JP6460854B2 - Charge / discharge test system, calibration unit and calibration method - Google Patents

Description

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

  In recent years, for example, secondary batteries have been used in various fields ranging from large devices such as electric vehicles, nighttime response of solar cell systems, and emergency storage batteries during disasters to small devices such as mobile phones. The manufacturer of the secondary battery maintains the quality of the secondary battery by performing a charge test and a discharge test using a charge / discharge test apparatus. In addition, the manufacturer can regularly check whether the electrical characteristics of the charge / discharge test equipment used for the secondary battery test meet the test specifications by using the calibration unit so that the proper performance can be maintained. (See, for example, Patent Document 1).

JP2013-106450A

  However, since the conventional calibration unit is equipped with a device and a circuit for measuring the charge / discharge voltage and charge / discharge current of the charge / discharge test apparatus and feeding back to the charge / discharge test apparatus side, there is a problem that miniaturization is difficult. . For example, when a calibration unit of the same shape as the secondary battery is inserted into the secondary battery to be tested and passed through the charge / discharge test line, a communication circuit that feeds back the measurement equipment and measurement results to the charge / discharge test device side is reduced in size. It is difficult to mount in a casing having the same shape as the secondary battery.

  The charge / discharge test system, calibration unit, and calibration method disclosed herein provide a technology that can calibrate a charge / discharge test device with passive components that are simpler than the prior art, without mounting a measuring instrument or the like on the calibration unit. The purpose is to do.

  According to one aspect, a charge / discharge test apparatus including a charge / discharge test apparatus that includes positive / negative charge / discharge terminals, and performs a charge / discharge test by connecting the positive / negative charge / discharge terminals to positive / negative power terminals of a secondary battery, respectively. In a charge / discharge test system having a calibration unit that is alternatively connected to a secondary battery with respect to the charge / discharge test apparatus for calibration, the calibration unit is located at a position corresponding to the positive and negative power supply terminals of the secondary battery. The positive and negative test terminals connectable to the positive and negative charge / discharge terminals, respectively, and the passive circuit arranged between the positive test terminal and the negative test terminal. A reference battery that outputs a resistor or a reference voltage connected between the terminal and the negative test terminal, and the charge / discharge test device measures the voltage value of the passive circuit of the calibration unit to measure the constant voltage measurement accuracy and constant voltage. Setting accuracy, constant current measurement accuracy and constant voltage Setting performing at least one calibration accuracy.

According to one aspect, in order to calibrate a charge / discharge test apparatus that performs a charge / discharge test by connecting positive / negative charge / discharge terminals to positive / negative power terminals of a secondary battery, In a calibration unit that is alternatively connected to the battery, a positive / negative test terminal that is disposed at a position corresponding to the positive / negative power supply terminal of the secondary battery and can be connected to the positive / negative charge / discharge terminal, and a positive test terminal, Has a second positive test terminal, a second negative test terminal different from the negative test terminal, and a passive circuit disposed between the positive test terminal and the negative test terminal. The second positive test terminal is connected to the passive circuit by a wiring different from the wiring connected from the positive test terminal to the passive circuit, and the second negative test terminal is passively connected from the negative test terminal. the wire connected to the circuit is connected to the passive circuit by another wire, the passive circuit is a positive A reference cell for outputting a resistance or the reference voltage is connected between the test terminal and the negative test terminal.

  According to one aspect, a charge / discharge test apparatus including a charge / discharge test apparatus that includes positive / negative charge / discharge terminals, and performs a charge / discharge test by connecting the positive / negative charge / discharge terminals to positive / negative power terminals of a secondary battery, respectively. A calibration method in a charge / discharge test system having a calibration unit that is alternatively connected to a secondary battery with respect to a charge / discharge test apparatus for calibration, wherein the calibration unit is a positive / negative power source for the secondary battery. A positive and negative test terminal that is disposed at a position corresponding to the terminal and can be connected to the positive and negative charge / discharge terminals, and a passive circuit that is disposed between the positive test terminal and the negative test terminal. Is a reference battery that outputs a resistor or a reference voltage connected between the positive test terminal and the negative test terminal, and the charge / discharge test device measures the voltage value of the passive circuit of the calibration unit to make a constant voltage Measurement accuracy, constant voltage setting accuracy, constant ammeter Performing at least one calibration accuracy and constant current setting accuracy.

  The charge / discharge test system, the calibration unit, and the calibration method disclosed in the present disclosure can calibrate the charge / discharge test apparatus with passive components that are simpler than those of the prior art, without mounting a measuring device or the like on the calibration unit.

It is a figure which shows an example of a charging / discharging test system. It is a figure which shows the other example of a charging / discharging test system. It is a figure which shows the example of a connection of a secondary battery. It is a figure which shows an example of the charging / discharging test system of a comparative example. It is a figure which shows the example of a connection of VM calibration magazine. It is a figure which shows the example of a connection of a CV calibration magazine. It is a figure which shows the example of a connection of CC calibration magazine. It is a figure which shows an example of the calibration procedure of constant voltage measurement precision. It is a figure which shows an example of the calibration procedure of constant voltage setting precision. It is a figure which shows an example of the calibration procedure of constant current measurement precision and constant current setting precision.

Hereinafter, embodiments will be described with reference to the drawings.
(Charge / Discharge Test System 100)
FIG. 1 shows an example of a charge / discharge test system 100 according to the present embodiment. In FIG. 1, the charge / discharge test system 100 includes a charge / discharge test apparatus 101, a calibration unit 102 a, and a personal computer 103. Here, the personal computer 103 operates as a test management apparatus, and controls the charge / discharge test apparatus 101 and stores measurement data. Alternatively, the personal computer 103 stores the result of the calibration test of the charge / discharge test apparatus 101, the calibration history, and the like. The personal computer 103 may be included in the charge / discharge test apparatus 101. Further, an RFID (Radio Frequency IDentification) tag 191 storing individual identification information (manufacturing number, serial number, etc.) is attached to the calibration unit 102a. The charge / discharge test apparatus 101 reads the individual identification information of the RFID tag 191 by the RFID reader 192 and notifies the personal computer 103 of it. The personal computer 103 identifies the connected calibration unit 102 a based on the individual identification information notified from the charge / discharge test apparatus 101. The personal computer 103 manages the calibration result for each calibration unit 102a. Note that the RFID tag 191 is also attached to a secondary battery 150 to be described later, and the personal computer 103 stores the result of the charge / discharge test for each secondary battery 150.

Here, the calibration unit 102 a described in the present embodiment can be applied when the operator manually calibrates the calibration unit 102 by connecting the calibration unit 102 to the charge / discharge test apparatus 101, but is charged when the secondary battery 150 is manufactured. Suitable for use in test lines that automatically perform discharge tests. In the test line, for example, the secondary battery 150 is carried in front of the charge / discharge test apparatus 101 by a belt conveyor or the like, and the terminal of the charge / discharge test apparatus 101 and the terminal of the secondary battery 150 are automatically connected. For example, the terminal position of the probe of the charge / discharge test apparatus 101 and the terminal position of the secondary battery 150 are the same, and in the test line, the charge / discharge test apparatus is driven by a drive unit that presses the probe against the secondary battery 150. The terminal 101 and the terminal of the secondary battery 150 are connected. The charge / discharge test system 100 according to the present embodiment is based on the premise that the calibration unit 102 having the same or similar size and terminal position as the case of the secondary battery 150 is crossed with the secondary battery 150 and flows to the test line. For this reason, it is required to match the casing size of the calibration unit 102 to the secondary battery 150. In the case of the secondary battery 150 having a small casing size, the casing of the calibration unit 102 is set according to the casing size of the secondary battery 150. The body size also needs to be reduced.
(Charge / discharge test apparatus 101)
1, a charge / discharge test apparatus 101 includes a charge / discharge circuit 201, a shunt resistor 202, a voltmeter 203, a voltmeter 204, a voltmeter 205, a control circuit 206, and an F / B (Feed / Back) circuit 207.

