 41 is troublesome. In addition, when the power connection cable 41 becomes long, the resistance and inductance of the wiring increase, so that it is difficult to improve the accuracy of electrical characteristic measurement (measurement of voltage, current, frequency, impedance, etc.), or Joule heat generation due to the resistance component occurs. There is a problem that power loss increases and power loss increases.

  Furthermore, the capacity, size, and shape of the secondary battery that is the test object vary, and when performing a charge / discharge test of a secondary battery having a different size, shape, etc., a battery tray corresponding to the secondary battery. In addition, there is a problem that the changed battery tray and the charge / discharge power source must be reconnected by the power connection cable.

  The present invention has been made in view of the above points, and solves the above problems by eliminating the need for a cable for connection between the DUT and the charge / discharge power supply, and also provides the capacity, size, shape, etc. The main purpose is to make it possible to easily manufacture a charge / discharge test apparatus having specifications corresponding to different test objects.

  In order to achieve the above object, the present invention is configured as follows.

  (1) The charge / discharge test apparatus of the present invention includes a test tank in which a test object is accommodated, a charge / discharge power source provided outside the test tank, the test object accommodated in the test tank, and the test. A connection tool for electrically connecting the charge / discharge power supply outside the tank, and openings formed in a part of the heat insulating wall defining the test tank from both sides in the thickness direction of the heat insulating wall. The inner and outer wall plates are opposed to each other, and a heat insulating material is interposed between the inner and outer wall plates, and the connection tool is inserted into each of the mounting holes formed in each of the inner and outer wall plates. It is mounted so as to penetrate the wall plate.

  The opening is preferably formed in a heat insulating wall inside the test chamber facing a loading / unloading port for loading / unloading the DUT into / from the test chamber. This opening is for electrically connecting the charge / discharge power source outside the test chamber and the test object in the test chamber by means of a connector provided so as to penetrate both the inner and outer wall plates that close the opening. It is preferable that the charge / discharge power source provided outside the test tank has such a size as to face the test tank.

  According to the charge / discharge test apparatus of the present invention, the opening formed in a part of the heat insulating wall defining the test tank is closed with the heat insulating material sandwiched between the inner and outer wall plates and provided so as to penetrate both wall plates. Because the connection tool electrically connects the DUT stored in the test chamber to the charge / discharge power supply outside the test chamber, a power connection cable is not required to connect the DUT and the charge / discharge power supply. In addition to improving space efficiency, there is no need to perform troublesome connection work of the power connection cable.

  In addition, the inner and outer wall plates are each provided with a mounting hole corresponding to the connector at a required position, and the inner and outer wall plates are opposed to each other through an opening formed in a part of the heat insulating wall. In addition to mounting the connection tool over the mounting hole, and by interposing a heat insulating material between the two wall plates, it is possible to easily obtain a heat insulating wall with the required connection tool penetratingly mounted at a required position by closing the opening. be able to.

  Therefore, when manufacturing a charge / discharge test apparatus with specifications corresponding to the DUT with greatly different capacities, sizes, shapes, etc., for example, charge / discharge test apparatuses with different connectors and installation positions, etc. It is only necessary to close the opening formed in the part with inner and outer wall plates and heat insulating materials to which the connector of the specification corresponding to the test object is mounted, and the specification according to the capacity, size, shape, etc. of the test object Can be manufactured easily and at low cost.

  (2) In a preferred embodiment of the present invention, a sample tray on which a test object is placed is accommodated in the test tank, and the sample tray electrically connects the test object to be placed and the connection tool. A connection part for connecting the test object electrically, and the connection tool electrically connects the test object placed on the sample tray and the charge / discharge power source via the sample tray.

  According to this embodiment, by connecting the sample tray connection portion to the connection tool, a charge / discharge test can be performed by electrically connecting the DUT to be tested and the charge / discharge power source. As in the example, it is not necessary to connect the sample tray and the charge / discharge power source with the power connection cable.

  (3) In still another embodiment of the present invention, the charge / discharge power source and the connection tool are respectively installed in a plurality of stages in the vertical direction, and each of the inner and outer wall plates is equipped with a plurality of connection tools. Mounting holes are respectively formed in the vertical direction, and heat insulating materials interposed between the inner and outer wall plates are stacked in a plurality of stages in the vertical direction.

