JP5079603B2 - Electrolytic capacitor inspection method and electrolytic capacitor inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform accurate inspection by enabling chuck defect to be detected. <P>SOLUTION: In an inspection method for an electrolytic capacitor, a DC voltage V is applied from a power source portion 13 where a resistance 13b and a DC power source 13c are connected in series to between anode and cathode terminals 3 and 4 of the electrolytic capacitor 1, and a voltage waveform A between a case 5 and an anode output terminal 13d, and a current waveform B of a current output from the DC power source 13c are measured from the beginning of application of the DC voltage V to compare the waveform A with a determination area C and a peak value of the waveform B with a determination value D. When the whole waveform A is included in the determination area C and the peak value is not less than the determination value D, it is determined that the anode terminal 3 and case 5 are in a non-short-circuit state, and when a part of the waveform A is not included in the determination area C and the peak value is not less than the determination value D, it is determined that the anode terminal 3 and case 5 are in a short-circuit state. Further, when a part of the waveform A is not included in the determination area C and the peak value is less than the determination value, it is determined that the anode output terminal 13d and anode terminal 3 are not connected or a cathode output terminal 13e and a cathode terminal 4 are not connected. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention is an electrolytic capacitor inspection method for inspecting the presence or absence of a short circuit between an anode terminal of an electrolytic capacitor formed by enclosing a capacitor element in which an anode terminal and a cathode terminal are erected in a metal case, and the case, And an electrolytic capacitor inspection apparatus.

  As this type of electrolytic capacitor inspection method, an electrolytic capacitor inspection method disclosed in Patent Document 1 below is known. In this method for inspecting an electrolytic capacitor, a short circuit between the case and the lead wire is inspected by applying a voltage between the case made of metal (for example, aluminum) and the lead wire. Although this patent document 1 does not describe a specific configuration of the inspection circuit, for example, as in the inspection circuit 101 shown in FIG. The chuck portion 11a that is in contact with the anode terminal 3, the chuck portion 11b that is in contact with the cathode terminal 4 of the electrolytic capacitor 1 and the chuck portion 11a and the anode 102a of the DC power source 102 are disconnected (connected) A switch 104 that is turned on / off) and a DC voltmeter 105 that measures the voltage between the pair of chuck portions 11a and 11b are generally used.

  In this inspection method using the inspection circuit 101, first, the anode terminal 3 and the cathode terminal 4 of the electrolytic capacitor 1 are chucked by the chuck portions 11 a and 11 b, and then the switch 104 is turned on and the DC power source 102 is used. The electrolytic capacitor 1 is shifted to a fully charged state. Subsequently, the switch 104 is shifted to the OFF state, and the holding voltage of the electrolytic capacitor 1 is measured by the DC voltmeter 105 after a predetermined time has elapsed since the completion of charging. In this case, if a short circuit does not occur between the anode terminal 3 of the electrolytic capacitor 1 and the case 5, the holding voltage is maintained above the threshold value, and a short circuit occurs between the anode terminal 3 and the case 5. Sometimes the holding voltage is below the threshold. Therefore, the presence or absence of a short circuit between the anode terminal 3 of the electrolytic capacitor 1 and the case 5 is inspected by comparing the holding voltage with the threshold value. As another inspection method, as shown in FIG. 11, the anode terminal 3 of the electrolytic capacitor 1 is chucked by the chuck portion 11a, and each probe of the DC resistance meter 111 is brought into contact with the anode terminal 3 and the case 5. A method of inspecting a short circuit state by measuring a resistance value between the anode terminal 3 and the case 5 by using a DC resistance meter 111 is also generally performed.

