JP2015052469A - Charge-discharge testing system, charge-discharge testing apparatus, and calibration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a conventional problem of the need to regularly carry out work for connecting a measuring instrument, a discharger or the like to a testing terminal of charge-discharge testing apparatus, measuring a charge-discharge voltage and a charge-discharge current, and regulating setting of the charge-discharge testing apparatus.SOLUTION: According to the present invention, a charge-discharge testing apparatus includes: at least one charging circuit; at least one discharging circuit opposed to the charging circuit; a first communication unit wirelessly receiving a measurement value obtained by a calibration unit arranged between the charging circuit and the discharging circuit; and a control unit regulating the charging circuit and the discharging circuit on the basis of the measurement value. The calibration unit includes: a measuring unit that includes a testing terminal having a shape that enables the testing terminal to be arranged on the charge-discharge testing apparatus in place of a secondary battery and arranged at the same position as that of a power supply terminal of the secondary battery, and measuring electrical properties of the charging circuit and the discharging circuit of the charge-discharge testing apparatus by connecting the testing terminal to the charge-discharge testing apparatus in place of the secondary battery; and a second communication unit wirelessly transmitting the measurement value of the measuring unit to the charge-discharge testing apparatus.

Description

  The present invention relates to a charge / discharge test system, a charge / discharge test apparatus, and a calibration method.

  In recent years, secondary batteries have attracted attention in various fields, such as electric vehicles, nighttime response of solar cell systems, and emergency storage batteries during disasters. The secondary battery is subjected to a charge test and a discharge test by a charge / discharge test apparatus, and the quality is maintained (see, for example, Patent Document 1).

  On the other hand, the manufacturer periodically inspects whether the electrical characteristics of the charge / discharge test equipment used to test the secondary battery meet the test specifications and calibrates so that proper performance can be maintained. It is demanded.

JP 2010-223896 A

  The manufacturer shall regularly perform the work of measuring the charge / discharge voltage and charge / discharge current and adjusting the settings of the charge / discharge test device by connecting a measuring instrument or discharger to the test terminal of the charge / discharge test device. There is a problem that must be.

  The charge / discharge test system, the charge / discharge test apparatus, and the calibration method disclosed herein are intended to provide a technique that can automatically calibrate a charge / discharge test apparatus while performing a charge / discharge test of a secondary battery. .

  According to one aspect, a charge / discharge test system includes a charge / discharge test apparatus that performs a charge / discharge test of a secondary battery, and a calibration unit for calibrating the charge / discharge test apparatus. The test apparatus wirelessly receives measurement values measured by at least one charging circuit, at least one discharging circuit facing the charging circuit, and a calibration unit disposed between the charging circuit and the discharging circuit. And a control unit that adjusts the charging circuit and the discharging circuit based on the measured value, and the calibration unit has a shape that can be arranged in the charging / discharging test apparatus instead of the secondary battery, and the secondary unit It has a test terminal arranged at the same position as the power terminal of the battery, connects the test terminal to the charge / discharge test device instead of the power terminal of the secondary battery, and charges the charge circuit and the discharge circuit of the charge / discharge test device. And having a measuring unit for measuring a characteristic, and a second communication unit for transmitting the measurement value measuring unit is measured charge and discharge test device by wireless.

  According to one aspect, the charge / discharge test apparatus measures at least one charging circuit, at least one discharging circuit facing the charging circuit, and a calibration unit arranged between the charging circuit and the discharging circuit. It has the 1st communication part which receives a value by radio | wireless, and the control part which adjusts a charging circuit and a discharge circuit based on a measured value, It is characterized by the above-mentioned.

  According to one aspect, the calibration method is a calibration method in which a charge / discharge test apparatus that performs a charge / discharge test of a secondary battery is calibrated using a calibration unit. The charge / discharge test apparatus includes at least one charging circuit and at least one charge circuit. The measurement value measured by the calibration unit arranged between the charging circuit and the discharging circuit is received wirelessly by facing one discharging circuit, and the charging circuit and the discharging circuit are adjusted based on the measuring value, The calibration unit has a shape that can be arranged in the charge / discharge test apparatus instead of the secondary battery, and has a test terminal arranged at the same position as the power terminal of the secondary battery, and the power terminal of the secondary battery Instead of, a test terminal is connected to a charge / discharge test device, the electrical characteristics of the charge circuit and the discharge circuit of the charge / discharge test device are measured, and the measured value is transmitted to the charge / discharge test device wirelessly.

  The charge / discharge test system, the charge / discharge test apparatus, and the calibration method of the present disclosure can automatically calibrate the charge / discharge test apparatus while performing a charge / discharge test of the secondary battery.

It is a figure which shows the example of the charging / discharging test system for testing a secondary battery. It is a figure which shows the example of a connection with a charging / discharging test apparatus, a calibration unit, and a secondary battery. It is a figure which shows the example of a charging / discharging test system. It is a figure which shows the example of a connection when calibrating a charging / discharging test device by a calibration unit. It is a figure which shows operation | movement of an output circuit. It is a figure which shows operation | movement of an input circuit. It is a figure which shows an example of the input / output circuit and adjustment circuit of a charging / discharging circuit. It is a figure which shows an example of an adjustment circuit. It is a flowchart which shows the process example of the offset adjustment of the measured value of a charging voltage and a charging voltage. It is a flowchart which shows the process example of the full scale adjustment of the measured value of a charging voltage and a charging voltage. It is a flowchart which shows the process example of the offset adjustment of the measured value of discharge current and discharge current. It is a flowchart which shows the process example of the full scale adjustment of the measured value of discharge current and discharge current. It is a flowchart which shows the process example of the offset adjustment of the measured value of charging current and charging current. It is a flowchart which shows the process example of the full scale adjustment of the measured value of charging current and charging current. It is a flowchart which shows the process example of the offset adjustment of the measured value of discharge voltage and discharge voltage. It is a flowchart which shows the process example of the full scale adjustment of the measured value of discharge voltage and discharge voltage.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 shows an example of a charge / discharge test system 100 for testing a secondary battery 150. The charge / discharge test system 100 shown in FIG. 1 performs a charge / discharge test for inspecting charge performance and discharge performance by flowing the manufactured secondary battery 150 through a test line. The charge / discharge test system 100 uses, for example, a plurality of charge / discharge test apparatuses 101 for each test content. In the example of FIG. 1, the charge / discharge test system 100 includes three types of test lines: a test line A that performs a mode A test, a test line B that performs a mode B test, and a test line C that performs a mode C test. . Here, each test of mode A, mode B, and mode C differs in the test contents such as the magnitude of the charging current, the charging pattern, the magnitude of the discharging current, and the discharging pattern. For example, the test contents include quick charge in mode A, continuous discharge in mode B, repeated charge and discharge in mode C, and the like.

  1, the test line A has a plurality of test devices such as a charge / discharge test device 101a1, a charge / discharge test device 101a2, a charge / discharge test device 101a3, etc., for example, the charge / discharge test device 101a1 is a secondary battery. A test of mode A is performed for 150_1. Further, the test line B has a plurality of test devices such as a charge / discharge test device 101b1, a charge / discharge test device 101b2, a charge / discharge test device 101b3, etc., for example, the charge / discharge test device 101b2 is connected to the secondary battery 150_2. On the other hand, the mode B test is performed. Similarly, the test line C includes a plurality of test apparatuses such as a charge / discharge test apparatus 101c1, a charge / discharge test apparatus 101c2, a charge / discharge test apparatus 101c3,. For example, the charge / discharge test apparatus 101c1 performs a mode C test on the secondary battery 150_3, and the charge / discharge test apparatus 101c2 performs a mode C test on the secondary battery 150_4.

  The charge / discharge test apparatuses 101a1, 101a2, 101a3, 101b1, 101b2, 101b3, 101c1, 101c2, and 101c3 are test apparatuses having the same or similar functions capable of selecting a test mode. In the following description, when the contents common to these test apparatuses are described, the symbols of the test apparatuses are the same as those of the charge / discharge test apparatus 101, for example, except for alphabets a *, b *, c * (* is a number). It is written. Secondary batteries and calibration units are also expressed in the same way, and the secondary battery code is expressed as secondary battery 150 except for the “_number” at the end when it is common to multiple secondary batteries, for example. The Similarly, the symbol of the calibration unit is expressed as the calibration unit 102 except for the “_number” at the end when it is common to a plurality of calibration units.

  Here, the case where the calibration test is performed by the conventional method in the charge / discharge test system 100 will be described. The maintenance person periodically inspects the electrical characteristics when the charge / discharge test apparatus 101 tests the secondary battery 150, and if the inspection result does not satisfy a predetermined test specification, the charge / discharge test apparatus 101 Adjust electrical characteristics to meet test specifications. For example, the maintenance person measures whether or not the charging current when performing the charging test of the secondary battery 150 is within a specified range. Then, when the charging current is out of the specified range, the maintenance person adjusts the charge / discharge test apparatus 101 so that the charging current becomes, for example, the median value of the specified range. Here, when the charging current is out of the specified range, the rechargeable battery 150 that has been tested in the past by the charge / discharge test apparatus 101 will be retested. Even if there is, adjust and manage so that it does not greatly deviate from the specified range.

  As described above, the conventional calibration work is manually performed by a maintenance person, and thus it takes time and cost. In addition, a high-accuracy power supply device or a discharge resistor is used for the calibration, and there is a problem in terms of an increase in equipment size and cost. Furthermore, the charge test and the discharge test have a problem in terms of power saving because electric energy is unnecessarily consumed as heat energy, resulting in a large power loss.

  Therefore, in this embodiment, the maintenance person causes the charge / discharge test apparatus 101 to flow through each test line by passing a calibration unit 102 having the same size or the same size as the case of the secondary battery 150 instead of the secondary battery 150. It can be automatically calibrated.

  FIG. 2 shows a connection example between the charge / discharge test apparatus 101, the calibration unit 102, and the secondary battery 150.

  FIG. 2A shows a state in which the secondary battery 150 is connected to the charge / discharge test apparatus 101. In FIG. 2A, the test terminals 117 of the charge / discharge test apparatus 101 are arranged so as to correspond one-to-one with the terminals 151 of the secondary battery 150. Then, when the terminal 117 comes into contact with the terminal 151, the charge / discharge test apparatus 101 starts a test of the secondary battery 150.

  FIG. 2B shows a state in which the calibration unit 102 is connected to the charge / discharge test apparatus 101. The calibration unit 102 is a casing having the same or similar size as the secondary battery 150, and includes a terminal 118 having the same or similar arrangement as the terminal 151 of the secondary battery 150. At the time of calibration, the terminal 117 of the charge / discharge test apparatus 101 contacts the terminal 118 of the calibration unit 102, and the calibration unit 102 measures the electrical characteristics of the charge / discharge test apparatus 101.