  According to this embodiment, when manufacturing a charge / discharge test apparatus having specifications corresponding to different test objects having different capacities, sizes, etc., the inner and outer wall plates, heat insulating materials, and connecting devices that block the openings formed in the heat insulating walls. In accordance with the specifications, the charging / discharging power source should be in accordance with the specifications, and it is possible to easily manufacture a charging / discharging test apparatus with specifications corresponding to the DUT having different capacities and sizes. it can.

  (4) In another embodiment of the present invention, the connector is mounted in an airtight manner on the mounting hole via a sealing material.

  According to this embodiment, it is possible to prevent the air whose temperature and humidity are adjusted from flowing out of the test chamber from the attachment part of the heat insulation wall, and to improve the heat insulation performance of the test chamber and maintain a stable environment. be able to.

  (5) The method for manufacturing a charge / discharge test apparatus according to the present invention includes a test tank in which a test object is accommodated, a charge / discharge power source provided outside the test tank, and the test object accommodated in the test tank. And a connection tool for electrically connecting the charge / discharge power source outside the test tank, and a charge / discharge test apparatus manufacturing method, wherein the charge / discharge test apparatus is formed on a part of a heat insulating wall defining the test tank. The inner and outer wall plates each having a mounting hole in which the connecting tool is mounted are closed from both sides in the thickness direction of the heat insulating wall, and a heat insulating material is interposed between the inner and outer wall plates. The connecting tool is mounted in the mounting hole so as to penetrate both the inner and outer wall plates.

  According to the method for manufacturing a charge / discharge test apparatus of the present invention, in the case of manufacturing a charge / discharge test apparatus having specifications corresponding to a test object having greatly different capacities, sizes, shapes, etc., the heat insulation wall that partitions the test tank is formed. What is necessary is just to block the formed opening with the inner and outer wall plates and the heat insulating material to which the connector according to the specification is mounted, and the charge / discharge test apparatus with the specification according to the capacity, size, shape, etc. of the DUT. It can be manufactured easily and at low cost.

  As described above, according to the present invention, the opening formed in the heat insulating wall defining and forming the test tank is closed by sandwiching the heat insulating material between the inner and outer wall plates, and is provided so as to penetrate both wall plates. The charge / discharge test can be performed by electrically connecting the DUT accommodated in the test tank and the charge / discharge power source outside the test tank, so that the DUT can be connected to the charge / discharge power supply. A power connection cable is not required, space efficiency is improved, and there is no need for troublesome connection work of the power connection cable.

  In addition, it is possible to evaluate battery characteristics in an area where it was impossible in the past by improving the accuracy of electrical characteristic measurement (such as voltage, current, and impedance measurement at a higher frequency). Furthermore, the effect of improving the quality of the waveform applied to the sample and increasing the rise time, and the effect of reducing the power loss due to the wiring resistance can be expected.

  In addition, when manufacturing a charge / discharge test device with specifications corresponding to test objects with different capacities, sizes, etc., the inner and outer wall plates, heat insulating materials, and connectors that close the openings formed in the heat insulating walls are specified. The charging / discharging power source may be in accordance with the specifications, and a charging / discharging test apparatus having specifications corresponding to the test objects having different capacities and sizes can be manufactured easily and at low cost. .

FIG. 1 is a schematic configuration diagram of a system including a charge / discharge test apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing a schematic configuration by cutting out the inside of the charge / discharge test apparatus of FIG. 1. FIG. 3 is a perspective view showing a connection configuration between the sample tray and the connector of the charge / discharge power source. FIG. 4 is a longitudinal side view of the test tank. FIG. 5 is a longitudinal side view showing the opening formed in the heat insulating wall of the test layer. FIG. 6 is an exploded perspective view of the inner and outer wall plates and the heat insulating material that block the opening formed in the heat insulating wall of the test tank. FIG. 7 is a longitudinal side view of a test tank provided with heat insulating walls having different specifications. FIG. 8 is a vertical cross-sectional side view of a test tank according to another embodiment having a different connection tool mounting site. FIG. 9 is a schematic configuration diagram of a conventional system.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a schematic configuration of a charge / discharge evaluation system 1 for evaluating charge / discharge characteristics of a test object such as a secondary battery.