Japanese Patent No. 2542961 (page 1-2, Fig. 1)

  However, the following problems exist in the above-described electrolytic capacitor inspection method. That is, this electrolytic capacitor inspection method may be performed by an automatic inspection device in an inspection line. In this case, the electrolytic capacitor 1 is normally in an inverted state, that is, the anode terminal 3 and the cathode terminal, with the case 5 side accommodated in each recess of a transfer tray (not shown) having a plurality of recesses formed on the surface. In a state where 4 protrudes upward from the case 5, it is conveyed to the inspection position. Since the transfer tray is formed of a conductive material, the case 5 is in a state of being electrically connected to the transfer tray. Therefore, for example, in the automatic inspection apparatus including the inspection circuit 101 of FIG. 10, the contact of the cathode 102b of the DC power source 102 and the DC voltmeter 105 with respect to the case 5 is performed via the transfer tray. On the other hand, for the anode terminal 3 and the cathode terminal 4, the automatic inspection apparatus first moves the chuck portions 11 a and 11 b above the recess in which the electrolytic capacitor 1 to be inspected is accommodated, and then the anode terminal 3 and The chuck portions 11 a and 11 b are lowered to the cathode terminal 4. Subsequently, the chuck portions 11a and 11b are shifted to the chucked state, and the anode terminal 3 and the cathode terminal 4 are chucked.

  However, with respect to the electrolytic capacitor 1 in which the anode terminal 3 and the cathode terminal 4 are bent greatly, a state occurs in which the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is not normally performed. In this case, the electrolytic capacitor 1 is not normally inspected. In the above-described electrolytic capacitor inspection method, the inspection is performed based on a static physical quantity such as a holding voltage of the electrolytic capacitor 1 after a predetermined time has elapsed from the completion of charging and a resistance value between the anode terminal 3 and the case 5. Therefore, when the inspection result that the electrolytic capacitor 1 is defective is obtained, it is distinguished whether the electrolytic capacitor 1 is actually defective or whether the inspection result that the electrolytic capacitor 1 is defective due to a defective chuck is obtained. Have difficulty. Therefore, the above-described electrolytic capacitor inspection method has a problem that an accurate inspection cannot be performed because a chuck failure cannot be detected.

  The present invention has been made to solve such a problem, and it is a main object of the present invention to provide an electrolytic capacitor inspection method and an electrolytic capacitor inspection apparatus capable of detecting a chuck failure and performing an accurate inspection.

In order to achieve the above object, an electrolytic capacitor inspection method according to claim 1 is an electrolytic capacitor inspection method for inspecting for a short circuit between an anode terminal of the electrolytic capacitor and a case, the anode output terminal and the cathode output. A DC voltage from the DC power source is applied between the anode terminal and the cathode terminal of the electrolytic capacitor from a power source configured by connecting a resistor and a DC power source in series between the terminal, and the case and the The voltage waveform between the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply are measured from the start of application of the DC voltage, and the measured voltage waveform is defined in a predetermined determination area Comparing and comparing the peak value of the measured current waveform with a predetermined determination value, the entire voltage waveform is included in the determination area, and the peak value When the determination value is greater than or equal to the determination value, it is determined that the anode terminal and the case are in a non-short circuit state, at least a part of the voltage waveform is not included in the determination area, and the peak value is equal to or greater than the determination value. In this case, it is determined that the short-circuit state between the anode terminal and the case is short-circuited, at least a part of the voltage waveform is lower than the lower limit voltage value of the determination area, and the peak value is less than the determination value. at has a front Symbol cathode output terminal and the cathode terminal is determined to be in an unconnected state to be disconnected.

The electrolytic capacitor inspection method according to claim 2 is the electrolytic capacitor inspection method according to claim 1, wherein the measured voltage waveform is compared with the determination area, and the peak value and the determination value are compared. as a result of the comparison, at least a portion of the voltage waveform exceeds the upper limit voltage value of the determination area, and when the peak value is less than the determination value, non of the previous SL anode output terminal and said anode terminal is disconnected It is determined that the connection is established.