  The charge / discharge circuit 201 has a charge mode and a discharge mode. The charge mode is a test mode for performing a charge test, and the charge / discharge circuit 201 applies a preset charge voltage and charge current to the secondary battery 150 or the calibration unit 102a. The discharge mode is a test mode when a discharge test is performed, and the charge / discharge circuit 201 controls the discharge voltage and the discharge current set in advance from the secondary battery 150 or the calibration unit 102a.

  The shunt resistor 202 is a resistor for measuring a charging current or a discharging current flowing between the charging / discharging circuit 201 and the secondary battery 150 or the calibration unit 102a. The resistance value of the shunt resistor 202 is, for example, about 10 mΩ.

  The voltmeter 203 measures a voltage value generated at both ends of the shunt resistor 202. The voltage value measured by the voltmeter 203 corresponds to the current value of the charging current or the current value of the discharging current.

  The voltmeter 204 is connected between the positive electrode charging / discharging terminal 110 and the negative electrode charging / discharging terminal 111. The operator can check the voltage value applied from the charge / discharge test apparatus 101 to the secondary battery 150 or the calibration unit 102a by the voltmeter 204. In the example of FIG. 1, the positive electrode charging / discharging terminal 110 is connected to the positive electrode tab 120 of the calibration unit 102a by the wiring 130a. Further, the negative electrode charging / discharging terminal 111 is connected to the negative electrode tab 121 of the calibration unit 102a by the wiring 130b. Note that the wiring 130 a and the wiring 130 b are collectively referred to as a wiring 130. The wiring 130 is a wiring for flowing a charging / discharging current from the charging / discharging test apparatus 101 to the secondary battery 150 or the calibration unit 102a. For example, a current of about 30 A flows.

  The voltmeter 205 measures the voltage between the terminals of the secondary battery 150 or the calibration unit 102a. In the example of FIG. 1, the positive monitor terminal 112 of the voltmeter 205 is connected to the positive electrode tab 120 of the calibration unit 102a by the wiring 131a, and the negative electrode monitor terminal 113 of the voltmeter 205 is connected to the negative electrode tab 121 of the calibration unit 102a by the wiring 131b. Is done. Note that the wiring 131a and the wiring 131b are collectively referred to as a wiring 131.

  The control circuit 206 sets the charge / discharge circuit 201 to the charge mode or the discharge mode based on a command from the personal computer 103. In addition, the control circuit 206 acquires the measured value of the charge / discharge voltage from the F / B circuit 207 during the charge / discharge test or calibration of the secondary battery 150 and notifies the personal computer 103 of the measurement value. Alternatively, the control circuit 206 causes the F / B circuit 207 to start a calibration operation when receiving a calibration test command from the personal computer 103. The control circuit 206 notifies the personal computer 103 of the individual identification information read by the RFID reader 192.

  The F / B circuit 207 controls the charge / discharge circuit 201 based on the measurement value input from the voltmeter 203 or the voltmeter 205. Here, in the present embodiment, the F / B circuit 207 and the control circuit 206 are described as separate blocks, but the F / B circuit 207 and the control circuit 206 may be combined into one block.

When the charge / discharge test of the secondary battery 150 is performed, the personal computer 103 instructs the test circuit 206 to the control circuit 206 of the charge / discharge test apparatus 101 to acquire the test result of the secondary battery 150. The personal computer 103 stores the test result for each individual identification information of the secondary battery 150 notified from the control circuit 206 in a storage medium such as a hard disk. Further, during the calibration test of the charge / discharge test apparatus 101, the personal computer 103 issues a calibration test command to the control circuit 206 of the charge / discharge test apparatus 101 to acquire the result of the calibration test. The personal computer 103 stores the result of the calibration test of the charge / discharge test apparatus 101 in a storage medium such as a hard disk. When the personal computer 103 is also connected to another charge / discharge test apparatus 101 via a LAN (Local Area Network), the personal computer 103 stores the result of the calibration test for each charge / discharge test apparatus 101.
(Calibration unit 102a)
In FIG. 1, the calibration unit 102 a has a passive circuit 300. The passive circuit 300 includes passive components including, for example, any of a reference battery, a termination resistor, and a shunt resistor. The passive circuit 300 differs depending on the type of calibration test, and a different calibration unit 102a is used for each type of calibration test.

  Here, in FIG. 1, since the charge / discharge current flows through the wiring 130, a voltage drop corresponding to the magnitude of the charge / discharge current occurs. For example, when the charge / discharge current increases, the voltage drop due to the wiring 130 increases, and when the charge / discharge current decreases, the voltage drop due to the wiring 130 decreases. For this reason, the voltage value measured by the voltmeter 204 may be different from the voltage value between the terminals of the secondary battery 150 or the calibration unit 102a. On the other hand, the voltmeter 205 is connected to the secondary battery 150 or the calibration unit 102a by the monitor wiring 131, and the current flowing through the wiring 131 is negligibly small compared to the charge / discharge current. That is, since the voltage drop of the wiring 131 connecting the voltmeter 205 to the secondary battery 150 or the calibration unit 102a is reduced, the voltmeter 205 accurately determines the voltage value between the terminals of the secondary battery 150 and the calibration unit 102a. It can be measured.

  FIG. 2 shows another example of the calibration unit 102a shown in FIG. Here, the calibration unit 102 a shown in FIG. 1 has two terminals, a positive electrode tab 120 and a negative electrode tab 121. On the other hand, the calibration unit 102b shown in FIG. 2 has four independent terminals, a positive electrode tab 120a, a positive electrode tab 120b, a negative electrode tab 121a, and a negative electrode tab 121b. The positive electrode tab 120 and the negative electrode tab 121 shown in FIG. 1 are called common tabs, and the positive electrode tab 120a and the positive electrode tab 120b shown in FIG. 2 are called independent tabs. Similarly, the negative electrode tab 121a and the negative electrode tab 121b shown in FIG. 2 are independent tabs.

  Here, in the following description, when the matters common to the calibration unit 102a and the calibration unit 102b are described, the alphabet at the end of the code is omitted and the calibration unit 102 is described. In addition, when referring to the specific calibration unit 102, an alphabet is added to the end of the code, and it is expressed as a calibration unit 102a. The same applies to a calibration unit 102c, a calibration unit 102d, a calibration unit 102e, a calibration unit 102f, a calibration unit 102g, and a calibration unit 102h, which will be described later.

  In FIG. 2, the positive electrode charge / discharge terminal 110 of the charge / discharge test apparatus 101 is connected to the positive electrode tab 120a of the calibration unit 102b by a wiring 130a. Further, the negative electrode charge / discharge terminal 111 of the charge / discharge test apparatus 101 is connected to the negative electrode tab 121a of the calibration unit 102b by a wiring 130b. On the other hand, the positive electrode monitor terminal 112 of the charge / discharge test apparatus 101 is connected to the positive electrode tab 120b of the calibration unit 102b by the wiring 131a. Further, the negative electrode monitor terminal 113 of the charge / discharge test apparatus 101 is connected to the negative electrode tab 121b of the calibration unit 102b by a wiring 131b. In the calibration unit 102b, the positive electrode tab 120b and the negative electrode tab 121b are directly connected to the inside of the passive circuit 300 separately from the positive electrode tab 120a and the negative electrode tab 121a. Thereby, the voltmeter 204 can measure the voltage value inside the passive circuit 300 with higher accuracy than the calibration unit 102a shown in FIG. The reason is as follows. The calibration unit 102a shown in FIG. 1 has the same wiring between the positive electrode tab 120 and the passive circuit 300. On the other hand, in the calibration unit 102b shown in FIG. 2, the wiring between the positive electrode tab 120a and the passive circuit 300 and the wiring between the positive electrode tab 120b and the passive circuit 300 are independent. The current flowing through the wiring between the positive electrode tab 120b and the passive circuit 300 is smaller than the charge / discharge current flowing through the wiring between the positive electrode tab 120a and the passive circuit 300. Therefore, the voltage drop between the positive electrode tab 120 b and the passive circuit 300 is smaller than that between the positive electrode tab 120 a and the passive circuit 300. Similarly, in the calibration unit 102b, the wiring between the negative electrode tab 121a and the passive circuit 300 and the wiring between the negative electrode tab 121b and the passive circuit 300 are independent. The current flowing through the wiring between the negative electrode tab 121b and the passive circuit 300 is smaller than the charge / discharge current flowing through the wiring between the negative electrode tab 121a and the passive circuit 300. Therefore, the voltage drop between the negative electrode tab 121 b and the passive circuit 300 is smaller than that between the negative electrode tab 121 a and the passive circuit 300. That is, since the voltage drop of the wiring connecting the voltmeter 205 to the passive circuit 300 is reduced, the voltmeter 205 measures the internal voltage value of the passive circuit 300 with higher accuracy than in the case of FIG. Can do.