  In this charge / discharge evaluation system 1, charge / discharge tests can be performed on test objects such as various secondary batteries such as nickel / cadmium batteries, lithium ion batteries, nickel metal hydride batteries, and electric double layer capacitors.

  The charge / discharge evaluation system 1 includes a charge / discharge test apparatus 2 according to an embodiment of the present invention, and a charge / discharge test of a device under test by controlling the charge / discharge test apparatus 2. 3 is provided.

  The charge / discharge test apparatus 2 of this embodiment includes a single housing 4. The casing 4 is schematically a test section 6 in which a front portion of the housing 4 is provided with a constant temperature test chamber in which a plurality of sample trays 5 with test objects (not shown) are mounted. The back portion is a power supply unit 9 in which a plurality of charge / discharge power supplies 8 corresponding to the respective sample trays 5 are accommodated. The front test section 6 and the rear power supply section 9 are partitioned forward and backward by partition walls 7 having a heat insulating structure, as schematically shown by phantom lines. The test unit 6 and the power supply unit 9 basically have functions as a constant temperature tester and a charge / discharge power supply rack of the conventional example of FIG.

  The control device 3 is connected to the charge / discharge test device 2 via the test tank communication cable 10 and the charge / discharge power supply communication cable 11, and the control device 3 controls the charge / discharge test device 2 to control the test object w. Conduct charge / discharge test.

  FIG. 2 is a perspective view showing a schematic configuration by cutting out the inside of the charge / discharge test apparatus 2 in FIG. 1.

  In the charge / discharge test apparatus 2 of this embodiment, a door 12 having a heat insulating structure is attached to the front surface of a housing 4, and a plurality of samples on which a test object w is placed inside the door 12 opened. A test tank 13 that is a constant temperature bath capable of accommodating the tray 5 is provided, and the sample tray 5 can be inserted and removed in a plurality of stages in the vertical direction in the test tank 13.

  On the right side of the front door 12 in the housing 4, there are provided a display unit 14 for displaying temperature data and an operation unit 15 operated for setting the temperature and the like.

  The test tank 13 is composed of a heat insulating wall except for the front opening and closing opening that is opened and closed by the door 12, and the test tank 13 is filled with a partition wall 7 that forms a part of the heat insulating wall. It is partitioned from a power storage space in which the discharge power supply 8 is stored. The charge / discharge power supply 8 is arranged in a plurality of stages in the vertical direction in the power storage space outside the test tank 13.

  The right side of the test tank 13 is partitioned from the conditioned space by a partition plate 18 having a vent hole, and by driving a plurality of blowers 19, air whose temperature is controlled circulates between the conditioned spaces. It is configured.

  As shown by the arrow A, each sample tray 5 mounted in the test tank 13 is inserted into the tank or pulled out from the test tank 13. A pair of left and right guide rails (not shown) for guiding and supporting each along the direction are provided.

  In the inner partition 7 of the test chamber 13, a connector 26 as a connection tool for each of the plurality of charge / discharge power supplies 8 accommodated vertically in the power storage space is penetrated and protruded into the test chamber 13. Yes. In this embodiment, the connector 26 is an edge connector.

  Each of the plurality of test objects w is placed on the sample tray 5 and attached to each of a plurality of sockets (not shown) provided on the sample tray 5. As shown in FIG. 3, an edge 27 serving as a sample side connection portion corresponding to the connector 26 of the charge / discharge power source 8 is provided at the distal end portion of the sample tray 5 in the insertion direction into the test chamber 13.

  As shown in FIG. 4, the sample tray 5 is slid horizontally into the test chamber 13 along the guide rail, and the edge 27 provided at the tip thereof is inserted into the connector 26 penetrating the partition wall 7. Thus, the device under test w can be electrically connected to the charge / discharge power supply 8 via the socket and the wiring of the sample tray 5. Further, the sample tray 5 is slid out of the test chamber 13 along the guide rail and pulled out, and the edge 27 is extracted from the connector 26, whereby the DUT and the charge / discharge power source 8 are electrically disconnected. can do.