The method for inspecting an electrolytic capacitor according to claim 3 is a method for inspecting the presence or absence of a short circuit between the anode terminal of the electrolytic capacitor and the case, and is provided between the anode output terminal and the cathode output terminal. A DC voltage from the DC power source is applied between the anode terminal and the cathode terminal of the electrolytic capacitor from a power source unit configured by connecting a resistor and a DC power source in series to the case, and the case and the power source unit The voltage waveform between the anode output terminal and the current waveform of the current output from the DC power supply is measured from the start of application of the DC voltage, and the measured voltage waveform is compared with a predetermined determination area and The peak value of the measured current waveform is compared with a predetermined determination value, and the entire voltage waveform is included in the determination area, and the peak value is less than the determination value. In this case, it is determined that the anode terminal and the case are in a non-short circuit state, and at least a part of the voltage waveform is not included in the determination area and the peak value is equal to or greater than the determination value, It is determined that the short-circuit state between the anode terminal and the case is short-circuited, and at least a part of the voltage waveform exceeds the upper limit voltage value of the determination area and the peak value is less than the determination value, wherein the anode output terminal and the anode terminal is determined to be in an unconnected state to be disconnected.

  The method for inspecting an electrolytic capacitor according to claim 4 is the method for inspecting an electrolytic capacitor according to any one of claims 1 to 3, wherein when measuring the voltage waveform, the anode terminal and the cathode terminal; A pressure or vibration is applied between the case and the case.

The electrolytic capacitor inspection apparatus according to claim 5 is an electrolytic capacitor inspection apparatus that inspects whether there is a short circuit between the anode terminal of the electrolytic capacitor and the case, and chucks the anode terminal and the cathode terminal of the electrolytic capacitor. A resistor and a DC power source are connected in series between a pair of chuck portions and an anode output terminal and a cathode output terminal, and the anode output terminal is connected to one of the pair of chuck portions and the cathode output A power supply having a terminal connected to the other of the pair of chucks; and the case from the start of application of a DC voltage from the DC power supply of the power supply to the electrolytic capacitor chucked by the pair of chucks; The voltage waveform between the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply are measured in two channels. The processing compares the measured voltage waveform with a predetermined determination area, and compares the measured current waveform peak value with a predetermined determination value, so that the entire voltage waveform is determined. When it is included in the area and the peak value is greater than or equal to the determination value, it is determined that the anode terminal and the case are not short-circuited, and at least a part of the voltage waveform is not included in the determination area. When the peak value is equal to or greater than the determination value, it is determined that the anode terminal and the case are short-circuited, and at least a part of the voltage waveform falls below the lower limit voltage value of the determination area. and Bei a measuring instrument to which the peak value is at less than the judgment value, the previous SL cathode output terminal and the cathode terminal to execute the determination process to determine that a non-connected state to the unconnected To have.

The electrolytic capacitor inspection apparatus according to claim 6 is the electrolytic capacitor inspection apparatus according to claim 5, wherein the measuring device compares the measured voltage waveform with the determination area, and compares the peak value with the determination. results of the comparison between the value, at least a portion of the voltage waveform exceeds the upper limit voltage value of the determination area, and when the peak value is less than the determination value, before SL and the anode output terminal and the anode terminal is not connected It is determined that the connection is not established.

The electrolytic capacitor inspection apparatus according to claim 7 is an electrolytic capacitor inspection apparatus that inspects whether there is a short circuit between the anode terminal of the electrolytic capacitor and the case, and chucks the anode terminal and the cathode terminal of the electrolytic capacitor. A resistor and a DC power source are connected in series between a pair of chuck portions and an anode output terminal and a cathode output terminal, and the anode output terminal is connected to one of the pair of chuck portions and the cathode output A power supply having a terminal connected to the other of the pair of chucks; and the case from the start of application of a DC voltage from the DC power supply of the power supply to the electrolytic capacitor chucked by the pair of chucks; The voltage waveform between the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply are measured in two channels. The processing compares the measured voltage waveform with a predetermined determination area, and compares the measured current waveform peak value with a predetermined determination value, so that the entire voltage waveform is determined. When it is included in the area and the peak value is greater than or equal to the determination value, it is determined that the anode terminal and the case are not short-circuited, and at least a part of the voltage waveform is not included in the determination area. When the peak value is equal to or greater than the determination value, it is determined that the anode terminal and the case are short-circuited, and at least a part of the voltage waveform exceeds the upper limit voltage value of the determination area. and Bei a measuring instrument to which the peak value is at less than the determination value, the anode output terminal and the anode terminal performs a determination process to determine that a non-connected state to the unconnected To have.