  In FIG. 1, the movement of the secondary battery 150 and the calibration unit 102 within the test line may be performed manually by an operator, or may be automatically performed by a conveyor, a robot, or the like. Further, the calibration unit 102 may move within a group of the same test mode, or may move between groups of different test modes. Further, the calibration unit 102 is placed on the standby rack 160 or the like when not flowing on the test line. In this case, the calibration unit 102 is moved to the standby rack 160 by an operator, a conveyor, a robot, or the like, and flows again to the test line during calibration. The calibration schedule is determined in advance according to the manufacturing process and manufacturing inspection items, and the charge / discharge test system 100 calibrates the charge / discharge test apparatus 101 according to the calibration schedule. Further, when the calibration is automatically performed, the charge / discharge test system 100 calibrates each charge / discharge test apparatus 101 by flowing the calibration unit 102 to the test line by a conveyor or a robot according to the calibration schedule.

FIG. 3 shows an example of the charge / discharge test system 100. In the charge / discharge test system 100, the charge / discharge test apparatus 101 is connected to the calibration unit 102 and is controlled and managed by the test management apparatus 103. The charge / discharge test apparatus 101 is connected to the test management apparatus 103 by, for example, a LAN (Local Area Network). Note that the test management apparatus 103 may manage the charge / discharge test apparatuses 101 of the same test group, or may manage the charge / discharge test apparatuses 101 of a plurality of test groups in common. In FIG. 3, the charge / discharge test apparatus 101 and the test management apparatus 103 are separated as separate apparatuses, but the charge / discharge test apparatus 101 may include the function of the test management apparatus 103 as the charge / discharge test apparatus 101.
[Example of charge / discharge test apparatus 101]
In FIG. 3, the charge / discharge test apparatus 101 includes, for example, a charge / discharge circuit block 111, a control circuit 112, and a power supply circuit 113. Here, the charge / discharge test system 100 has, for example, an RFID (Radio Frequency IDentification) function in order to detect that the secondary battery 150 or the calibration unit 102 on the production line is connected to the charge / discharge test apparatus 101. The RFID function is a technique for recognizing an article or the like to which the RFID tag 191 is attached by reading information stored in the RFID tag 191 in advance with the RFID reader 192. In the example of FIG. 3, the RFID tag 191 is attached to the secondary battery 150 or the calibration unit 102. The RFID reader 192 reads information from the RFID tag 191 when the RFID tag 191 approaches a short distance of several centimeters. The read information is analyzed by the control circuit 112 or a personal computer 133 for control of the test management apparatus 103 described later. The information stored in advance in the RFID tag 191 is unique identification information. The unique identification information may be, for example, identification information of the secondary battery 150 or the calibration unit 102, or if the correspondence with the secondary battery 150 or the calibration unit 102 is known, the identification number or identification code of the RFID tag 191 itself. Etc. With the unique identification information, the test management apparatus 103 can know which charge / discharge test apparatus 101 the secondary battery 150 and the calibration unit 102 are connected to. Instead of the RFID function, identification information may be printed on a code such as a barcode, attached to the secondary battery 150 or the calibration unit 102, and read by a barcode reader provided in the charge / discharge test apparatus 101. Good.

  The charge / discharge circuit block 111 has a circuit in which seven grounds from the charge / discharge circuits CONV1 to CONV7 are insulated. For example, the charge / discharge circuit CONV1 has two charge / discharge circuits ch1 and ch2. Similarly, the charge / discharge circuit CONV2 is ch3 and ch4, the charge / discharge circuit CONV3 is ch5 and ch6, the charge / discharge circuit CONV4 is ch7 and ch8, the charge / discharge circuit CONV5 is ch9 and ch10, and the charge / discharge circuit CONV6 is ch11 and ch12. Each has a charge / discharge circuit. The charge / discharge circuit CONV7 has one charge / discharge circuit of ch13. In the following description, when the matters common to the charging / discharging circuits CONV1 to CONV7 are described, the numerals at the end of the reference numerals are omitted and the charging / discharging circuit CONV is described. Each charging / discharging circuit CONV can be set to a charging circuit or a discharging circuit by the control circuit 112. Furthermore, the charging / discharging circuit CONV1 to the charging / discharging circuit CONV7 have terminals 117 for connecting the secondary battery 150 and the calibration unit 102. In the example of FIG. 3, the charge / discharge test apparatus 101 has 13 sets of channels from channels ch1 to ch13, but may not be 13 sets. Each channel has a positive power supply (+) terminal and a negative power supply (−) terminal.

  The charging / discharging circuit CONV1 to charging / discharging circuit CONV7 are set by the control circuit 112 as a charging circuit or a discharging circuit. The control circuit 112 controls the charging voltage and charging current of the charging circuit, the discharging voltage and discharging current of the discharging circuit, and the like. The charge / discharge circuit CONV1 to the charge / discharge circuit CONV7 perform a charge / discharge test when the secondary battery 150 on the test line is connected, and measure the electrical characteristics such as the charge / discharge current and the charge / discharge voltage to the control circuit 112. Output. In addition, the secondary battery 150 has a plurality of stacked cells, and is connected to a terminal of the charge / discharge test apparatus 101 for each cell, and the electrical characteristics are tested for each cell.

  The control circuit 112 has a LAN interface circuit, is connected to the test management apparatus 103, and controls the charge / discharge circuit block 111 in accordance with a preset test mode or the test contents instructed from the test management apparatus 103. For example, when the calibration unit 102 is connected, the control circuit 112 sets a channel ch instructed from the test management apparatus 103 to a charging circuit, a discharging circuit, or the like.

The power supply circuit 113 is connected to a commercial power supply (AC (Alternating Current) 100V or the like) and supplies power for operating the charge / discharge circuit block 111 and the control circuit 112.
[Example of test management apparatus 103]
In FIG. 3, the test management apparatus 103 includes, for example, a HUB 131, a wireless master device 132, and a personal computer 133.

  The HUB 131 is a network device for connecting the plurality of charge / discharge test apparatuses 101, the wireless master device 132, and the personal computer 133 via a LAN.

  The wireless master device 132 is a device for wirelessly communicating with the wireless slave devices 122 of the plurality of calibration units 102 on the test line.

The personal computer 133 controls the charge / discharge test apparatus 101 in the same test group or the charge / discharge test apparatuses 101 in a plurality of test groups, and performs a manufacturing test of the secondary battery 150 and a calibration test by the calibration unit 102. The personal computer 133 sets the test contents before the manufacturing test and the calibration test, monitors and controls the test state during the test, and acquires and manages the test result after the test. Further, when the result of the calibration test does not satisfy the predetermined test specification, the personal computer 133 and the control circuit 112 adjust the electrical characteristics so that the charge / discharge circuit CONV1 satisfies the test specification. Here, at the time of the calibration test, the personal computer 133 transmits / receives control information to / from a plurality of calibration units 102 on the test line via the wireless master unit 132, and displays the status and measurement result of each calibration unit 102. Receive. In the present embodiment, the case of a single calibration unit 102 will be described. However, the test management apparatus 103 is based on identification information obtained from the RFID tag 191 or the like even if there are a plurality of calibration units 102. Management and control can be performed for each 102.
[Example of calibration unit 102]
In FIG. 3, the calibration unit 102 includes, for example, a control circuit 120, a measurement block 121, a wireless slave device 122, a power supply circuit 123, and a battery 124. Further, as described above, the calibration unit 102 has the RFID tag 191 in which the identification information of the unit itself is stored, and the charge / discharge test apparatus 101 reads the information of the RFID tag 191 by the RFID reader 192. Further, the calibration unit 102 has a terminal 118 connected to the terminal 117 of the charge / discharge test apparatus 101. 2, the terminal 118 of the calibration unit 102 is the same terminal as the terminal 151 of the secondary battery 150, and is connected to the terminal 117 of the charge / discharge test apparatus 101 instead of the secondary battery 150. it can.

  The control circuit 120 is realized by a CPU (Central Processing Unit) or the like, and controls the operation of the entire calibration unit 102 according to a program stored in the CPU. For example, the control circuit 120 transmits the result measured by the measurement block 121 from the wireless slave device 122 to the wireless master device 132 of the test management apparatus 103.

  The measurement block 121 measures the current and voltage at the time of charging / discharging of each channel of the terminal 118 connected to the charge / discharge test apparatus 101. The control circuit 120 controls circuit switching according to the measurement contents (voltage, current, etc.) of the measurement block 121 and reads measurement data of the measurement block 121. Here, the measurement block 121 includes a measurement circuit 201, a shunt resistor R1, and a switch array 202. The measurement circuit 201 includes a voltmeter, an ammeter having a shunt resistor R1, and the like, and outputs a measurement value to the control circuit 120. The switch array 202 can switch the connection between each channel ch by the control circuit 120, and can connect the voltmeter, ammeter, and shunt resistor R1 of the measurement circuit 201 to an arbitrary place.

  The wireless slave device 122 establishes a wireless line (for example, a wireless LAN line) with the wireless master device 132 of the test management apparatus 103, and information on the calibration unit 102 (measurement data, unit information, etc.) and control information such as an alarm. Are transmitted to and received from the test management apparatus 103. Further, the test management apparatus 103 issues a calibration test command to the control circuit 120 of the calibration unit 102 via the wireless master device 132 and the wireless slave device 122 to control the channel ch to be measured, the measurement position, and the like.

  The power supply circuit 123 receives power supply from the battery 124. The power supply circuit 123 converts the power supplied from the battery 124 into a voltage required for operations of the control circuit 120, the measurement block 121, the wireless slave device 122, and the like. In the example of FIG. 3, the power supply circuit 123 converts the DC + 16V voltage supplied from the battery 124 into DC ± 15V and supplies it to the measurement block 121. Further, the power supply circuit 123 converts the voltage of DC + 16V into DC + 3.3V and supplies it to the control circuit 120. Further, the power supply circuit 123 converts the voltage of DC + 16V into DC + 5V and supplies it to the wireless slave device 122.

  As described above, the calibration unit 102 does not have a power cord for connecting to a commercial power supply, and can be handled as a stand-alone like the secondary battery 150 of the test line, and is mixed with the secondary battery 150 and flows to the test line. be able to. Note that the calibration unit 102 according to the present embodiment has a terminal 118 having the same or similar size as the secondary battery 150 and having the same or similar arrangement as the terminal 151 of the secondary battery 150. Further, the calibration unit 102 may be able to charge the battery 124 from a part of the channels ch of the charge / discharge circuit block 111 of the charge / discharge test apparatus 101 while being connected to the charge / discharge test apparatus 101. Alternatively, the calibration unit 102 may receive power from a part of the channels of the charge / discharge circuit block 111 of the connected charge / discharge test apparatus 101 without mounting the battery 124. In any case, the calibration unit 102 does not have a power cable or a communication cable, and can flow along with the secondary battery 150 to the test line, so that the charge / discharge test apparatus 101 can be automatically calibrated.