  FIG. 3 shows an example in which the secondary battery 150 is connected to the charge / discharge test apparatus 101. In FIG. 3, the positive electrode tab 122 of the secondary battery 150 is connected to the positive electrode charge / discharge terminal 110 of the charge / discharge test apparatus 101, and the negative electrode tab 123 of the secondary battery 150 is connected to the negative electrode charge / discharge terminal 111 of the charge / discharge test apparatus 101. Is done. In FIG. 3, the positive electrode monitor terminal 112 and the negative electrode monitor terminal 113 are connected when monitoring the voltage between the positive electrode tab 122 and the negative electrode tab 123 of the secondary battery 150.

As described above, the charge / discharge test apparatus 101 according to the present embodiment can perform the charge / discharge test when the secondary battery is connected, and can perform the calibration test when the calibration unit 102 is connected.
(Charge / Discharge Test System 900 of Comparative Example)
Here, a comparative example of the charge / discharge test system 100 according to the present embodiment will be described.

  FIG. 4 shows a charge / discharge test system 900 of a comparative example. The charge / discharge test system 900 includes a charge / discharge test apparatus 901, a calibration unit 902, a personal computer 801, and a wireless master device 802.

  In FIG. 4, the calibration unit 902 includes a measurement circuit 951, a control circuit 952, a wireless slave device 953, and a battery 954. The measurement circuit 951 includes a circuit that measures a voltage between the positive electrode tab 920 and the negative electrode tab 921 and a circuit that measures a current flowing from the positive electrode tab 920 to the negative electrode tab 921. The control circuit 952 monitors the voltage value of the charge / discharge voltage measured by the measurement circuit 951. Alternatively, the control circuit 952 monitors the charge / discharge current value measured by the measurement circuit 951. The wireless slave device 953 transmits information on the voltage value or current value monitored by the control circuit 952 to the wireless master device 802. The battery 954 supplies power necessary for the operation of the measurement circuit 951, the control circuit 952, and the wireless slave device 953. As a result, the calibration unit 902 does not require a power cord for supplying power or a communication cable for communicating with the personal computer 801, and therefore can be carried freely.

  On the other hand, the personal computer 801 receives the voltage value of the charge / discharge voltage and the current value of the charge / discharge current transmitted from the wireless slave device 953 of the calibration unit 902 via the wireless master device 802. For example, the personal computer 801 notifies the charge / discharge test apparatus 901 of the voltage value of the charge / discharge voltage or the current value of the charge / discharge current received from the calibration unit 902. The charge / discharge test apparatus 901 includes, for example, the charge / discharge test apparatus 101 so that the difference between the set voltage value of the charge / discharge voltage and the voltage value of the charge / discharge voltage notified from the personal computer 801 falls within a preset allowable range. Calibrate the setting accuracy of the charge / discharge voltage output from. Alternatively, the charge / discharge test apparatus 901 performs, for example, a charge / discharge test so that the difference between the set current value of the charge / discharge current and the current value of the charge / discharge current notified from the personal computer 801 falls within a preset allowable range. The setting accuracy of the charge / discharge current output from the apparatus 101 is calibrated. Note that calibration of the measurement accuracy of the charge / discharge test apparatus 901 is required to be periodically performed on the measurement circuit 951 of the calibration unit 902.

  Thus, the charge / discharge test system 900 of the comparative example calibrates the charge / discharge test apparatus 901 by wirelessly transmitting the measurement value of the calibration unit 902 from the calibration unit 902 to the personal computer 801. For this reason, the calibration unit 902 of the comparative example is equipped with a measurement circuit 951, a control circuit 952, a wireless slave device 953, a battery 954, and the like, and there is a problem that it is difficult to reduce the size. For example, since the casing size of the secondary battery 150 for automobiles or home use is larger than that of the secondary battery 150 for portable devices or the like, like the calibration unit 902, the measurement circuit 951, the control circuit 952, the wireless device A machine 953, a battery 954, and the like can be mounted. However, since the housing size of the secondary battery 150 such as a portable device is smaller than that of the secondary battery 150 such as an automobile, the measurement circuit 951, the control circuit 952, the wireless slave device 953, the battery 954, and the like are mounted in the housing. It ’s difficult.

  On the other hand, the calibration unit 102 according to this embodiment does not include the measurement circuit 951, the control circuit 952, the wireless slave device 953, the battery 954, and the like, and performs calibration using the passive circuit 300 illustrated in FIG. It can be carried out. The passive circuit 300 feeds back the measurement points of the charge / discharge voltage and charge / discharge current to the charge / discharge test apparatus 101 side via the wiring 131, and the charge / discharge test apparatus 101 directly calculates the voltage value at the measurement point inside the calibration unit 102. measure. The charge / discharge test apparatus 101 performs calibration based on the voltage value fed back from the calibration unit 102.

As described above, in this embodiment, the charge / discharge test apparatus 101 directly measures a voltage value at a measurement point inside the calibration unit 102. Therefore, the passive circuit 300 only needs to have a circuit that feeds back the voltage at the measurement point to the charge / discharge test apparatus 101 side via the wiring 131, and there is no need to mount a circuit like the calibration unit 902 shown in FIG. become. Thereby, the calibration unit 102 can be made smaller than the calibration unit 902.
(Calibration of constant voltage measurement accuracy)
FIG. 5 shows an example of the calibration unit 102 with constant voltage measurement accuracy. Here, the calibration unit 102 with constant voltage measurement accuracy is referred to as a VM (Voltage Measurement) calibration magazine 102c. The VM calibration magazine 102c shown in FIG. 5A corresponds to the common tab calibration unit 102a shown in FIG. 1 and includes a positive electrode tab 120 and a negative electrode tab 121. Further, the VM calibration magazine 102d shown in FIG. 5B corresponds to the independent tab calibration unit 102b shown in FIG. 2, and includes a positive electrode tab 120a, a negative electrode tab 121a, a positive electrode tab 120b, and a negative electrode tab 121b.

  In FIG. 5A, the VM calibration magazine 102c is used to calibrate the voltage value measured by the voltmeter 205 of the charge / discharge test apparatus 101. The VM calibration magazine 102 c includes a reference battery 301 between the positive electrode tab 120 and the negative electrode tab 121. The reference battery 301 is a battery that outputs a predetermined reference voltage. Here, the predetermined reference voltage is set according to the calibration content of the charge / discharge test apparatus 101, such as a voltage of 10 mV or less, a voltage of about 5 V to 500 V, and the like. In the present embodiment, a calibration test with a reference voltage of 10 mV or less is referred to as a calibration test with low voltage measurement accuracy. A calibration test with a reference voltage of about 5V to 500V is referred to as a calibration test with high voltage measurement accuracy. In the present embodiment, a plurality of VM calibration magazines 102c are prepared according to the reference voltage. For example, a low voltage measurement accuracy VM calibration magazine 102c and a high voltage measurement accuracy VM calibration magazine 102c are used.