  Thus, the sample tray 5 with the test object w mounted thereon is slid horizontally into the test tank 13 along the guide rail, or is pulled out by sliding from the test tank 13 to pull out the sample tray 5. The electrical connection / disconnection between the test object w and the charge / discharge power source 8 can be easily performed.

  The temperature control in the charge / discharge test varies depending on the target test. For example, the sample tray 5 on which the object to be tested w is mounted is set in the test tank 13, and the test tank 13 is set to a set temperature, For example, the charge / discharge test is performed at each temperature by controlling the temperature to 80 ° C., 25 ° C., minus 10 ° C., or the like. In this charge / discharge test, for example, at least one of charging and discharging of the DUT w is performed to acquire characteristic data such as charging characteristics, discharging characteristics, and charging / discharging repetition characteristics. Based on the acquired characteristic data, the charge / discharge characteristics of the DUT w can be evaluated.

  In the charge / discharge test apparatus 2 of this embodiment, a charge / discharge power source 8 is housed in a single housing 4 and a plurality of sample trays 5 loaded with a test object w are slid into a test chamber 13. Then, the test object w and the charging / discharging power supply 8 are electrically connected by inserting the edge 27 of the tip end into the connector 26 of the charging / discharging power supply 8. There is no need to connect the sample tray of the body constant temperature tester and the charge / discharge power supply of the charge / discharge power supply rack with the power connection cable, which improves space efficiency and eliminates the need for troublesome connection work of the power connection cable. .

  Further, since the charge / discharge power supply 8 is arranged in a plurality of stages along the vertical direction of the housing 4, the space efficiency is good.

  As described above, the capacity, size, and shape of the test object w such as the secondary battery are various. In order to perform a charge / discharge test of the test object w having different capacity, size, etc., for example, a charge / discharge power source 8 and the number of connectors 26, the type of connector 26, the vertical installation interval of the connector 26, and the like must correspond to the object to be tested w.

  In this embodiment, in order to enable easy and low-cost production of a charge / discharge test apparatus with specifications corresponding to the DUTs w having different capacities and sizes, the following configuration is provided. ing.

  That is, in the manufacturing method of the charge / discharge test apparatus of this embodiment, as shown in FIG. 5, a rectangular large opening 33 is formed in the heat insulating wall 34 inside the test tank 13, and this opening 33 is formed into the heat insulating wall. As shown in FIG. 4, the inner and outer wall plates 29 a and 29 b shown in FIG. 6 are closed from both sides in the thickness direction 34 by interposing a heat insulating material 30 such as urethane foam and glass wool between the wall plates 29 a and 29 b. A partition wall 7 having a heat insulating structure is formed.

  As shown in FIG. 6, a mounting hole 28 that penetrates and supports the connector 26 is formed in the inner and outer wall plates 29 a and 29 b constituting the partition wall 7 in advance. The heat insulating material 30 is divided into upper and lower parts at the connector penetrating portion and stacked, and the connector 26 is inserted into the through hole 31 formed in the divided cross section. The inner and outer wall plates 29a and 29b are provided with a heat insulating material 30 and a connector 26 is attached so as to penetrate both the wall plates 29a and 29b, and are connected to the periphery of the opening 33 by screws.

  According to such a configuration, when manufacturing a charge / discharge test apparatus having specifications corresponding to the test object w having greatly different capacities, sizes, shapes, etc., the connector 26 and the inner and outer wall plates 29a, 29b according to the specifications are manufactured. Further, the opening 33 formed in the heat insulating wall 34 may be closed using the heat insulating material 30, and it is not necessary to manufacture the entire test tank 13 again according to the specifications, the manufacturing process is simplified and the cost is reduced. be able to.

  For example, when a charge / discharge test is performed on a test object w having a size larger than that of the test object w of FIG. 4, as shown in FIG. What is necessary is just to block the opening 33 using 29b and to install the corresponding charging / discharging power supply 8.

  In the case where the test tank 13 is used as a constant humidity tank, as shown in FIG. 8, a sealing material 32 is applied around the connector 26 or externally fitted, so that the airtightness at the connector mounting site is obtained. It is preferable to improve the property.