  In FIG. 3, the charge / discharge circuit block 111 of the charge / discharge test circuit 101 has seven charge / discharge circuits from the charge / discharge circuits CONV1 to CONV7. Each charge / discharge circuit is independently grounded and insulated from each other. For example, the charge / discharge circuit CONV1 includes channels ch1 and ch2 that are commonly grounded. The charge / discharge circuit CONV2 has channels ch3 and ch4 that are commonly grounded, the charge / discharge circuit CONV3 has channels ch5 and ch6 that are commonly grounded, and the charge / discharge circuit CONV4 has channels ch7 and ch8 that are commonly grounded. Have Similarly, the charge / discharge circuit CONV5 has channels ch9 and ch10 that are commonly grounded, and the charge / discharge circuit CONV6 has channels ch11 and ch12 that are commonly grounded. The charge / discharge circuit CONV7 has ch13. The charge / discharge circuits CONV1 to CONV7 are grounded from each other.

  When the calibration test of the discharge circuit is performed on any channel from the ch1 of the charge / discharge circuit CONV1 to the ch6 of the CONV3, the charge / discharge test apparatus 101 is opposed to the charge / discharge circuits CONV1 to CONV3 and grounded. The charge / discharge circuit CONV to be selected is selected. For example, the charging / discharging test apparatus 101 sets any channel from ch7 of the charging / discharging circuit CONV4 to ch13 of CONV7 as the charging / discharging circuit CONV facing the charging circuit. Then, the measurement circuit 201 of the calibration unit 102 measures the discharge voltage or discharge current of any channel ch1 to ch6 set in the discharge circuit. On the contrary, when the calibration test of the charging circuit is performed on any one of the channels ch1 to ch6 of the charging / discharging circuits CONV1 to CONV3, the charging / discharging test apparatus 101 is insulated from the charging / discharging circuits CONV1 to CONV3 and the ground. Opposing charge / discharge circuit CONV is selected. For example, the charge / discharge test apparatus 101 sets one of the channels from ch7 of the charge / discharge circuit CONV4 to ch13 of CONV7 as a discharge circuit as the opposing charge / discharge circuit CONV. Then, the measurement circuit 201 of the calibration unit 102 is connected to the charging voltage or charging current of any one of the channels ch1 to ch6 set in the charging circuit, or any one of the channels ch7 to ch13 set to the discharging circuit. Measure the discharge voltage and discharge current.

  In this way, the charge / discharge test system 100 according to the present embodiment can perform a calibration test of the charge circuit or the discharge circuit on the channels ch1 to ch13 of the charge / discharge circuits CONV1 to CONV7.

  FIG. 4 shows a connection example when the calibration unit 102 calibrates the charge / discharge test apparatus 101. In FIG. 4, blocks having the same reference numerals as those in FIG. 3 have the same or similar functions.

  The charge / discharge test apparatus 101 shown in FIG. 4 depicts the main parts (charge / discharge circuit block 111 and control circuit 112) of the charge / discharge test apparatus 101 shown in FIG. 3, and other parts are omitted. Further, the calibration unit 102 shown in FIG. 4 depicts the main parts (control circuit 120, measurement block 121, wireless slave unit 122) of the calibration unit 102 shown in FIG. 3, and other parts are omitted. . Similarly, the test management apparatus 103 shown in FIG. 4 depicts the main parts (wireless master 132 and personal computer 133) of the test management apparatus 103 shown in FIG. 3, and other parts are omitted.

  In the calibration example described below, the charge / discharge test apparatus 101 opposes the channel ch1 of the charge / discharge circuit CONV1 and the channel ch7 of the charge / discharge circuit CONV4 among the seven charge / discharge circuits CONV of the charge / discharge circuit block 111. Let it work. The channel ch1 of the charging / discharging circuit CONV1 is set to the charging circuit, and the channel ch7 of the charging / discharging circuit CONV4 is set to the discharging circuit. The calibration unit 102 measures the electrical characteristics between the channels ch1 and ch7. At this time, the calibration unit 102 controls the switch array 202 shown in FIG. 3 so that the electrical characteristics between the channel ch1 and the channel ch7 can be measured, and the voltmeter 142, the voltmeter 143, the shunt resistor R1, and The ammeter 141 is connected to an arbitrary place. Note that the voltmeter 142 and the voltmeter 143 may be used by switching one voltmeter as appropriate.

  Here, the charging / discharging circuit CONV can be set as a charging circuit or a discharging circuit by the control circuit 112. In the example of FIG. 4, the channel ch1 of the charging / discharging circuit CONV1 indicates a state set in the charging circuit. Yes. Similarly, the channel ch7 of the charge / discharge circuit CONV4 indicates a state set in the discharge circuit. When the channel ch1 of the charge / discharge circuit CONV1 is set as a discharge circuit, the channel ch1 of the charge / discharge circuit CONV1 is set to the same state as the channel ch7 of the charge / discharge circuit CONV4 of FIG. Similarly, when the channel ch7 of the charging / discharging circuit CONV4 is set as a charging circuit, the channel ch7 of the charging / discharging circuit CONV4 is set to the same state as the channel ch1 of the charging / discharging circuit CONV1 of FIG. The charge / discharge test system 100 according to the present embodiment is set in the same manner as the charge / discharge circuit CONV1 and the charge / discharge circuit CONV4 even when the other charge / discharge circuits CONV2, CONV3, CONV5, CONV6, and CONV7 are calibrated.

  In FIG. 4, the channel ch1 of the charge / discharge circuit CONV1 includes an output circuit 161, an adjustment circuit 162, and D / A (Digital / Analog converters) 165 and 166, and is set as a charging circuit. Further, the channel ch1 of the charge / discharge circuit CONV1 includes a shunt resistor R2, adjustment circuits 163 and 164, and A / D (Analog / Digital converters) 167 and 168, and at the time of charging output from the output circuit 161 Monitor the voltage and current values.

  The shunt resistor R2 is a resistor for converting a current value of an output circuit 161 described later into a voltage value and monitoring it. In the example of FIG. 4, the shunt resistor R2 is arranged in the path on the positive power supply (+) side, but since the grounds of the charge / discharge circuits CONV1 and CONV4 are insulated, the shunt resistor R2 is connected to the negative power supply (−) side. It may be arranged in the route.

  The output circuit 161 outputs the voltage and current adjusted by the adjustment circuit 162 described later. The output circuit 161 converts the power supplied from the power supply circuit 113 shown in FIG. 3 into a desired voltage value and current value, and outputs the converted voltage.

  FIG. 5 shows the operation of the output circuit 161. In FIG. 5A, the output circuit 161 performs a CV (constant voltage) -CC (constant current) operation so as to maintain the rated voltage and rated current set by the control circuit 112. . For example, the control circuit 112 sets the output circuit 161 such that the constant voltage is 5 V and the constant current is 100 A, and the load resistance VRa is variable from the open state (infinity (∞)) to the short state (0Ω). Then, the charging characteristics of the output circuit 161 are tested. FIG. 5B shows changes in the voltage V and the current I when the load resistance VRa is varied from ∞ to 0Ω. In FIG. 5B, the horizontal axis indicates the current I (A), and the vertical axis indicates the voltage V (V). As shown in FIG. 5B, the output circuit 161 performs a charging operation while maintaining a rated voltage (for example, 5V). When the rated current (for example, 100A) is reached, the voltage V drops to 0V, and the charging is finished. To do.

  In FIG. 4, the adjustment circuit 162 adjusts the output circuit 161 so that the voltage setting value at the time of charging and the current setting value at the time of charging given from the control circuit 112 are obtained. Then, an offset and gain for voltage adjustment and an offset and gain for current adjustment are supplied from the control circuit 112.

  Here, offset adjustment and full scale adjustment performed by the control circuit 112 on the adjustment circuit 162 and adjustment circuits 163, 164, 172, 173, and 174 described later will be described. The offset adjustment is a process for adjusting a zero point such as 0V (or 0A). For example, in the offset adjustment, when 0V (or 0A) is set, the offset is obtained so that the actual charge / discharge voltage (or charge / discharge current) of the circuit becomes 0V (or 0A). The full scale adjustment is a process for adjusting to a maximum rated value such as 5 V (or 100 A), for example. For example, the charge / discharge test apparatus 101 obtains a gain corresponding to the slope of the voltage characteristic (or current characteristic) between 0 V (or 0 A) adjusted for offset and 5 V (or 100 A) of the maximum rated value. In the present embodiment, for example, characteristics from 0 V (or 0 A) to 5 V (or 100 A) are treated as straight lines. Therefore, the voltage characteristic (or current characteristic) of the charge / discharge circuit CONV can be calibrated by performing offset adjustment and full scale adjustment of the charge / discharge voltage (or charge / discharge current) of the charge / discharge circuit CONV.

  The adjustment circuit 163 has a circuit for monitoring the current value of the output circuit 161 from the potential difference between both ends of the shunt resistor R2. Then, the control circuit 112 adjusts the current monitoring offset and gain of the adjustment circuit 163 so that the current value to be monitored matches the current value set in the output circuit 161.

  Adjustment circuit 164 has a circuit for monitoring the voltage value during charging output from channel ch1. Then, the control circuit 112 adjusts the voltage monitoring offset and gain of the adjustment circuit 164 so that the voltage value during charging to be monitored matches the voltage value set in the output circuit 161.

  The D / A 165 converts the voltage setting value at the time of charging given as a digital value from the control circuit 112 into an analog signal and outputs the analog signal to the adjustment circuit 162.

  The D / A 166 converts the current setting value at the time of charging given as a digital value from the control circuit 112 into an analog signal and outputs the analog signal to the adjustment circuit 162.

  The A / D 167 converts an analog signal indicating a current value during charging monitored by the adjustment circuit 163 into a digital value and outputs the digital value to the control circuit 112.

  The A / D 168 converts an analog signal indicating a voltage value during charging monitored by the adjustment circuit 164 into a digital value and outputs the digital value to the control circuit 112.