  When calibration is started, as shown in FIG. 5A, for example, a VM calibration magazine 102 c in which a reference battery 301 having a voltage of 10 mV is mounted is connected to the charge / discharge test apparatus 101. The charge / discharge test apparatus 101 reads the individual identification information of the RFID tag 191 of the VM calibration magazine 102 c by the RFID reader 192 and notifies the personal computer 103 of it. The personal computer 103 recognizes that the VM calibration magazine 102c is connected based on the individual identification information received from the charge / discharge test apparatus 101, and controls the charge / discharge test apparatus 101 to calibrate the constant voltage measurement accuracy. To instruct. The control circuit 206 may recognize the connection of the VM calibration magazine 102c and calibrate the constant voltage measurement accuracy without notifying the personal computer 103 from the charge / discharge test apparatus 101.

  The control circuit 206 starts a calibration test and sets the charge / discharge circuit 201 to an off state. Thereby, although the voltmeter 204 is connected between the positive electrode charging / discharging terminal 110 and the negative electrode charging / discharging terminal 111, it will be in a substantially open state. Then, the control circuit 206 instructs the F / B circuit 207 to calibrate the voltage value read from the voltmeter 205. The F / B circuit 207 determines whether or not the voltage value read from the voltmeter 205 is the reference voltage (for example, 10 mV) of the reference battery 301. When the difference between the voltage value read from the voltmeter 205 and the reference voltage of the reference battery 301 is not within a predetermined allowable range, the F / B circuit 207 reads the voltage value read from the voltmeter 205 as an offset. Correct. Thereafter, until the next calibration is performed, the F / B circuit 207 treats the voltage value read from the voltmeter 205 by the offset amount as the voltage value read from the secondary battery 150 or the calibration unit 102.

  Here, the calibration test of the constant voltage measurement accuracy includes the calibration of the low voltage measurement accuracy in which the reference voltage of the reference battery 301 is 10 mV or less and the high voltage measurement in which the reference voltage of the reference battery 301 is about 5 V to 500 V (for example, 30 V). Both accuracy calibrations are performed. This is because, for example, the accuracy of the voltmeter 205 at a low voltage of 10 mV may differ from the accuracy of the voltmeter 205 at a high voltage of 30 V, for example.

  In this way, calibration of the constant voltage measurement accuracy of the charge / discharge test apparatus 101 was performed using the VM calibration magazine 102c shown in FIG. 5A, and the secondary battery 150 was connected to the charge / discharge test apparatus 101. Sometimes the accuracy of the voltage value read by the voltmeter 205 can be maintained.

On the other hand, the VM calibration magazine 102d shown in FIG. 5B has a reference battery 301 between the positive electrode tab 120a and the negative electrode tab 121a. The VM calibration magazine 102d is different from the VM calibration magazine 102c in that the positive electrode of the reference battery 301 is connected to the positive electrode tab 120b by the wiring 140, and the negative electrode of the reference battery 301 is connected to the negative electrode tab 121b by the wiring 141. . The positive electrode monitor terminal 112 of the voltmeter 205 is connected to the positive electrode tab 120b by the wiring 131a, and the negative electrode monitor terminal 113 of the voltmeter 205 is connected to the negative electrode tab 121b by the wiring 131b. Thereby, the voltmeter 205 can directly read the voltage across the reference battery 301. In the case of calibration of constant voltage measurement accuracy, no charge / discharge current flows through the wiring 130. For this reason, the accuracy of the voltage value of the reference battery 301 read by the voltmeter 205 when the VM calibration magazine 102d is connected, and the VM calibration magazine 102c of the common tab shown in FIG. There is almost no difference from the accuracy of the read voltage value of the reference battery 301. Accordingly, the constant voltage measurement accuracy calibration test may be performed using either the VM calibration magazine 102c or the VM calibration magazine 102d.
(Calibration of constant voltage setting accuracy)
FIG. 6 shows an example of the calibration unit 102 with constant voltage setting accuracy. Here, the calibration unit 102 having the constant voltage setting accuracy is referred to as a CV (Constant Voltage) calibration magazine 102e or a CV calibration magazine 102f. A CV calibration magazine 102e shown in FIG. 6A corresponds to the common tab calibration unit 102a shown in FIG. 1 and includes a positive electrode tab 120 and a negative electrode tab 121. Further, the CV calibration magazine 102f shown in FIG. 6B corresponds to the independent tab calibration unit 102b shown in FIG. 2, and includes a positive electrode tab 120a, a negative electrode tab 121a, a positive electrode tab 120b, and a negative electrode tab 121b.

  The CV calibration magazine 102e and the CV calibration magazine 102f are used to calibrate voltage values in the constant voltage test mode (CV test mode) of the charge / discharge test apparatus 101. For example, in FIG. 6A, when the CV calibration magazine 102e is connected to the charge / discharge test apparatus 101, the charge / discharge test apparatus 101 reads the individual identification information of the RFID tag 191 of the CV calibration magazine 102e by the RFID reader 192. To the PC 103. The personal computer 103 recognizes that the CV calibration magazine 102e is connected based on the individual identification information received from the charge / discharge test apparatus 101, and controls the charge / discharge test apparatus 101 to calibrate the constant voltage setting accuracy. To instruct. Here, the control circuit 206 may recognize the connection of the CV calibration magazine 102e and calibrate the constant voltage measurement accuracy without notifying the personal computer 103 from the charge / discharge test apparatus 101.

  In FIG. 6A, the CV calibration magazine 102 e has a termination resistor 302 connected between the positive electrode tab 120 and the negative electrode tab 121. As the termination resistor 302, a high resistance (for example, about several MΩ) that hardly flows current compared to the shunt resistor 202 that measures current is used. The termination resistor 302 terminates a constant voltage (for example, 5V or 300V) applied between the positive electrode tab 120 and the negative electrode tab 121. The voltage value at both ends of the termination resistor 302 is output as a voltage value between the positive electrode tab 120 and the negative electrode tab 121. The positive electrode tab 120 is connected to the positive electrode monitor terminal 112 of the charge / discharge test apparatus 101 by the wiring 131a, and the negative electrode tab 121 is connected to the negative electrode monitor terminal 113 of the charge / discharge test apparatus 101 by the wiring 131b. Accordingly, the voltmeter 205 can measure the voltage value at both ends of the termination resistor 302 as the voltage value between the positive monitor terminal 112 and the negative monitor terminal 113.

  In FIG. 6A, when the calibration test in the CV test mode is started, the control circuit 206 sets the charge / discharge circuit 201 to the CV test mode. In response to this, the charge / discharge circuit 201 outputs a preset constant voltage (for example, 5 V). The voltage output from the charge / discharge circuit 201 is output between the positive electrode charge / discharge terminal 110 and the negative electrode charge / discharge terminal 111 via the shunt resistor 202. The positive electrode charging / discharging terminal 110 is connected to the positive electrode tab 120 of the CV calibration magazine 102e by the wiring 130a, and the negative electrode charging / discharging terminal 111 is connected to the negative electrode tab 121 of the CV calibration magazine 102e by the wiring 130b. Thereby, the voltage output between the positive electrode charging / discharging terminal 110 and the negative electrode charging / discharging terminal 111 is given to both ends of the termination resistor 302 connected between the positive electrode tab 120 and the negative electrode tab 121 of the CV calibration magazine 102e. It is done.

  Here, if the voltage drop due to the wiring inside the CV calibration magazine 102 e is ignored, the voltage value of the voltage applied to both ends of the termination resistor 302 is equal to the voltage value between the positive electrode tab 120 and the negative electrode tab 121. A voltage value between the positive electrode tab 120 and the negative electrode tab 121 is measured by the voltmeter 205 as a voltage value between the positive electrode monitor terminal 112 and the negative electrode monitor terminal 113 connected by the wiring 131.