  The electrolytic capacitor inspection apparatus according to claim 8 is the electrolytic capacitor inspection apparatus according to any one of claims 5 to 7, wherein the anode terminal, the cathode terminal, and the case are measured when the voltage waveform is measured. A vibration application unit for applying pressure or vibration is provided.

6. The electrolytic capacitor inspection method according to claim 1, and the electrolytic capacitor inspection apparatus according to claim 5, wherein the electrolytic capacitor is connected to the anode output terminal and the cathode output terminal by connecting a resistor and a DC power source in series. DC voltage is applied between the anode terminal and the cathode terminal, and the voltage waveform between the case and the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply are measured from the start of DC voltage application. When the measured voltage waveform is compared with the determination area and the peak value of the current waveform is compared with the determination value, the entire voltage waveform is included in the determination area and the peak value is equal to or greater than the determination value. It is determined that the terminal and the case are not short-circuited. Further, when at least a part of the voltage waveform is not included in the determination area and the peak value is equal to or greater than the determination value, it is determined that the short-circuit state in which the anode terminal and the case are short-circuited. Further, at least a portion of the voltage waveform is below the lower limit voltage value of the determination area, and when the peak value is less than the determination value, and negative electrode output terminal and the cathode terminal is determined to be in an unconnected state to be disconnected .

Therefore, according to this electrolytic capacitor inspection method and electrolytic capacitor inspection apparatus, the quality of the electrolytic capacitor (whether or not the anode terminal and the case are in a short-circuited state) is detected, and the cathode output terminal of the power supply unit and the electrolytic capacitor are electrolyzed. it is possible to detect that the (chuck failure) and the cathode terminal of the capacitor is not connected state to the disconnected, it is possible to perform an accurate test for electrolytic capacitor.

According to the method for inspecting an electrolytic capacitor according to claim 2 and the apparatus for inspecting electrolytic capacitor according to claim 6, as a result of comparison between the measured voltage waveform and the judgment area, and comparison between the peak value and the judgment value, the voltage waveform at least partially around the upper upper limit voltage value of the determination area, and when the peak value is less than the determination value, the non-connected state in which the positive electrode output terminal of the power supply unit and the anode end terminal of the electrolytic capacitor is not connected to ( Therefore, it is possible to specifically identify the occurrence location of the chuck failure.

According to the method for inspecting an electrolytic capacitor according to claim 3 and the apparatus for inspecting electrolytic capacitor according to claim 7 , measurement is performed together with detection of the quality of the electrolytic capacitor (whether or not the anode terminal and the case are short-circuited). If at least part of the voltage waveform exceeds the upper limit voltage value of the judgment area and the peak value is less than the judgment value as a result of comparing the measured voltage waveform with the judgment area and comparing the peak value with the judgment value, Since it can be determined that the anode output terminal and the anode terminal of the part are in a non-connected state (chuck failure) where they are not connected, the location where the chuck failure occurs can be specifically identified.

  According to the method for inspecting an electrolytic capacitor according to claim 4 and the apparatus for inspecting electrolytic capacitor according to claim 8, since the capacitor element can be pressed against the case for inspection, the anode foil and the cathode foil are displaced from the electrolytic paper. As a result of being wound and manufactured, each foil (anode foil and cathode foil) in an electrolytic capacitor (electrolytic capacitor to be determined as defective) having an extremely small distance between the end of the electrolytic paper and the end of each foil ) Can be increased in contact with the case, whereby the electrolytic capacitor to be determined as defective can be more reliably determined as defective. In addition, since an aluminum oxide film is present on the inner surface of the case, depending on the electrolytic capacitor, at least one of the foil, the anode terminal, and the cathode terminal is in contact with the case due to manufacturing defects. Even so, the oxide film may be temporarily in an insulating state (high resistance state). Such an electrolytic capacitor (an electrolytic capacitor that should be identified as defective) is determined as a non-defective product when no pressure or vibration is applied, but the oxide film can be physically destroyed by applying pressure or vibration. Thus, it can be determined as a failure.