  On the other hand, in FIG. 4, the channel ch7 of the charge / discharge circuit CONV4 set as the discharge circuit has an input circuit 171, an adjustment circuit 172, and D / A 175, 176, and is set as a discharge circuit. Further, the channel ch7 of the charge / discharge circuit CONV4 has a shunt resistor R3, adjustment circuits 173, 174, and A / D 177, 178, and is a voltage value at the time of discharge input to the channel ch7 via the calibration unit 102. And monitor the current value.

  The shunt resistor R3 is a resistor for converting the current value at the time of discharge input to the channel ch7 via the calibration unit 102 into a voltage value and monitoring it. In the example of FIG. 4, the shunt resistor R3 is arranged in the path on the positive power supply (+) side, but since the grounds of the charge / discharge circuits CONV1 and CONV4 are insulated, the shunt resistor R3 is connected to the negative power supply (−) side. It may be arranged in the route.

  The input circuit 171 functions as a load at the time of a discharge test, and is adjusted by an adjustment circuit 172 described later so that a discharge voltage and a discharge current set by the control circuit 112 are obtained. The input circuit 171 has a function of regenerating electrical energy at the time of discharging to the power supply circuit 113 shown in FIG.

  FIG. 6 shows the operation of the input circuit 171. FIG. 6A shows a state where the power source side (secondary battery 150 or charging circuit) shown by an equivalent circuit of the DC power source PS and the internal impedance Z is connected to the input circuit 171. In FIG. 6A, the input circuit 171 performs the CV-CC operation so as to maintain the rated voltage and the rated current set by the control circuit 112. For example, the control circuit 112 sets the input circuit 171 to a constant voltage: 5 V and a constant current: 100 A, and the input circuit 171 performs a discharge test while maintaining 5 V and 100 A. FIG. 6B shows an example of an equivalent circuit of the input circuit 171 in which the constant voltage diode Dv and the constant current diode Da are arranged in parallel. Thus, the input circuit 171 maintains a constant voltage of 5 V and a constant current of 100 A, for example, by the constant voltage diode Dv and the constant current diode Da. In the example of FIG. 6B, the discharge energy becomes heat in each diode, but in reality, the discharge energy is regenerated to the power supply side by the regenerative circuit.

  In FIG. 4, the adjustment circuit 172 adjusts the input circuit 171 so that the discharge voltage setting value and the discharge current setting value given from the control circuit 112 are obtained. Then, an offset and gain for voltage adjustment and an offset and gain for current adjustment are supplied from the control circuit 112.

  The adjustment circuit 173 has a circuit for monitoring a current value at the time of discharging from a potential difference between both ends of the shunt resistor R3. Then, the control circuit 112 adjusts the current monitoring offset and gain of the adjustment circuit 173 so that the current value at the time of discharging to be monitored matches the current value set in the input circuit 171.

  The adjustment circuit 174 has a circuit for monitoring the voltage value at the time of discharging input to the channel ch7. Then, the control circuit 112 adjusts the voltage monitoring offset and gain of the adjustment circuit 174 so that the voltage value at the time of discharging to be monitored matches the voltage value set in the input circuit 171.

  The D / A 175 converts the voltage setting value at the time of discharging given as a digital value from the control circuit 112 into an analog signal and outputs the analog signal to the adjustment circuit 172.

  The D / A 176 converts the discharge current setting value given as a digital value from the control circuit 112 into an analog signal and outputs the analog signal to the adjustment circuit 172.

  The A / D 177 converts an analog signal indicating a current value during discharging monitored by the adjustment circuit 173 into a digital value and outputs the digital value to the control circuit 112.

  The A / D 178 converts an analog signal indicating a voltage value during discharging monitored by the adjustment circuit 174 into a digital value and outputs the digital value to the control circuit 112.

  In this way, the charge / discharge test apparatus 101 operates with the channel ch1 of the charge / discharge circuit CONV1 and the channel ch7 of the charge / discharge circuit CONV4 facing each other among the seven charge / discharge circuits CONV of the charge / discharge circuit block 111. Then, the control circuit 112 sets a voltage value and a current value when charging the channel ch1 of the charge / discharge circuit CONV1 set in the charging circuit, and adjusts the adjustment circuit 162. Further, the control circuit 112 sets the voltage value and the current value at the time of discharging the channel ch7 of the charge / discharge circuit CONV4 set as the discharge circuit, and adjusts the adjustment circuit 172. Further, the control circuit 112 adjusts the offset and gain for voltage adjustment of the adjustment circuit 164 during monitoring so that the voltage value monitored on the charging side matches the voltage setting value of the output circuit 161. Similarly, the control circuit 112 adjusts the offset and gain for current adjustment of the adjustment circuit 163 at the time of monitoring so that the current value monitored on the charging side matches the current setting value of the output circuit 161. Further, the control circuit 112 adjusts the offset and gain for voltage adjustment of the adjustment circuit 174 during monitoring so that the voltage value monitored on the discharge side matches the voltage setting value of the input circuit 171. Similarly, the control circuit 112 adjusts the offset and gain for current adjustment of the adjustment circuit 174 during monitoring so that the current value monitored on the discharge side matches the current setting value of the input circuit 171.

  On the other hand, in FIG. 4, the channel ch1 of the calibration unit 102 is connected to the channel ch1 of the charge / discharge test apparatus 101, and the channel ch7 of the calibration unit 102 is connected to the channel ch7 of the charge / discharge test apparatus 101. In the measurement block 121, the negative power source (−) side of the channel ch1 is connected to the negative power source (−) side of the channel ch7, and the positive power source (+) side of the channel ch1 is the positive power source (+) of the channel ch7. And the shunt resistor R1. Since the grounds of the charge / discharge circuits CONV1 and CONV4 are insulated, the shunt resistor R1 may be disposed on the path on the negative power supply (−) side.

  In the example of FIG. 4, the control circuit 120 monitors the voltage (Vkc) of the positive power supply (+) and the negative power supply (−) of the channel ch1 with the voltmeter 143, and from the wireless slave device 122 to the wireless parent of the test management device 103. To the machine 132. Similarly, the control circuit 120 monitors the voltage (Vkd) of the positive power supply (+) and the negative power supply (−) of the channel ch 7 with the voltmeter 142, and transmits from the wireless slave device 122 to the wireless master device 132 of the test management device 103. Send. The control circuit 120 monitors the current (Ik) flowing through the shunt resistor R1 disposed between the positive power source (+) of the channel ch1 and the positive power source (+) of the channel ch7 with the ammeter 141, and The data is transmitted from the device 122 to the wireless master device 132 of the test management apparatus 103.

  Here, when performing the charge test of the secondary battery 150, the charge / discharge test apparatus 101 sets the charge / discharge circuit CONV as a charge circuit, and monitors the charge voltage and charge current when charging the secondary battery 150. The charging characteristics of the secondary battery 150 are inspected. Alternatively, when performing the discharge test of the secondary battery 150, the charge / discharge test apparatus 101 sets the charge / discharge circuit CONV to the discharge circuit, and monitors the discharge voltage and discharge current when the secondary battery 150 is discharged. The discharge characteristics of the secondary battery 150 are inspected. In this way, the charge / discharge test apparatus 101 inspects the quality of the secondary battery 150. The charge / discharge test system 100 according to the present embodiment is a system that uses the calibration unit 102 to calibrate whether the charging circuit and the discharging circuit of the charge / discharge test apparatus 101 are operating as specified.

  For example, when the charging circuit of the charging / discharging test apparatus 101 is calibrated, the charging / discharging circuit CONV facing the charging circuit is set as the discharging circuit instead of the secondary battery 150 connected to the charging circuit. The calibration unit 102 is connected between the charging circuit and the discharging circuit, measures the charging voltage and charging current of the charging circuit, feeds back the measured value to the charging / discharging test apparatus 101, and calibrates the charging circuit.

  When the discharge circuit of the charge / discharge test apparatus 101 is calibrated, the charge / discharge circuit CONV facing the discharge circuit is set in the charge circuit instead of the secondary battery 150 connected to the discharge circuit. The calibration unit 102 is connected between the discharge circuit and the charge circuit, measures the discharge voltage and discharge current of the discharge circuit, feeds back the measured value to the charge / discharge test apparatus 101, and calibrates the discharge circuit.

  In this way, the calibration unit 102 is connected between the charging circuit and the discharging circuit, measures electrical characteristics such as charging voltage, charging current, discharging voltage, and discharging current, and wirelessly tests and manages each measured value. To the device 103. Then, the test management apparatus 103 outputs each measurement value received from the calibration unit 102 from the personal computer 133 to the control circuit 112 of the charge / discharge test apparatus 101. Based on each measurement value of the calibration unit 102, the control circuit 112 adjusts the electrical characteristics of the charging circuit or discharging circuit to a predetermined specified value. The charge / discharge test apparatus 101 also adjusts measured values of electrical characteristics monitored inside the charge / discharge circuit CONV. Note that the control performed by the personal computer 133 and the control circuit 112 may be performed by either the personal computer 133 or the control circuit 112, and one control unit combining the functions of the personal computer 133 and the control circuit 112 may be provided.

  FIG. 7 shows an example of an input / output circuit and an adjustment circuit of the charge / discharge circuit CONV. 7 is a circuit example of the output circuit 161 (or input circuit 171) and the adjustment circuit 162 (or adjustment circuit 172) shown in FIG. Here, the charge / discharge circuit CONV can be set in the output circuit 161 when operating as a charge circuit, and can be set in the input circuit 171 when operating as a discharge circuit.

  In FIG. 7, the output circuit 161 (or the input circuit 171) has a power supply PW1 supplied from the power supply circuit 113 shown in FIG. 3 and a regenerative inverter INV1. In the case of the output circuit 161, the power supply PW1 supplies power through the regenerative inverter INV1. In the case of the input circuit 171, the regenerative inverter INV1 regenerates electric energy at the time of discharge to the power source PW1. Thereby, compared with the method of performing a discharge test using a radiation resistor, power saving can be achieved. The capacitor C1 is a smoothing capacitor.

  When operating as the output circuit 161, the control circuit 112 outputs the input / output switching signal SEL, switches the switch SW3 to the a side, and provides the output of the adjustment circuit 162 to the switch SW1. Then, the adjustment circuit 162 controls the output voltage and output current by switching the switch SW1. Here, the diode D1 bypasses the reverse current of the coil L1 generated when the switch SW1 is switched. The diode D1 causes a current during discharging to flow to the regenerative inverter INV1, and the regenerative inverter INV1 regenerates electric energy to the power source PW1. The coil L1 functions as a choke coil and smoothes the output power together with the capacitor C2.

  The resistor R11 is a shunt resistor for monitoring the current output from the output circuit 161. The potential difference generated at both ends of the resistor R11 is input to the adjustment circuit 162 and monitored as a current value flowing through the resistor R11.