  The control circuit 206 instructs the F / B circuit 207 to calibrate the constant voltage setting accuracy in the CV test mode. The F / B circuit 207 determines whether or not the voltage value read from the voltmeter 205 is a preset voltage (for example, 5 V) in the CV test mode. When the difference between the voltage value read from the voltmeter 205 and the voltage value set in the CV test mode is not within a predetermined allowable range, the F / B circuit 207 causes the difference to be within the allowable range. In addition, the output voltage of the charge / discharge circuit 201 is adjusted. For example, when the voltage value set in the CV test mode is 5 V, the voltage value measured by the voltmeter 205 is 4.9 V, and the allowable range is ± 0.05 V, the F / B circuit 207 is connected to the charge / discharge circuit 201. Adjust the output voltage to be higher. On the contrary, when the voltage value set in the CV test mode is 5 V, the voltage value measured by the voltmeter 205 is 5.1 V, and the allowable range is ± 0.05 V, the F / B circuit 207 includes the charge / discharge circuit 201. Is adjusted so that the voltage value output by becomes lower.

  In this way, the charge / discharge test system 100 according to the present embodiment calibrates the constant voltage setting accuracy of the charge / discharge test apparatus 101 using the CV calibration magazine 102e shown in FIG. Thereby, in the CV test mode, the accuracy of the voltage value of the charge / discharge voltage applied to the secondary battery 150 when the secondary battery 150 is connected to the charge / discharge test apparatus 101 can be maintained.

  On the other hand, in the CV calibration magazine 102f shown in FIG. 6B, a termination resistor 302 is connected between the positive electrode tab 120a and the negative electrode tab 121a. Here, in the CV calibration magazine 102f, the positive electrode tab 120b is connected to the portion as close as possible to the termination resistor 302 by the wiring 140, separately from the wiring between the positive electrode tab 120a and the termination resistor 302. Thereby, it is possible to avoid the influence of the voltage drop due to the current flowing in the wiring between the positive electrode tab 120a and the termination resistor 302. Similarly, the negative electrode tab 121 b is connected to a portion as close as possible to the termination resistor 302 by a wiring 141, separately from the wiring between the negative electrode tab 121 a and the termination resistor 302. As a result, it is possible to avoid the influence of a voltage drop due to a current flowing in the wiring between the negative electrode tab 121a and the termination resistor 302. Note that, as described with reference to FIG. 6A, since the current hardly flows through the termination resistor 302, the CV calibration magazine 102f in FIG. 6B and the CV calibration magazine 102f in FIG. There is almost no difference in accuracy. Therefore, either the CV calibration magazine 102e or the CV calibration magazine 102f may be used.

In this way, the charge / discharge test system 100 according to the present embodiment calibrates the constant voltage setting accuracy of the charge / discharge test apparatus 101 using the CV calibration magazine 102f shown in FIG. 6B. Thereby, in the CV test mode, the accuracy of the voltage value of the charge / discharge voltage applied to the secondary battery 150 when the secondary battery 150 is connected to the charge / discharge test apparatus 101 can be maintained.
(Constant current setting accuracy calibration)
FIG. 7 shows an example of the calibration unit 102 with constant current setting accuracy. Here, the calibration unit 102 having the constant current setting accuracy is referred to as a CC (Constant Current) calibration magazine 102g or a CC calibration magazine 102h. The CC calibration magazine 102g shown in FIG. 7A corresponds to the common tab calibration unit 102a shown in FIG. 1 and includes a positive electrode tab 120 and a negative electrode tab 121. Further, the CC calibration magazine 102h shown in FIG. 7B corresponds to the independent tab calibration unit 102b shown in FIG. 2, and includes a positive electrode tab 120a, a negative electrode tab 121a, a positive electrode tab 120b, and a negative electrode tab 121b.

  The CC calibration magazine 102g and the CC calibration magazine 102h are used to calibrate the current value flowing through the secondary battery 150 in the constant current test mode (CC test mode) of the charge / discharge test apparatus 101. For example, in FIG. 7A, when the CC calibration magazine 102g is connected to the charge / discharge test apparatus 101, the charge / discharge test apparatus 101 reads the individual identification information of the RFID tag 191 of the CC calibration magazine 102g by the RFID reader 192. To the PC 103. The personal computer 103 recognizes that the CC calibration magazine 102g is connected based on the individual identification information received from the charge / discharge test apparatus 101, and controls the charge / discharge test apparatus 101 to calibrate the constant current setting accuracy. To instruct. Here, the control circuit 206 may recognize the connection of the CC calibration magazine 102g and calibrate the constant current measurement accuracy without notifying the personal computer 103 from the charge / discharge test apparatus 101.

  In FIG. 7A, the CC calibration magazine 102 g has a shunt resistor 303 connected between the positive electrode tab 120 and the negative electrode tab 121. Similar to the shunt resistor 202, the shunt resistor 303 is a resistor (for example, a low resistance of about 10 mΩ) for measuring the charge / discharge current flowing from the positive electrode tab 120 to the negative electrode tab 121. The voltage value at both ends of the shunt resistor 303 is output as a voltage value between the positive electrode tab 120 and the negative electrode tab 121. The positive electrode tab 120 is connected to the positive electrode monitor terminal 112 of the charge / discharge test apparatus 101 by the wiring 131a, and the negative electrode tab 121 is connected to the negative electrode monitor terminal 113 of the charge / discharge test apparatus 101 by the wiring 131b. Thereby, the voltmeter 205 can measure the voltage value at both ends of the shunt resistor 303 as the voltage value between the positive monitor terminal 112 and the negative monitor terminal 113.

  In FIG. 7A, when the calibration test in the CC test mode is started, the control circuit 206 sets the charge / discharge circuit 201 to the CC test mode. In response to this, the charge / discharge circuit 201 outputs a preset constant current (for example, 30 A). The current output from the charge / discharge circuit 201 is output from the positive electrode charge / discharge terminal 110 via the shunt resistor 202. The positive electrode charging / discharging terminal 110 is connected to the positive electrode tab 120 of the CC calibration magazine 102g by the wiring 130a, and the negative electrode charging / discharging terminal 111 is connected to the negative electrode tab 121 of the CC calibration magazine 102g by the wiring 130b. Thereby, the current output from the positive electrode charging / discharging terminal 110 is input to the positive electrode tab 120 of the CC calibration magazine 102 g and flows from the negative electrode tab 121 to the negative electrode charging / discharging terminal 111 through the shunt resistor 303. Then, the current value of the current flowing through the shunt resistor 303 is converted into a voltage value at both ends of the shunt resistor 303. A voltage value generated at both ends of the shunt resistor 303 is output as a voltage value between the positive electrode tab 120 and the negative electrode tab 121.

  Here, if the voltage drop due to the wiring inside the CC calibration magazine 102 g is ignored, the voltage value of the voltage generated at both ends of the shunt resistor 303 is equal to the voltage value between the positive electrode tab 120 and the negative electrode tab 121. The internal wiring of the CC calibration magazine 102g is a wiring from the positive electrode tab 120 to the shunt resistor 303 and a wiring from the shunt resistor 303 to the negative electrode tab 121. The voltage value output between the positive electrode tab 120 and the negative electrode tab 121 is measured by the voltmeter 205 as the voltage value between the positive electrode monitor terminal 112 and the negative electrode monitor terminal 113 connected by the wiring 131. .

  The control circuit 206 instructs the F / B circuit 207 to calibrate the constant current setting accuracy in the CC test mode. When the difference between the current value obtained by converting the voltage value read from the voltmeter 205 and the constant current value set in the CC test mode is not within a predetermined allowable range, the F / B circuit 207 determines that the difference is within the allowable range. The output current of the charge / discharge circuit 201 is adjusted so as to be within the range. For example, when the current value set in the CC test mode is 30 A, the current value read and converted from the voltmeter 205 is 28 A, and the allowable range is ± 0.05 A, the F / B circuit 207 has the charge / discharge circuit 201 The charge / discharge circuit 201 is adjusted so that the output current value becomes large. Conversely, when the current value set in the CC test mode is 30 A, the current value read and converted from the voltmeter 205 is 32 A, and the allowable range is ± 0.05 A, the F / B circuit 207 includes the charge / discharge circuit 201. The charge / discharge circuit 201 is adjusted so that the current value output from the battery becomes small.