  Further, when the inner and outer wall plates 29a and 29b, the heat insulating material 30 and the connector 26 are replaced according to the required specifications, the guide rails provided on the left and right inner surfaces of the test chamber 13 are also in accordance with the height position of the connector 26. The sample tray 5 on which the test object w having a large height is stored and mounted can be easily inserted and loaded into the test chamber 13 by changing the height of the rail or adjusting the rail height.

  In addition, the connector 26, a plurality of types of inner and outer wall plates 29a and 29b, and the heat insulating material 30 with different vertical intervals and height positions are prepared in advance so as to correspond to the edge 27 of the sample tray 5 to be inserted. A test adapted to the sample tray 5 configured according to the size and shape of the object to be tested w by selecting these and attaching them to the opening 33 formed in the heat insulating wall in the inner part of the test chamber 13 The tank 13 can be manufactured or modified.

(Other embodiments)
The present invention can also be implemented in the following forms.

  (1) As the heat insulating material 30 incorporated between the inner and outer wall plates 29a and 29b, a resin material is injected between the inner and outer wall plates 29a and 29b assembled with the connector (connector) 26 and foamed. Also good.

  (2) The connection tool 26 for electrical connection between the sample tray 5 and the charge / discharge power supply 8 is not limited to the edge connector, and, for example, fits in accordance with the insertion and withdrawal of the sample tray 5 into the test chamber 13. Alternatively, other connectors that can be detached, or contact-type connectors such as pogo pins (spring probes) having a spring action may be used.

  (3) In the above-described embodiment, the charge / discharge test apparatus 2 includes a single test tank 13 that is long in the vertical direction, but includes a plurality of test tanks in the vertical direction, and a plurality of test trays in each test tank. It may be stored.

  (4) The test tank 13 for storing the object to be tested w is not limited to a constant temperature tank, and can be set to a constant temperature / humidity tank, a pressure tank, or any other specification that provides an environment required for the test.

2 Charge / Discharge Test Device 3 Control Device 4 Case 5 Sample Tray 7 Bulkhead 8 Charge / Discharge Power Supply 13 Test Tank 26 Connector (Connector)
28 Mounting hole 29a, 29b Wall plate 30 Heat insulating material 32 Sealing material w DUT

Claims (5)

Electrically connecting a test tank in which the DUT is accommodated, a charge / discharge power source provided outside the test tank, the DUT accommodated in the test tank, and the charge / discharge power source outside the test tank A connecting tool for connecting,
The openings formed in a part of the heat insulating wall defining the test chamber are closed by opposing inner and outer wall plates from both sides in the thickness direction of the heat insulating wall, and a heat insulating material is provided between the inner and outer wall plates. Interposing, and mounting the connection tool in each mounting hole formed in each of the inner and outer wall plates so as to penetrate both the inner and outer wall plates,
The charge / discharge test apparatus characterized by the above-mentioned. The test tank contains a sample tray on which a test object is placed,
The sample tray has a connection part for electrically connecting the DUT to be placed and the connection tool,
The connection tool electrically connects the test object placed on the sample tray and the charge / discharge power source via the sample tray.
The charge / discharge test apparatus according to claim 1. The charge / discharge power source and the connection tool are respectively installed in a plurality of stages in the vertical direction
Each of the inner and outer wall plates is formed with a plurality of mounting holes for mounting each connection tool in the vertical direction,
The heat insulating material interposed between the inner and outer wall plates is laminated in a plurality of stages in the vertical direction.
The charge / discharge test apparatus according to claim 1. The connector is mounted in an airtight manner on the mounting hole via a sealant;
The charge / discharge test apparatus according to claim 1. Electrically connecting a test tank in which the DUT is accommodated, a charge / discharge power source provided outside the test tank, the DUT accommodated in the test tank, and the charge / discharge power source outside the test tank A manufacturing method of a charge / discharge test apparatus comprising a connection tool for connection,
The opening formed in a part of the heat insulating wall defining the test chamber is closed from both sides in the thickness direction of the heat insulating wall by inner and outer wall plates each having a mounting hole to which the connection tool is mounted. In addition, a heat insulating material is interposed between the inner and outer wall plates, and the connection tool is mounted in the mounting hole so as to penetrate both the inner and outer wall plates.
The manufacturing method of the charging / discharging test apparatus characterized by the above-mentioned.

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