  The resistors R12 and R13 are resistors for monitoring the voltage output from the output circuit 161. The resistors R12 and R13 are inserted in series between the positive power source (+) and the negative power source (−) of the output circuit 161, and the divided voltage is adjusted. Input to the circuit 162.

  Here, although the above description shows an example of the output circuit 161, when operating as the input circuit 171, the control circuit 112 switches the switch SW3 to the b side by the input / output switching signal SEL, and the output of the adjustment circuit 172 is changed. Apply to switch SW2. Then, the adjustment circuit 172 controls the input voltage and input current during discharging by switching the switch SW2. Here, the diode D2 bypasses the reverse current generated when the switch SW2 is switched.

  In this way, the control circuit 112 switches the switch SW3 according to the input / output switching signal SEL, and sets each channel ch of the charge / discharge circuit CONV to the output circuit 161 or the input circuit 171.

  Next, the adjustment circuit 162 or the adjustment circuit 172 will be described. In FIG. 7, the adjustment circuit 162 or the adjustment circuit 172 includes an operational amplifier OP1, an operational amplifier OP2, an operational amplifier OP3, a diode D3, a diode D4, a comparator CMP1, a resistor R14, and a sawtooth oscillator GEN1.

  The operational amplifier OP1 detects a potential difference generated between both ends of the resistor R11 as a current value during charging or discharging. The resistor R11 is, for example, a shunt resistor for current measurement whose resistance value is on the order of milliohms, and a voltage drop due to the resistor R11 can be ignored.

  The operational amplifier OP2 outputs a difference between the current value detected by the operational amplifier OP1 and the current value set by the control circuit 112.

  The operational amplifier OP3 outputs a difference between the voltage value detected by the resistors R12 and R13 and the voltage value set by the control circuit 112. The resistance values of the resistors R12 and R13 are, for example, in the order of mega ohms, and the current flowing through the resistors R12 and R13 can be ignored.

  The diode D3 and the diode D4 are pulled up to the power supply voltage Vcc by the resistor R14, and obtain the logical sum of the outputs of the operational amplifier OP2 and the operational amplifier OP3. The logical sum output from the diode D3 and the diode D4 is input to the comparator CMP1.

  The comparator CMP1 compares a sawtooth wave output from a sawtooth oscillator GEN1 described later with a logical sum output of the diode D3 and the diode D4, and outputs a rectangular wave. When the output of the operational amplifier OP2 or the operational amplifier OP3 is reduced, the positive period of the rectangular wave output from the comparator CMP1 is increased. Conversely, when the output of the operational amplifier OP2 or the operational amplifier OP3 is increased, the positive period of the rectangular wave output from the comparator CMP1 is shortened. Here, the positive period of the rectangular wave output from the comparator CMP1 corresponds to the period during which the switch SW1 or the switch SW2 is closed.

  The sawtooth oscillator GEN1 is an oscillator that outputs a sawtooth wave having a preset period.

  In this way, the control circuit 112 controls the output voltage and the output current (or the input voltage and the input current) by changing the ratio of turning on and off the switch SW1 (or the switch SW2).

  Here, the operational amplifier OP2 and the operational amplifier OP3 are fed back from the output terminal to the input terminal by the variable resistor VR1 for adjusting the amplification factor, as indicated by the dotted balloon portion in FIG. The variable resistor VR <b> 1 is used for gain adjustment for varying the voltage (or current) and is controlled by the control circuit 112. In gain adjustment, when the gain is increased, the voltage (or current) increases, and when the gain is decreased, the voltage (or current) decreases. The operational amplifier OP2 and the operational amplifier OP3 are connected to a variable resistor VR2 for adjusting the offset of the output signal. The variable resistor VR2 is used for adjusting the offset of the voltage (or current) and is controlled by the control circuit 112. The offset adjustment is controlled by the control circuit 112 so that the actual output becomes 0 V (or 0 A) when the voltage (or current) is set to 0 V (or 0 A). In this way, the control circuit 112 controls the variable resistor VR1 and the variable resistor VR2 to adjust the charging voltage or charging current of the output circuit 161 and the discharging voltage or discharging current of the input circuit 171. The adjustment is performed by a voltage setting value, a current setting value, a gain / offset for voltage adjustment, a gain / offset for current adjustment, and the like given from the control circuit 112.

  Similarly, the adjustment circuits 163 and 164 shown in FIG. 4 have the monitor voltage adjustment gain (Gc) / offset (OFc) and the monitor current adjustment gain (Gd) / offset (OFd) given from the control circuit 112. Are adjusted respectively.

  FIG. 8 shows an example of the adjustment circuits 163 and 164.

  In FIG. 8, the adjustment circuit 163 includes an operational amplifier OP11, a variable resistor VR11, and a variable resistor VR12. The operational amplifier OP11 detects a potential difference generated at both ends of the shunt resistor R2 as a current value output from the output circuit 161. The operational amplifier OP11 can adjust the gain (Gc) by the variable resistor VR11, and the variable resistor VR11 is controlled by the control circuit 112, similarly to the operational amplifier OP3 shown in FIG. The operational amplifier OP11 is connected to a variable resistor VR12 for adjusting the offset (OFc) of the output signal, similarly to the operational amplifier OP3 shown in FIG. 7, and the variable resistor VR12 is controlled by the control circuit 112. In this way, the adjustment circuit 163 adjusts the magnitude of the current value detected by the shunt resistor R2 and outputs it to the A / D 167. The A / D 167 converts the analog current value into a digital current value (Icm). The data is converted and output to the control circuit 112.

  In FIG. 8, the adjustment circuit 164 includes an operational amplifier OP12, a variable resistor VR21, and a variable resistor VR22. The operational amplifier OP12 detects a voltage value between the positive power supply (+) and the negative power supply (−) of the channel ch1. Similarly to the operational amplifier OP11, the operational amplifier OP12 can adjust the gain (Gd) by the variable resistor VR21 and the offset (OFd) by the variable resistor VR22. The variable resistors VR21 and VR22 are controlled by the control circuit 112. In this way, the adjustment circuit 164 adjusts the magnitude of the voltage value between the positive power source (+) and the negative power source (−) of the channel ch1 and outputs the voltage value to the A / D 168. The A / D 168 Is converted into a digital voltage value (Vcm) and output to the control circuit 112.

  The adjustment circuit 173 shown in FIG. 4 has the same circuit as the adjustment circuit 163 shown in FIG. 8, detects the value of the current flowing through the shunt resistor R3 instead of the shunt resistor R2, and uses the A / D 177 for digital The current value (Idm) converted into a value is output to the control circuit 112. Similarly to the adjustment circuit 163, the adjustment circuit 173 can vary the magnitude of the detected current value by the offset (OFg) and the gain (Gg), and is controlled by the control circuit 112.

  The adjustment circuit 174 shown in FIG. 4 has the same circuit as the adjustment circuit 164 shown in FIG. 8, and has a large voltage value between the positive power supply (+) and the negative power supply (−) of the channel ch7. Adjust the height and output to A / D178. The A / D 178 converts an analog voltage value into a digital voltage value (Vdm) and outputs the digital voltage value to the control circuit 112. The adjustment circuit 174 can vary the magnitude of the detected voltage value by the offset (OFh) and the gain (Gh), and is controlled by the control circuit 112, similarly to the adjustment circuit 164.

In this manner, the control circuit 112 adjusts the charging voltage or charging current of the output circuit 161 and the discharging voltage or discharging current of the input circuit 171 by the adjusting circuit 162 and the adjusting circuit 172. Further, the control circuit 112 adjusts the monitoring value of the charging voltage or charging current and the monitoring value of the discharging voltage or discharging current of the input circuit 171 by the adjustment circuits 163, 164, 173, and 174.
[Offset adjustment of charging voltage and measured value of charging voltage]
FIG. 9 shows an example of processing for offset adjustment of the charging voltage and the measured value of the charging voltage.

  9 is a process executed by the control circuit 112 of the charge / discharge test apparatus 101, the control circuit 120 of the calibration unit 102, and the personal computer 133 of the test management apparatus 103. Here, when the test management apparatus 103 is integrated with the charge / discharge test apparatus 101, the flowchart of FIG. 9 is executed by the control circuit 112 of the charge / discharge test apparatus 101 and the control circuit 120 of the calibration unit 102. . The same applies to the flowcharts of FIGS. 10 to 16 described later.

  In step S101, the control circuit 112 sets the channel ch1 of the charge / discharge circuit CONV1 to the charging circuit. For example, when the charging circuit is set, the control circuit 112 switches the switch SW3 to the a side by the input / output switching signal SEL and operates the channel ch1 of the charging / discharging circuit CONV1 as the output circuit 161 as shown in FIG. .

  In step S102, the control circuit 112 sets a charging voltage (Vc). Since the offset adjustment is performed in the example of FIG. 9, the control circuit 112 sets Vc = 0V.

  In step S103, the control circuit 112 sets an offset (OFa) of the charging voltage. For example, the control circuit 112 sets OFa = maximum value as the initial value of the offset. The maximum value is a value that can be set in terms of a circuit. For example, when the charging voltage is 5V, the maximum value is set to a value such as 0.2V.

  In step S <b> 104, the control circuit 112 acquires the measurement voltage (Vkc) of the voltmeter 143 of the channel ch <b> 1 from the calibration unit 102 via the test management apparatus 103.

  In step S105, the control circuit 112 determines whether or not Vkc = 0V. If Vkc = 0V, the process proceeds to step S106. If Vkc = 0V, the process proceeds to step S107. Whether or not the measurement voltage (Vkc) is 0 V may be determined by whether or not it is within a predetermined range (for example, a range of ± 0.001 V).

  In step S <b> 106, the control circuit 112 adjusts the charging voltage offset (OFa) of the adjustment circuit 162. For example, when OFa = maximum value is set, the control circuit 112 gradually changes OFa to a smaller value. And the control circuit 112 returns to the process of step S104 after the process of step S106.

  Here, in the following description, in the offset and gain adjustment, the offset and gain are gradually changed according to the initial values, and the offset and gain adjustment values that meet the conditions of step S105 are obtained. For example, the control circuit 112 gradually changes from the maximum value to a smaller value when the initial value of OFa is set to the maximum value, and gradually increases from the minimum value when the initial value of OFa is set to the minimum value. Change to a larger value.

  In step S107, the control circuit 112 stores the adjustment value of the offset (OFa) of the charging voltage when the measurement voltage (Vkc) becomes 0V as the adjustment value of CONV1. For example, when the charge voltage offset (OFa) when Vkc = 0V is OFa1, the adjustment value is OFa1. The adjustment value OFa1 is used as an offset for the voltage of the adjustment circuit 162 when the charge test of the secondary battery 150 is performed.