  In this way, the constant current setting accuracy of the charge / discharge test apparatus 101 is calibrated using the CC calibration magazine 102g shown in FIG. Thereby, in CC test mode, when the secondary battery 150 is connected to the charge / discharge test apparatus 101, the accuracy of the current value of the charge / discharge current flowing through the secondary battery 150 can be maintained.

  Here, as the charge / discharge current flowing from the positive electrode tab 120 to the shunt resistor 303 increases, the voltage drop in the wiring between the positive electrode tab 120 and the shunt resistor 303 increases. Similarly, as the charge / discharge current flowing from the shunt resistor 303 to the negative electrode tab 121 increases, the voltage drop in the wiring between the shunt resistor 303 and the negative electrode tab 121 increases. Thereby, as the charging / discharging current increases, the difference between the voltage value at both ends of the shunt resistor 303 and the voltage value between the positive electrode tab 120 and the negative electrode tab 121 increases. For this reason, the voltmeter 205 has a problem that it is difficult to accurately measure the current value of the current flowing through the shunt resistor 303.

  On the other hand, in the CC calibration magazine 102h shown in FIG. 7B, a shunt resistor 303 is connected between the positive electrode tab 120a and the negative electrode tab 121a. In the CV calibration magazine 102f, the positive electrode tab 120b is connected to a portion as close as possible to the shunt resistor 303 by a wiring 140 different from the wiring between the positive electrode tab 120a and the shunt resistor 303. Thereby, the voltage value output between the positive electrode tab 120b and the negative electrode tab 121b can be prevented from being affected by the voltage drop due to the current flowing in the wiring between the positive electrode tab 120a and the shunt resistor 303. . Similarly, the negative electrode tab 121b is connected to a portion as close as possible to the shunt resistor 303 by a wire 141 different from the wire between the negative electrode tab 121a and the shunt resistor 303. Thereby, the voltage value output between the positive electrode tab 120b and the negative electrode tab 121b can be prevented from being affected by the voltage drop due to the current flowing in the wiring between the negative electrode tab 121a and the shunt resistor 303. . Therefore, the CC calibration magazine 102h can perform calibration with higher accuracy than the CC calibration magazine 102g. The constant current setting accuracy calibration method in the CC calibration magazine 102h shown in FIG. 7B is executed in the same manner as the CC calibration magazine 102g shown in FIG. 7A.

In this way, the constant current setting accuracy of the charge / discharge test apparatus 101 is calibrated using the CC calibration magazine 102h shown in FIG. Thereby, in CC test mode, when the secondary battery 150 is connected to the charge / discharge test apparatus 101, the accuracy of the current value of the charge / discharge current applied to the secondary battery 150 can be maintained.
(Constant current measurement accuracy calibration)
Next, calibration of constant current measurement accuracy will be described. Here, as the calibration unit 102 with constant current measurement accuracy, the same calibration unit 102 (CC calibration magazine 102g or CC calibration magazine 102h) as the constant current setting accuracy described with reference to FIG. 7 is used.

  In the calibration of the constant current measurement accuracy, the CC calibration magazine 102g or the CC calibration magazine 102h is used to calibrate the measurement accuracy of the current value obtained by converting the voltage value read from the voltmeter 203. Since the CC calibration magazine 102g or the CC calibration magazine 102h is also used for the calibration of the constant current setting accuracy described above, the calibration of the constant current measurement accuracy is performed continuously after the calibration of the constant current setting accuracy. This is efficient. For example, in FIG. 7A, when the CC calibration magazine 102g is connected to the charge / discharge test apparatus 101, the charge / discharge test apparatus 101 reads the individual identification information of the RFID tag 191 of the CV calibration magazine 102e by the RFID reader 192. To the PC 103. The personal computer 103 recognizes that the CC calibration magazine 102g is connected based on the individual identification information received from the charge / discharge test apparatus 101, and controls the charge / discharge test apparatus 101 to calibrate the constant current setting accuracy. To instruct. Then, the personal computer 103 instructs the control circuit 206 to calibrate the constant current measurement accuracy after the calibration of the constant current setting accuracy is completed. Here, without notifying the personal computer 103 from the charge / discharge test apparatus 101, the control circuit 206 recognizes the connection of the CC calibration magazine 102g and calibrates the constant current setting accuracy and the constant voltage measurement accuracy. Also good.

  The control circuit 206 instructs the F / B circuit 207 to calibrate the constant current measurement accuracy in the CC test mode. Thereby, the charging / discharging circuit 201 outputs a preset constant current (for example, 30 A). The current output from the charge / discharge circuit 201 is output from the positive electrode charge / discharge terminal 110 to the positive electrode tab 120 of the CC calibration magazine 102g via the shunt resistor 202, and from the negative electrode tab 121 to the negative electrode charge / discharge terminal 111 of the charge / discharge test apparatus 101. Flowing. Here, the voltmeter 203 converts the current value of the charge / discharge current flowing through the shunt resistor 202 into a voltage value at both ends of the shunt resistor 202 and outputs the voltage value to the F / B circuit 207.

  When the difference between the current value obtained by converting the voltage value read from the voltmeter 203 and the constant current value set in the CC test mode is not within the predetermined allowable range, the F / B circuit 207 determines that the difference is within the allowable range. The output current of the charge / discharge circuit 201 is adjusted so as to be within the range. For example, when the current value set in the CC test mode is 30 A, the current value read and converted from the voltmeter 203 is 28 A, and the allowable range is ± 0.05 A, the F / B circuit 207 is connected to the charge / discharge circuit 201. Adjust the output current value to be large. On the other hand, when the current value set in the CC test mode is 30 A, the current value read and converted from the voltmeter 203 is 32 A, and the allowable range is ± 0.05 A, the F / B circuit 207 includes the charge / discharge circuit 201. Is adjusted so that the output current value becomes smaller.

  In this way, calibration of the constant current measurement accuracy of the charge / discharge test apparatus 101 was performed using the CC calibration magazine 102g shown in FIG. 7A, and the secondary battery 150 was connected to the charge / discharge test apparatus 101. Sometimes the accuracy of the current value read from the voltmeter 203 can be maintained.

  On the other hand, the CC calibration magazine 102h shown in FIG. 7B determines whether or not the current value flowing through the shunt resistor 303 is a set current value as in the calibration of the constant current setting accuracy described above. Used for calibration. The calibration test for the constant current measurement accuracy is a test for calibrating the accuracy of the current value of the current flowing through the shunt resistor 202 read by the voltmeter 203 of the charge / discharge test apparatus 101. Therefore, the calibration unit 102 may use either the CC calibration magazine 102g or the CC calibration magazine 102h.

Similarly to the calibration of the constant voltage measurement accuracy described in FIG. 5, the calibration of the constant current measurement accuracy also includes a large current measurement accuracy and a small current measurement accuracy according to the setting of the current value flowing through the shunt resistor 202. Calibration may be performed separately.
(Calibration procedure for constant voltage measurement accuracy)
FIG. 8 shows an example of a calibration procedure for the constant voltage measurement accuracy. The calibration of the constant voltage measurement accuracy uses the VM calibration magazine 102c or the VM calibration magazine 102d described with reference to FIG.

  In step S101, the VM calibration magazine 102c or the VM calibration magazine 102d is connected to the charge / discharge test apparatus 101. Here, the VM calibration magazine 102c or the VM calibration magazine 102d has a reference battery 301 for low voltage. Then, the control circuit 206 reads the individual identification information of the RFID tag 191 of the VM calibration magazine 102c or the VM calibration magazine 102d by the RFID reader 192, and recognizes that the calibration unit 102 is connected. The control circuit 206 holds a table indicating correspondence between the individual identification information and the type of the calibration unit 102, and the calibration unit 102 connected to the charge / discharge test apparatus 101 is the VM calibration magazine 102c or the VM calibration magazine 102d. Determine that. Alternatively, the personal computer 103 may hold the table information so that the table indicating the correspondence between the individual identification information and the type of the calibration unit 102 can be easily maintained. In this case, the control circuit 206 notifies the personal identification information read by the RFID reader 192 to the personal computer 103 so as to acquire the type of the calibration unit 102 connected from the personal computer 103 and information on the secondary battery 150. Good. In any case, the control circuit 206 starts a calibration process according to the type of the calibration unit 102 connected to the charge / discharge test apparatus 101 and controls the charge / discharge circuit 201 and the F / B circuit 207. Here, the VM calibration magazine 102c or the VM calibration magazine 102d that flows on the test line together with the secondary battery 150 may be automatically connected to the charge / discharge test apparatus 101, or a maintenance worker may charge the VM calibration magazine. You may connect with the discharge test apparatus 101. FIG.