  The adjustment of the offset (OFa) of the charging voltage (Vc) by the adjustment circuit 162 is completed by the processing from steps S101 to S107. Subsequently, the control circuit 112 adjusts the offset (OFd) of the monitor voltage (Vcm) of the charging voltage by the adjustment circuit 164.

  In step S108, the control circuit 112 measures the monitor voltage (Vcm) between the positive power supply (+) and the negative power supply (−) of the channel ch1 by the adjustment circuit 164.

  In step S109, the control circuit 112 determines whether or not Vcm = 0V. If Vcm = 0V is not satisfied, the process proceeds to step S110. If Vcm = 0V, the process proceeds to step S111. Note that whether or not the monitor voltage (Vcm) is 0 V may be determined by whether or not the monitor voltage (Vcm) is within a range near 0 V, similarly to the measurement voltage (Vkc) in step S105.

  In step S110, the control circuit 112 adjusts the offset (OFd) of the monitor voltage (Vcm) of the adjustment circuit 164. Then, the control circuit 112 returns to the process of step S108 after the process of step S110.

  In step S111, the control circuit 112 stores the adjustment value of the offset (OFd) of the monitor voltage when the monitor voltage (Vcm) becomes 0V as the adjustment value of CONV1. For example, if the monitor voltage offset (OFd) when Vcm = 0V is OFd1, the adjustment value is OFd1. The adjustment value OFd1 is used as an offset of the adjustment circuit 164 when the charge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs offset adjustment of the charging voltage and the measured value of the charging voltage.
[Full scale adjustment of charging voltage and measured value of charging voltage]
FIG. 10 shows a processing example of the full scale adjustment of the charging voltage and the measured value of the charging voltage.

  In step S201, the control circuit 112 sets the channel ch1 of the charge / discharge circuit CONV1 to the charging circuit. When the full scale adjustment shown in FIG. 10 is performed after the offset adjustment shown in FIG. 9, the channel ch1 of the charging / discharging circuit CONV1 is already set in the charging circuit, so this process may be omitted.

  In step S202, the control circuit 112 sets a charging voltage (Vc). Since the full scale adjustment is performed in the example of FIG. 10, the control circuit 112 sets, for example, the maximum rated value Vc = 5V.

  In step S <b> 203, the control circuit 112 acquires the measurement voltage (Vkc) of the voltmeter 143 of the channel ch <b> 1 from the calibration unit 102 via the test management apparatus 103.

  In step S204, the control circuit 112 determines whether or not Vkc = Vc. If Vkc = Vc, the process proceeds to step S205, and if Vkc = Vc, the process proceeds to step S206. Whether or not the measurement voltage (Vkc) is Vc may be determined based on whether or not the measurement voltage (Vkc) is in a predetermined range (for example, a range of Vc ± 0.001 V).

  In step S <b> 205, the control circuit 112 adjusts the gain (Ga) of the charging voltage of the adjustment circuit 162. For example, the control circuit 112 makes Ga larger than the current value when Vkc <Vc, and makes Ga smaller than the current value when Vkc> Vc. Then, the control circuit 112 returns to the process of step S203 after the process of step S205.

  In step S206, the control circuit 112 stores the adjustment value of the gain (Ga) of the charging voltage when the measurement voltage (Vkc) becomes Vc as the adjustment value of CONV1. For example, when the gain (Ga) of the charging voltage when Vkc = Vc is Ga1, the adjustment value is Ga1. The adjustment value Ga1 is used as a voltage gain of the adjustment circuit 162 when the charge test of the secondary battery 150 is performed.

  With the processing from step S201 to step S206, the adjustment of the gain (Ga) of the charging voltage (Vc) by the adjustment circuit 162 is completed. Subsequently, the control circuit 112 adjusts the gain (Gd) of the monitor voltage (Vcm) of the charging voltage by the adjustment circuit 164.

  In step S207, the control circuit 112 measures the monitor voltage (Vcm) between the positive power supply (+) and the negative power supply (−) of the channel ch1 by the adjustment circuit 164.

  In step S208, the control circuit 112 determines whether or not Vcm = Vc. If Vcm = Vc, the process proceeds to step S209. If Vcm = Vc, the process proceeds to step S210. Note that whether or not the monitor voltage (Vcm) is Vc may be determined by whether or not the monitor voltage (Vcm) is in the vicinity of Vc, similarly to the measured voltage (Vkc) in step S204.

  In step S209, the control circuit 112 adjusts the gain (Gd) of the monitor voltage (Vcm) of the adjustment circuit 164. For example, the control circuit 112 makes Gd larger than the current value when Vcm <Vc, and makes Gd smaller than the current value when Vcm> Vc.

  In step S210, the control circuit 112 stores the adjustment value of the gain (Gd) of the monitor voltage when the monitor voltage (Vcm) becomes Vc as the adjustment value of CONV1. For example, when the gain (Gd) of the monitor voltage when Vcm = Vc is Gd1, the adjustment value is Gd1. The adjustment value Gd1 is used as the gain of the adjustment circuit 164 when the charge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs full-scale adjustment of the charging voltage and the measured value of the charging voltage.
[Offset adjustment of discharge current and measured value of discharge current]
FIG. 11 shows a processing example of the offset adjustment of the discharge current and the measured value of the discharge current.

  In step S301, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 as a charging circuit and the channel ch7 of the charging / discharging circuit CONV4 as a discharging circuit. As shown in FIG. 7, when setting the charging circuit, the control circuit 112 switches the switch SW3 to the a side by the input / output switching signal SEL and operates as the output circuit 161 shown in FIG. Conversely, when setting the discharge circuit, the control circuit 112 switches the switch SW3 to the b side by the input / output switching signal SEL and operates as the input circuit 171 shown in FIG.

  In step S302, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. Since the offset adjustment is performed in the example of FIG. 11, the control circuit 112 sets Vc> Vd and Ic> Id = 0A. For example, the control circuit 112 sets Vc = 5.1V, Ic = 101A, Vd = 5.0V, Id = 0A.

  In step S <b> 303, the control circuit 112 acquires the measurement current (Ik) of the ammeter 141 of the channel ch <b> 1 from the calibration unit 102 via the test management device 103.

  In step S304, the control circuit 112 determines whether or not Ik = 0A. If Ik = 0A, the process proceeds to step S305. If Ik = 0A, the process proceeds to step S306. Whether or not the measured current (Ik) is 0 A may be determined based on whether or not the measured current (Ik) is in a predetermined range (for example, a range of ± 0.001 A).

  In step S305, the control circuit 112 adjusts the offset (OFf) of the discharge current of the adjustment circuit 172 with respect to the input circuit 171 of the channel ch7 of the charge / discharge circuit CONV4. Then, the control circuit 112 returns to the process of step S303 after the process of step S305.

  In step S306, the control circuit 112 stores the adjustment value of the discharge current offset (OFf) when the measured current (Ik) becomes 0 A as the adjustment value of CONV4. For example, when the offset (OFf) of the discharge current when Ik = 0 A is OFf1, the adjustment value is OFf1. The adjustment value OFf1 is used as an offset for current of the adjustment circuit 172 when the discharge test of the secondary battery 150 is performed.

  With the processing from step S301 to step S306, the adjustment of the offset (OFf) of the discharge current (Id) by the adjustment circuit 172 is completed. Subsequently, the control circuit 112 adjusts the offset (OFg) of the monitor current (Idm) of the discharge current by the adjustment circuit 173.

  In step S307, the control circuit 112 measures the monitor current (Idm) flowing through the shunt resistor R3 by the adjustment circuit 173.

  In step S308, the control circuit 112 determines whether Idm = 0A. If Idm = 0A, the process proceeds to step S309. If Idm = 0A, the process proceeds to step S310. Whether or not the monitor current (Idm) is 0 A may be determined by whether or not the monitor current (Idm) is within the range near 0 A, similarly to the measured current (Ik) in step S304.

  In step S309, the control circuit 112 adjusts the offset (OFg) of the monitor current (Idm) of the adjustment circuit 173. Then, the control circuit 112 returns to the process of step S307 after the process of step S309.

  In step S310, the control circuit 112 stores the adjustment value of the monitor current when the monitor current (Idm) becomes 0 A as the adjustment value of CONV4. For example, when the offset (OFg) when Idm = 0A is OFg1, the adjustment value is OFg1. The adjustment value OFg1 is used as an offset of the adjustment circuit 173 when the discharge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs offset adjustment of the discharge current and the measured value of the discharge current.
[Full scale adjustment of discharge current and measured value of discharge current]
FIG. 12 shows a processing example of the full-scale adjustment of the discharge current and the measured value of the discharge current.

  In step S401, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 to the charging circuit and the channel ch7 of the charging / discharging circuit CONV4 to the discharging circuit, similarly to step S301.

  In step S402, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. In the example of FIG. 12, since full scale adjustment is performed, the control circuit 112 sets Vc> Vd and Ic> Id. For example, the control circuit 112 sets Vc = 5.1V, Ic = 101A, Vd = 5.0V, Id = 100A.

  In step S 403, the control circuit 112 acquires the measurement current (Ik) of the ammeter 141 of the channel ch 1 from the calibration unit 102 via the test management apparatus 103.

  In step S404, the control circuit 112 determines whether Ik = Id, and if not Ik = Id, the process proceeds to step S405, and if Ik = Id, the process proceeds to step S406. Whether or not the measurement current (Ik) is Id may be determined based on whether or not it is within a predetermined range (for example, a range of Id ± 0.001 A).

  In step S405, the control circuit 112 adjusts the gain (Gf) of the discharge current of the adjustment circuit 172 with respect to the input circuit 171 of the channel ch7 of the charge / discharge circuit CONV4. Then, the control circuit 112 returns to the process of step S403 after the process of step S405.

  In step S406, the control circuit 112 stores the adjustment value of the gain (Gf) of the discharge current when Ik = Id as the adjustment value of CONV4. For example, when the gain (Gf) of the discharge current when Ik = Id is Gf1, the adjustment value is Gf1. The adjustment value Gf1 is used as a current gain of the adjustment circuit 172 when the discharge test of the secondary battery 150 is performed.

  The adjustment of the gain (Gf) of the discharge current (Id) by the adjustment circuit 172 is completed by the processing from steps S401 to S406. Subsequently, the control circuit 112 adjusts the gain (Gg) of the monitor current (Idm) of the discharge current by the adjustment circuit 173.

  In step S407, the control circuit 112 measures the monitor current (Idm) flowing through the shunt resistor R3 by the adjustment circuit 173.

  In step S408, the control circuit 112 determines whether or not Idm = Id. If Idm = Id, the process proceeds to step S409. If Idm = Id, the process proceeds to step S410. Whether or not Idm = Id may be determined based on whether or not Idm is within a predetermined range based on Id, as in step S404.

  In step S409, the control circuit 112 adjusts the gain (Gg) of the monitor current (Idm). Then, the control circuit 112 returns to the process of step S407 after the process of step S409.

  In step S410, the control circuit 112 stores the adjustment value of the gain (Gg) of the monitor current when Idm = Id as the adjustment value of CONV4. For example, when the gain (Gg) of the monitor current when Idm = Id is Gg1, the adjustment value is Gg1. The adjustment value Gg1 is used as a gain of the adjustment circuit 173 when the discharge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs full-scale adjustment of the discharge current and the measured value of the discharge current.
[Offset adjustment of charging current and measured value of charging current]
FIG. 13 shows a processing example of the offset adjustment of the charging current and the measured value of the charging current.

  In step S501, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 as a charging circuit and the channel ch7 of the charging / discharging circuit CONV4 as a discharging circuit.

  In step S502, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. Since the offset adjustment is performed in the example of FIG. 13, the control circuit 112 sets Vc> Vd and Ic = 0A <Id. For example, the control circuit 112 sets Vc = 5.1V, Ic = 0A, Vd = 5.0V, Id = 101A.

  In step S <b> 503, the control circuit 112 acquires the measurement current (Ik) of the ammeter 141 of the channel ch <b> 1 from the calibration unit 102 via the test management apparatus 103.

  In step S504, the control circuit 112 determines whether or not Ik = 0A. If Ik = 0A, the process proceeds to step S505. If Ik = 0A, the process proceeds to step S506. Whether or not the measured current (Ik) is 0 A may be determined based on whether or not the measured current (Ik) is in a predetermined range (for example, a range of ± 0.001 A).

  In step S505, the control circuit 112 adjusts the offset (OFb) of the charging current of the adjustment circuit 162 with respect to the output circuit 161 of the channel ch1 of the charge / discharge circuit CONV1. Then, the control circuit 112 returns to the process of step S503 after the process of step S505.

  In step S506, the control circuit 112 stores the adjustment value of the offset (OFb) of the charging current when the measured current (Ik) becomes 0A as the adjustment value of CONV1. For example, when the charging current offset (OFb) when Ik = 0 A is OFb1, the adjustment value is OFb1. The adjustment value OFb1 is used as an offset for the current of the adjustment circuit 162 when the secondary battery 150 is charged.

  By the processing from step S501 to S506, the adjustment of the offset (OFb) of the charging current (Ic) by the adjustment circuit 162 is completed. Subsequently, the control circuit 112 adjusts the offset (OFc) of the monitor current (Icm) of the charging current by the adjustment circuit 163.

  In step S507, the control circuit 112 measures the monitor current (Icm) flowing through the shunt resistor R2 by the adjustment circuit 163.

  In step S508, the control circuit 112 determines whether or not Icm = 0A. If Icm = 0A, the process proceeds to step S509. If Icm = 0A, the process proceeds to step S510. Note that whether or not the monitor current (Icm) is 0 A may be determined by whether or not the monitor current (Icm) is within the range near 0 A, similarly to the measured current (Ik) in step S504.

  In step S509, the control circuit 112 adjusts the offset (OFc) of the monitor current (Icm) of the adjustment circuit 163. Then, the control circuit 112 returns to the process of step S507 after the process of step S509.

  In step S510, the control circuit 112 stores the adjustment value of the monitor current when the monitor current (Icm) becomes 0 A as the adjustment value of CONV1. For example, when the offset (OFc) when Icm = 0A is OFc1, the adjustment value is OFc1. The adjustment value OFc1 is used as an offset of the adjustment circuit 163 when the charge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs offset adjustment of the charging current and the measured value of the charging current.
[Full scale adjustment of charging current and measured value of charging current]
FIG. 14 shows a processing example of the full scale adjustment of the charging current and the measured value of the charging current.

  In step S601, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 to the charging circuit and the channel ch7 of the charging / discharging circuit CONV4 to the discharging circuit, similarly to step S501.

  In step S602, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. Since full scale adjustment is performed in the example of FIG. 14, the control circuit 112 sets Vc> Vd and Ic <Id. For example, the control circuit 112 sets Vc = 5.1V, Ic = 100A, Vd = 5.0V, Id = 101A.

  In step S <b> 603, the control circuit 112 acquires the measurement current (Ik) of the ammeter 141 of the channel ch <b> 1 from the calibration unit 102 via the test management apparatus 103.

  In step S604, the control circuit 112 determines whether Ik = Ic. If Ik = Ic, the process proceeds to step S605. If Ik = Ic, the process proceeds to step S606. Whether or not the measured current (Ik) is Ic is determined to be Ik = Ic when it is within a predetermined range (for example, a range of Ic ± 0.001 A). Good.

  In step S605, the control circuit 112 adjusts the gain (Gb) of the charging current of the adjustment circuit 162 for the output circuit 161 of the channel ch1 of the charge / discharge circuit CONV1. Then, the control circuit 112 returns to the process of step S603 after the process of step S605.

  In step S606, the control circuit 112 stores the adjustment value of the gain (Gb) of the charging current when Ik = Ic as the adjustment value of CONV1. For example, when the gain (Gb) of the charging current when Ik = Ic is Gb1, the adjustment value is Gb1. The adjustment value Gb1 is used as a current gain of the adjustment circuit 162 when the charge test of the secondary battery 150 is performed.

  With the processing from step S601 to S606, the adjustment of the gain (Gb) of the charging current (Ic) by the adjustment circuit 162 is completed. Subsequently, the control circuit 112 adjusts the gain (Gc) of the monitor current (Icm) of the charging current by the adjustment circuit 163.

  In step S607, the control circuit 112 measures the monitor current (Icm) flowing through the shunt resistor R2 by the adjustment circuit 163.

  In step S608, the control circuit 112 determines whether Icm = Ic. If Icm = Ic, the process proceeds to step S609. If Icm = Ic, the process proceeds to step S610. Whether or not Icm = Ic may be determined based on whether or not Icm is within a predetermined range based on Ic, as in step S604.

  In step S609, the control circuit 112 adjusts the gain (Gc) of the monitor current (Icm). Then, the control circuit 112 returns to the process of step S607 after the process of step S609.

  In step S610, the control circuit 112 stores the adjustment value of the gain (Gc) of the monitor current when Icm = Ic as the adjustment value of CONV1. For example, when the gain (Gc) of the monitor current when Icm = Ic is Gc1, the adjustment value is Gc1. The adjustment value Gc1 is used as the gain of the adjustment circuit 163 when the charge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs full-scale adjustment of the charging current and the measured value of the charging current.
[Offset adjustment of discharge voltage and measured value of discharge voltage]
FIG. 15 shows a processing example of the offset adjustment of the discharge voltage and the measured value of the discharge voltage.

  In step S701, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 as a charging circuit and the channel ch7 of the charging / discharging circuit CONV4 as a discharging circuit.

  In step S702, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. Since the offset adjustment is performed in the example of FIG. 15, the control circuit 112 sets Vc> Vd (a minute voltage that can be operated) and Ic <Id. For example, the control circuit 112 sets Vc = 5.1V, Ic = 100A, Vd = 50mV, Id = 101A. Although Vd is ideally set to 0 V, there may be a case where a minute voltage is required for the charge / discharge test apparatus 101 to perform a CC (Constant Current) operation. Therefore, in this embodiment, Vd is set to a voltage that is 1% of a full-scale voltage (maximum rated voltage), for example. In the above example, since the maximum rated voltage is 5V, Vd is set to 50 mV, which is 1% of 5V.

  In step S703, the control circuit 112 acquires the measurement voltage (Vkd) of the voltmeter 142 of the channel ch7 from the calibration unit 102 via the test management apparatus 103.

  In step S704, the control circuit 112 determines whether Vkd = 50 mV. If Vkd = 50 mV, the process proceeds to step S705. If Vkd = 50 mV, the process proceeds to step S706. Note that whether or not Vkd = 50 mV may be determined based on whether or not Vkd is within a predetermined range (for example, a range of 50 mV ± 0.1 mV).

  In step S705, the control circuit 112 adjusts the offset (OFe) of the discharge voltage of the adjustment circuit 172 with respect to the input circuit 171 of the channel ch7 of the charge / discharge circuit CONV4. Then, the control circuit 112 returns to the process of step S703 after the process of step S705.

  In step S706, the control circuit 112 stores the adjustment value of the discharge voltage offset (OFe) when Vkd = 50 mV as the adjustment value of CONV4. For example, when the discharge voltage offset (OFe) when Vkd = 50 mV is OFe1, the adjustment value is OFe1. The adjustment value OFe1 is used as an offset for the voltage of the adjustment circuit 172 when the discharge test of the secondary battery 150 is performed.

  By the processing from step S701 to S706, the adjustment of the offset (OFe) of the discharge voltage (Vd) by the adjustment circuit 172 is completed. Subsequently, the control circuit 112 adjusts the offset (OFh) of the monitor voltage (Vdm) of the discharge voltage by the adjustment circuit 174.

  In step S707, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. Since the offset adjustment is performed in the example of FIG. 15, the control circuit 112 sets (operable minute voltage) Vc> Vd and Ic <Id. For example, the control circuit 112 sets Vc = 50 mV, Ic = 100A, Id = 101A. Note that Vd is smaller than 50 mV, and the charge / discharge test apparatus 101 is in a CC operation state. Further, Vc is given a minute voltage for the charge / discharge test apparatus 101 to perform CC operation. In this embodiment, for example, Vc is set to 1% of full-scale voltage. In the above example, Vc is set to 50 mV, which is a 1% voltage of 5V.

  In step S708, the control circuit 112 causes the adjustment circuit 174 to measure the monitor voltage (Vdm) between the positive power supply (+) and the negative power supply (−) of the channel ch7.

  In step S709, the control circuit 112 determines whether Vdm = 50 mV. If Vdm = 50 mV, the process proceeds to step S710. If Vdm = 50 mV, the process proceeds to step S711. Note that whether or not the monitor voltage (Vdm) is 50 mV may be determined based on whether or not the monitor voltage (Vdm) is within a range in the vicinity of 50 mV, as in step S704.

  In step S710, the control circuit 112 adjusts the offset (OFh) of the monitor voltage (Vdm) of the adjustment circuit 173. Then, the control circuit 112 returns to the process of step S708 after the process of step S710.