  In step S <b> 102, the F / B circuit 207 reads a voltage value from the voltmeter 205 under the control of the control circuit 206.

  In step S <b> 103, the F / B circuit 207 calculates a voltage difference between the voltage value read from the voltmeter 205 and the voltage value of the reference battery 301. The voltage value of the reference battery 301 is stored in advance in the control circuit 206 in association with the individual identification number of the calibration unit 102. Then, the control circuit 206 determines the voltage value of the reference battery 301 based on the individual identification number of the calibration unit 102 read by the RFID reader 192 and notifies the F / B circuit 207 of the voltage value. Alternatively, the voltage value information of the reference battery 301 may be stored in the RFID tag 191 in advance, and the control circuit 206 may read the voltage value information of the reference battery 301 from the RFID reader 192.

  In step S104, the F / B circuit 207 determines whether or not the voltage difference calculated in step S103 is within a preset allowable range. If the voltage difference is within the preset allowable range (Yes), the process proceeds to step S106. If the voltage difference is outside the allowable range (No), the process proceeds to step S105.

  In step S <b> 105, the F / B circuit 207 sets the voltage value read from the voltmeter 205 to be treated as a voltage value of the voltmeter 205 by correcting the voltage value calculated in step S <b> 103. Thereby, the calibration of the measurement accuracy of the voltmeter 205 at the time of a low voltage is completed.

  In step S106, as in step S101, the VM calibration magazine 102c or the VM calibration magazine 102d having the high-voltage reference battery 301 is connected to the charge / discharge test apparatus 101. Then, the control circuit 206 recognizes that it has the high-voltage reference battery 301 from the individual identification information of the RFID tag 191 of the VM calibration magazine 102c or the VM calibration magazine 102d read by the RFID reader 192, and starts the calibration process. To do.

  In step S107, as in step S102, the F / B circuit 207 reads the voltage value from the voltmeter 205 under the control of the control circuit 206.

  In step S108, as in step S103, the F / B circuit 207 calculates the voltage difference between the voltage value read from the voltmeter 205 and the voltage value of the reference battery 301.

  In step S109, as in step S104, the F / B circuit 207 determines whether or not the voltage difference calculated in step S107 is within a preset allowable range. If the voltage difference is within the preset allowable range (Yes), the process ends. If the voltage difference is outside the allowable range (No), the process proceeds to step S110.

  In step S110, as in step S105, the F / B circuit 207 sets the voltage value read from the voltmeter 205 to be treated as the voltage value of the voltmeter 205, corrected by the voltage difference calculated in step S108. . Thereby, the calibration of the measurement accuracy of the voltmeter 205 at the time of high voltage is completed.

Thus, the charge / discharge test system 100 according to the present embodiment can calibrate the constant voltage measurement accuracy of the charge / discharge test apparatus 101 by the VM calibration magazine 102c and the VM calibration magazine 102d of the calibration unit 102.
(Constant calibration procedure for constant voltage setting accuracy)
FIG. 9 shows an example of a calibration procedure for the constant voltage setting accuracy. The calibration of the constant voltage measurement accuracy uses the CV calibration magazine 102e or the CV calibration magazine 102f described with reference to FIG.

  In step S201, the CV calibration magazine 102e or the CV calibration magazine 102f is connected to the charge / discharge test apparatus 101. Then, the control circuit 206 reads the individual identification information of the RFID tag 191 of the CV calibration magazine 102e or the CV calibration magazine 102f by the RFID reader 192, and recognizes that the calibration unit 102 is connected. The control circuit 206 holds a table indicating correspondence between the individual identification information and the type of the calibration unit 102, and the calibration unit 102 connected to the charge / discharge test apparatus 101 is the CV calibration magazine 102e or the CV calibration magazine 102f. Determine that. Alternatively, the personal computer 103 may hold the table information so that the table indicating the correspondence between the individual identification information and the type of the calibration unit 102 can be easily maintained. In this case, the control circuit 206 notifies the personal identification information read by the RFID reader 192 to the personal computer 103 so as to acquire the type of the calibration unit 102 connected from the personal computer 103 and information on the secondary battery 150. Good. In any case, the control circuit 206 starts a calibration process according to the type of the calibration unit 102 connected to the charge / discharge test apparatus 101 and controls the charge / discharge circuit 201 and the F / B circuit 207. Here, the CV calibration magazine 102e or the CV calibration magazine 102f that flows on the test line together with the secondary battery 150 may be automatically connected to the charge / discharge test apparatus 101, or a maintenance worker may charge the CV calibration magazine. You may connect with the discharge test apparatus 101. FIG.

  In step S202, the F / B circuit 207 sets the charge / discharge circuit 201 to output a constant voltage determined in advance in the CV test mode under the control of the control circuit 206. The control circuit 206 may set the charge / discharge circuit 201 to the CV test mode.

  In step S <b> 203, the F / B circuit 207 reads the voltage value from the voltmeter 205.

  In step S204, the F / B circuit 207 calculates a voltage difference between the voltage value read from the voltmeter 205 and the voltage value of the constant voltage output setting.

  In step S205, the F / B circuit 207 determines whether or not the voltage difference calculated in step S204 is within a preset allowable range. If the voltage difference is within the preset allowable range (Yes), the process ends. If the voltage difference is outside the allowable range (No), the process proceeds to step S206.

  In step S206, the F / B circuit 207 calibrates the output voltage of the charge / discharge circuit 201 by the voltage difference calculated in step S204.

In this way, the charge / discharge test system 100 according to the present embodiment can calibrate the constant voltage setting accuracy of the charge / discharge test apparatus 101 by the CV calibration magazine 102e or the CV calibration magazine 102f of the calibration unit 102.
(Calibration procedure for constant current measurement accuracy and constant current setting accuracy)
FIG. 10 shows an example of a calibration procedure for constant current measurement accuracy and constant current setting accuracy. For the calibration of the constant current measurement accuracy and the constant current setting accuracy, the CC calibration magazine 102g or the CC calibration magazine 102h described with reference to FIG. 7 is used. In the flowchart of FIG. 10, the processing from step S301 to step S307 indicates the procedure of the calibration process of the constant current measurement accuracy. Further, the processing from step S308 to step S312 indicates a procedure of calibration processing for constant current setting accuracy.

  In step S301, the CC calibration magazine 102g or the CC calibration magazine 102h is connected to the charge / discharge test apparatus 101. Here, as in step S101, the control circuit 206 starts the calibration process in the CC test mode based on the individual identification information of the RFID tag 191 of the CC calibration magazine 102g or the CC calibration magazine 102h read by the RFID reader 192. Note that the CC calibration magazine 102g or the CC calibration magazine 102h that flows on the test line together with the secondary battery 150 may be automatically connected to the charge / discharge test apparatus 101, or the maintenance operator may charge / discharge the CC calibration magazine. You may connect with the test apparatus 101. FIG.

  In step S302, the F / B circuit 207 sets the charge / discharge circuit 201 to output a constant current predetermined in the CC test mode under the control of the control circuit 206. Note that the control circuit 206 may set the charge / discharge circuit 201 to the CC test mode.

  In step S303, the F / B circuit 207 converts the voltage value read from the voltmeter 203 into a current value.

  In step S304, the F / B circuit 207 converts the voltage value read from the voltmeter 205 into a current value.