  In step S711, the control circuit 112 stores the adjustment value of the monitor voltage when Vdm = 50 mV as the adjustment value of CONV4. For example, when the offset (OFh) when Vdm = 50 mV is OFh1, the adjustment value is OFh1. The adjustment value OFh1 is used as an offset of the adjustment circuit 174 when the discharge test of the secondary battery 150 is performed.

Thus, the charge / discharge test system 100 according to the present embodiment performs offset adjustment of the discharge voltage and the measured value of the discharge voltage.
[Full scale adjustment of discharge voltage and measured value of discharge voltage]
FIG. 16 shows a processing example of the full scale adjustment of the discharge voltage and the measured value of the discharge voltage.

  In step S801, the control circuit 112 sets the channel ch1 of the charging / discharging circuit CONV1 as a charging circuit and the channel ch7 of the charging / discharging circuit CONV4 as a discharging circuit.

  In step S802, the control circuit 112 sets a charging voltage (Vc) and a charging current (Ic), and a discharging voltage (Vd) and a discharging current (Id), respectively. In the example of FIG. 16, the control circuit 112 sets Vc> Vd and Ic <Id. For example, the control circuit 112 sets Vc = 5.1V, Ic = 100A, Vd = 5.0V, Id = 101A.

  In step S803, the control circuit 112 acquires the measurement voltage (Vkd) of the voltmeter 142 of the channel ch7 from the calibration unit 102 via the test management apparatus 103.

  In step S804, the control circuit 112 determines whether or not Vkd = Vd. If Vkd = Vd is not satisfied, the process proceeds to step S805. If Vkd = Vd, the process proceeds to step S806. Note that whether or not Vkd = Vd may be determined based on whether or not Vkd is within a predetermined range (for example, a range of Vd ± 0.001 V).

  In step S805, the control circuit 112 adjusts the gain (Ge) of the discharge voltage of the adjustment circuit 172 with respect to the input circuit 171 of the channel ch7 of the charge / discharge circuit CONV4. Then, the control circuit 112 returns to the process of step S803 after the process of step S805.

  In step S806, the control circuit 112 stores the adjustment value of the gain (Ge) of the discharge voltage when Vkd = 50 mV as the adjustment value of CONV4. For example, when the gain (Ge) of the discharge voltage when Vkd = 50 mV is Ge1, the adjustment value is Ge1. The adjustment value Ge1 is used as a voltage gain of the adjustment circuit 172 when the discharge test of the secondary battery 150 is performed.

  By the processing from step S801 to S806, the adjustment of the gain (Ge) of the discharge voltage (Vd) by the adjustment circuit 172 is completed. Subsequently, the control circuit 112 adjusts the gain (Gh) of the monitor voltage (Vdm) of the discharge voltage by the adjustment circuit 174.

  In step S807, the control circuit 112 measures the monitor voltage (Vdm) between the positive power supply (+) and the negative power supply (−) of the channel ch7 by the adjustment circuit 174.

  In step S808, the control circuit 112 determines whether or not Vdm = Vd. If Vdm = Vd is not satisfied, the process proceeds to step S809. If Vdm = Vd, the process proceeds to step S810. Note that whether or not the monitor voltage (Vdm) is Vd may be determined by whether or not Vdm is in the vicinity of Vd, as in step S804.

  In step S809, the control circuit 112 adjusts the gain (Gh) of the monitor voltage (Vdm) of the adjustment circuit 173. Then, the control circuit 112 returns to the process of step S807 after the process of step S809.

  In step S810, the control circuit 112 stores the adjustment value of the monitor voltage when Vdm = Vd as the adjustment value of CONV4. For example, when the gain (Gh) when Vdm = Vd is Gh1, the adjustment value is Gh1. The adjustment value Gh1 is used as a gain of the adjustment circuit 174 when the discharge test of the secondary battery 150 is performed.

  Thus, the charge / discharge test system 100 according to the present embodiment performs full-scale adjustment of the discharge voltage and the measured value of the discharge voltage.

  As described above, the charge / discharge test system 100 according to the present embodiment flows the calibration unit 102 having the same or similar terminal as the secondary battery 150 to the test line of the secondary battery 150. When the calibration unit 102 is connected instead of the secondary battery 150, the charge / discharge test apparatus 101 sets the opposite charge / discharge circuit CONV to the charge circuit and the discharge circuit, and A calibration unit 102 is arranged between them. The calibration unit 102 measures the charging voltage, the charging current, the discharging voltage, and the discharging current, and transmits each measured value to the test management apparatus 103 and the charging / discharging test apparatus 101 wirelessly. In this way, the test management apparatus 103 and the charge / discharge test apparatus 101 can adjust the charging circuit and the discharging circuit based on the measurement value received wirelessly from the calibration unit 102.

  From the above detailed description, features and advantages of the embodiments will become apparent. This is intended to cover the features and advantages of the embodiments described above without departing from the spirit and scope of the claims. Also, any improvement and modification should be readily conceivable by those having ordinary knowledge in the art. Therefore, there is no intention to limit the scope of the inventive embodiments to those described above, and appropriate modifications and equivalents included in the scope disclosed in the embodiments can be used.

DESCRIPTION OF SYMBOLS 100 ... Charge / discharge test system; 101, 101a1, 101a2, 101a3, 101b1, 101b2, 101b3, 101c1, 101c2, 101c3 ... Charge / discharge test apparatus; 102a, 102b, 102c ... Calibration unit; 103 ... Test management device; 111 ... Charge / discharge circuit block; 112 ... Control circuit; 113 ... Power supply circuit; 117,118,151 ... 120: Control circuit; 121 ... Measurement block; 122 ... Wireless slave unit; 123 ... Auxiliary power supply circuit; 124 ... Battery; 131 ... HUB; 133 ... PC; 141 ... ammeter; 142, 143 ... voltmeter; 1 0 ... secondary battery; 160 ... standby rack; 161 ... output circuit; 162, 163, 164, 172, 173, 174 ... adjustment circuit; 165, 166, 175, 176 ... D 167, 168, 177, 178 ... A / D; 171 ... input circuit; 191 ... RFID tag; 192 ... RFID reader; 201 ... measurement circuit; Array; C1, C2 ... Capacitor; CMP1 ... Comparator; CONV ... Charge / discharge circuit; D1, D2, D3, D4 ... Diode; GEN1 ... Saw wave oscillator; INV1 ... Regenerative inverter L1, ... Coil; OP1, OP2, OP3, OP11, OP12 ... Operational amplifier; PW1 ... Power supply; R1, R2, R3 ... Shunt resistor; R11, R12 R13, R14 · · · resistance; SEL · · · O switching signal; SW1, SW2, SW3 ··· switch; VR1, VR2, VR11, VR12, VR21, VR22 ··· variable resistor

Claims (9)

In a charge / discharge test system having a charge / discharge test apparatus for performing a charge / discharge test of a secondary battery, and a calibration unit for calibrating the charge / discharge test apparatus,
The charge / discharge test apparatus includes at least one charging circuit, at least one discharging circuit facing the charging circuit, and measured values measured by the calibration unit disposed between the charging circuit and the discharging circuit. A first communication unit that receives wirelessly, and a control unit that adjusts the charging circuit and the discharging circuit based on the measurement value;
The calibration unit has a shape that can be arranged in the charge / discharge test apparatus instead of the secondary battery, and has a test terminal arranged at the same position as the power supply terminal of the secondary battery. A measuring unit that connects the test terminal to the charge / discharge test device instead of the power supply terminal of a secondary battery, and measures electrical characteristics of the charge circuit and the discharge circuit of the charge / discharge test device; and the measurement unit A charge / discharge test system comprising: a second communication unit that wirelessly transmits the measured value measured by the to the charge / discharge test apparatus. The charge / discharge test system according to claim 1,
The charging circuit and the discharging circuit have an adjustment unit that adjusts a circuit for setting a charging / discharging voltage and a charging / discharging current with an offset and a gain,
The control unit controls an offset and a gain of the adjustment unit so that the measurement value received from the calibration unit matches a predetermined set value. The charge / discharge test system according to claim 1,
The charging circuit and the discharging circuit have a monitor adjustment unit that adjusts monitor values of charge / discharge voltage and charge / discharge current by offset and gain,
The control unit controls an offset and a gain of the monitor adjustment unit so that the monitor values of the charging circuit and the discharging circuit match predetermined setting values. At least one charging circuit;
At least one discharge circuit facing the charging circuit;
A first communication unit that wirelessly receives a measurement value measured by a calibration unit disposed between the charging circuit and the discharging circuit;
A charge / discharge test apparatus comprising: a control unit that adjusts the charge circuit and the discharge circuit based on the measured value. The charge / discharge test apparatus according to claim 4,
The charging circuit and the discharging circuit have an adjustment unit that adjusts a circuit for setting a charging / discharging voltage and a charging / discharging current with an offset and a gain,
The charge / discharge test apparatus, wherein the control unit controls an offset and a gain of the adjustment unit so that the measurement value received from the calibration unit matches a predetermined set value. The charge / discharge test apparatus according to claim 4,
The charging circuit and the discharging circuit have a monitor adjustment unit that adjusts monitor values of charge / discharge voltage and charge / discharge current by offset and gain,
The control unit controls an offset and a gain of the monitor adjustment unit so that the monitor values of the charging circuit and the discharging circuit match predetermined setting values. In a calibration method for calibrating a charge / discharge test apparatus for performing a charge / discharge test of a secondary battery using a calibration unit,
The charge / discharge test apparatus wirelessly receives measurement values measured by a calibration unit disposed between the charge circuit and the discharge circuit, with at least one charge circuit and at least one discharge circuit facing each other. , Adjusting the charging circuit and the discharging circuit based on the measured value,
The calibration unit has a shape that can be arranged in the charge / discharge test apparatus instead of the secondary battery, and has a test terminal arranged at the same position as the power supply terminal of the secondary battery. Instead of the power supply terminal of the secondary battery, the test terminal is connected to the charge / discharge test apparatus, the electrical characteristics of the charge circuit and the discharge circuit of the charge / discharge test apparatus are measured, and the measured values are wirelessly determined. A calibration method comprising: transmitting to the charge / discharge test apparatus. The calibration method according to claim 7, wherein
Controlling the offset and gain of the circuit for setting the charging / discharging voltage and charging / discharging current of the charging circuit and the discharging circuit so that the measured value received from the calibration unit matches a predetermined setting value. A calibration method characterized. The calibration method according to claim 7, wherein
The offset and gain of the circuit that monitors the charge / discharge voltage and charge / discharge current are controlled so that the monitor value of the circuit that monitors the charge / discharge voltage and charge / discharge current matches a predetermined set value. Calibration method.

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