  In step S <b> 305, the F / B circuit 207 calculates a current difference between the current value read from the voltmeter 203 and the current value read from the voltmeter 205.

  In step S306, the F / B circuit 207 determines whether or not the current difference calculated in step S304 is within a preset allowable range. If the current difference is within the preset allowable range (Yes), the process proceeds to step S308. If the current difference is outside the allowable range (No), the process proceeds to step S307.

  In step S307, the F / B circuit 207 sets so that the current value converted from the voltage value read from the voltmeter 203 is replaced with the current value corrected by the current difference calculated in step S305.

  In step S308, as in step S302, the F / B circuit 207 sets the charge / discharge circuit 201 to output a constant current predetermined in the CC test mode under the control of the control circuit 206. Note that the control circuit 206 may set the charge / discharge circuit 201 to the CC test mode. If the setting in step S302 is not changed, the F / B circuit 207 does not have to perform the process in this step.

  In step S309, as in step S304, the F / B circuit 207 converts the voltage value read from the voltmeter 205 into a current value. Note that if the current value read from the voltmeter 205 is stored in step S304, the F / B circuit 207 does not have to perform the process of this step.

  In step S <b> 310, the F / B circuit 207 calculates a current difference between a current value obtained by converting the voltage value read from the voltmeter 205 and a constant current output setting current value.

  In step S311, the F / B circuit 207 determines whether or not the current difference calculated in step S310 is within a preset allowable range. If the current difference is within the preset allowable range (Yes), the process ends. If the current difference is outside the allowable range (No), the process proceeds to step S312.

  In step S312, the F / B circuit 207 calibrates the output current of the charge / discharge circuit 201 by the current difference calculated in step S310.

  Thus, the charge / discharge test system 100 according to the present embodiment can calibrate the constant current setting accuracy of the charge / discharge test apparatus 101 by the CC calibration magazine 102g or the CC calibration magazine 102h of the calibration unit 102.

  As described above, the charge / discharge test system 100 according to the present embodiment can calibrate the calibration unit 102 having the same or similar terminal as the secondary battery 150 through 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 according to the present embodiment has a constant voltage measurement accuracy calibration, a constant voltage setting accuracy calibration, and a constant current measurement accuracy. Calibration and calibration of constant current setting accuracy can be performed. In addition, the calibration unit 102 according to the present embodiment can calibrate the charge / discharge test apparatus 101 with simple passive components without mounting components such as a measurement circuit, a communication path, or a battery.

  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 ... Charge-discharge test apparatus; 102, 102a, 102b ... Calibration unit; 102c, 102d ... VM calibration magazine; 102e, 102f ... CV calibration magazine; , 102h, CC calibration magazine; 103, personal computer; 110, positive charge / discharge terminal; 111, negative charge / discharge terminal; 112, positive monitor terminal; 120a, 120b ... positive electrode tab; 121, 121a, 121b ... negative electrode tab; 130, 130a, 130b, 131, 131a, 131b, 140, 141 ... wiring; 150 ... secondary battery; ... RFID tag; 192 ... RFID reader; 201 ... charge / discharge circuit; 202 ... shunt resistor; 04, 205 ... Voltmeter; 206 ... Control circuit; 207 ... F / B circuit; 300 ... Passive circuit; 301 ... Reference battery; 302 ... Termination resistor; 801... Personal computer; 802 .. wireless master; 900... Charge / discharge test system; 901... Charge / discharge test apparatus; ... F / B circuit; 920 ... Positive electrode tab; 921 ... Negative electrode tab; 951 ... Measurement circuit; 952 ... Control circuit; 953 ... Wireless slave unit;

Claims (7)

In order to calibrate the charge / discharge test apparatus, which includes positive / negative charge / discharge terminals, and performs a charge / discharge test by connecting the positive / negative charge / discharge terminals to positive / negative power terminals of a secondary battery, respectively.
In a charge / discharge test system having a calibration unit that is alternatively connected to the secondary battery with respect to the charge / discharge test apparatus,
The calibration unit is disposed at a position corresponding to the positive and negative power supply terminals of the secondary battery, and can be connected to the positive and negative charge / discharge terminals, respectively, and the positive test terminal and the negative test terminal. And a passive circuit disposed between
The passive circuit is a reference battery that outputs a resistor or a reference voltage connected between the positive test terminal and the negative test terminal;
The charge / discharge test apparatus measures at least one of a constant voltage measurement accuracy, a constant voltage setting accuracy, a constant current measurement accuracy, and a constant current setting accuracy by measuring a voltage value of the passive circuit of the calibration unit. Charge / discharge test system. The charge / discharge test system according to claim 1,
The calibration unit further includes a second positive test terminal separate from the positive test terminal and a second negative test terminal separate from the negative test terminal;
The second positive test terminal is connected to the passive circuit by a wiring different from a wiring connected from the positive test terminal to the passive circuit,
The second negative test terminal is connected to the passive circuit by a wiring different from the wiring connected to the passive circuit from the negative test terminal,
The charge / discharge test apparatus performs calibration by measuring a voltage value between the second positive test terminal and the second negative test terminal. In the charge / discharge test system according to claim 1 or 2,
The calibration unit has a casing having the same shape as the secondary battery, and the positive and negative test terminals of the calibration unit are arranged at positions corresponding to the positive and negative power terminals of the secondary battery. A charge / discharge test system. In order to calibrate a charge / discharge test apparatus for performing a charge / discharge test by connecting a positive / negative charge / discharge terminal to the positive / negative power supply terminal of the secondary battery, respectively, the secondary battery is alternatively selected from the secondary battery. In the calibration unit connected to
Positive and negative test terminals that are arranged at positions corresponding to the positive and negative power supply terminals of the secondary battery and can be connected to the positive and negative charge and discharge terminals, respectively.
A second positive test terminal separate from the positive test terminal; a second negative test terminal separate from the negative test terminal;
A passive circuit disposed between the positive test terminal and the negative test terminal;
The second positive test terminal is connected to the passive circuit by a wiring different from a wiring connected from the positive test terminal to the passive circuit,
The second negative test terminal is connected to the passive circuit by a wiring different from the wiring connected to the passive circuit from the negative test terminal,
The calibration unit, wherein the passive circuit is a reference battery that outputs a resistor or a reference voltage connected between the positive test terminal and the negative test terminal. The calibration unit according to claim 4 ,
A calibration unit comprising a casing having the same shape as the secondary battery, and the positive and negative test terminals being arranged at positions corresponding to the positive and negative power supply terminals of the secondary battery. In order to calibrate the charge / discharge test apparatus, which includes positive / negative charge / discharge terminals, and performs a charge / discharge test by connecting the positive / negative charge / discharge terminals to positive / negative power terminals of a secondary battery, respectively.
A calibration method in a charge / discharge test system having a calibration unit that is alternatively connected to the secondary battery with respect to the charge / discharge test apparatus,
The calibration unit is disposed at a position corresponding to the positive and negative power supply terminals of the secondary battery, and can be connected to the positive and negative charge / discharge terminals, respectively, and the positive test terminal and the negative test terminal. And a passive circuit disposed between
The passive circuit is a reference battery that outputs a resistor or a reference voltage connected between the positive test terminal and the negative test terminal;
The charge / discharge test apparatus measures at least one of a constant voltage measurement accuracy, a constant voltage setting accuracy, a constant current measurement accuracy, and a constant current setting accuracy by measuring a voltage value of the passive circuit of the calibration unit. Calibration method. The calibration method according to claim 6 ,
The calibration unit further includes a second positive test terminal separate from the positive test terminal and a second negative test terminal separate from the negative test terminal;
The second positive test terminal is connected to the passive circuit by a wiring different from a wiring connected from the positive test terminal to the passive circuit,
The second negative test terminal is connected to the passive circuit by a wiring different from the wiring connected to the passive circuit from the negative test terminal,
The charge / discharge test apparatus performs calibration by measuring a voltage value between the second positive test terminal and the second negative test terminal.

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