  The best mode of an electrolytic capacitor inspection method and an electrolytic capacitor inspection device according to the present invention will be described below with reference to the accompanying drawings.

  First, a schematic configuration of the electrolytic capacitor 1 to be inspected will be described with reference to FIG. The electrolytic capacitor 1 has an anode terminal 3 and a cathode terminal 4 connected to an anode foil and a cathode foil (both not shown) cut into predetermined dimensions, respectively, and the anode foil and the cathode foil are connected to an electrolytic paper (not shown). Capacitor element 2 produced by winding in a state of interposing metal, metal case 5 in which capacitor element 2 is accommodated, and a sealing material for sealing capacitor element 2 accommodated in case 5 (one example) As rubber) 6 and a resin film 7 that electrically insulates the peripheral wall of the case 5. Further, the electrolytic capacitor 1 is equivalently connected between the anode terminal 3 and the cathode terminal 4 in a state of being connected in series with the capacitance C and the capacitance C, as shown in FIG. Equivalent series resistance Rs (hereinafter also referred to simply as “resistance Rs”, the resistance value is as small as 0.1Ω or less), leakage resistance R1 existing between the anode terminal 3 and the case 5, and the cathode terminal 4 A leakage resistance R2 existing between the case 5 and the case 5 is provided. In this case, the resistance value of the leakage resistance R1 is very large compared to the resistance value of the leakage resistance R2, and is about several tens of MΩ for a good product.

  Next, the configuration of the electrolytic capacitor inspection apparatus 10 will be described with reference to the drawings.

  As shown in FIG. 1, the electrolytic capacitor inspection apparatus 10 includes a pair of chuck portions 11 a and 11 b, a moving mechanism 12, a power source portion 13, a measuring instrument 14, and a control portion 15. The intervals between the chuck portions 11a and 11b are made to correspond to the interval between the anode terminal 3 and the cathode terminal 4 (the interval between the erected anode terminal 3 and the cathode terminal 4). The chuck portion 11b is configured to be able to chuck the cathode terminals 4 respectively. Further, the chuck portions 11a and 11b operate based on the control signal S1 from the control portion 15, and shift to either the chuck state or the non-chuck state. The moving mechanism 12 operates based on the control signal S2 from the control unit 15 to move the chuck units 11a and 11b three-dimensionally above the inspection position with respect to the electrolytic capacitor 1. As an example, the electrolytic capacitor 1 has a case 5 accommodated in a plurality of recesses formed on the surface of a transfer tray formed of a conductive material in the same manner as in the past, and a plurality of electrolytic capacitors 1 are simultaneously placed in an inspection position in an inverted state. Be transported. The moving mechanism 12 moves the chuck portions 11a and 11b to the electrolytic capacitor 1 to be inspected accommodated in the recess by the control unit 15 based on the control signal S2 from the control unit 15.

  The power supply unit 13 includes a switch 13a, a resistor 13b, and a DC power supply 13c connected in series with each other, and these series circuits are connected between an anode output terminal 13d and a cathode output terminal 13e. In this case, the connection / disconnection state (on / off state) of the switch 13a is controlled by the control signal S3 from the control unit 15. The anode output terminal 13d is connected to the chuck portion 11a, and the cathode output terminal 13e is connected to the chuck portion 11b. Further, the resistance value of the resistor 13b is regulated to an appropriate value corresponding to the DC voltage V output from the DC power source 13c, so that an excessive current does not flow through the electrolytic capacitor 1.

  The measuring instrument 14 includes at least two channels (CH1, CH2). As an example, the voltage detection probe 14a is connected to the positive input terminal of the first channel (CH1) and the voltage detection probe 14b is connected to the negative input terminal. The voltage detection probe 14e is connected to the positive input terminal of the second channel (CH2), and the voltage detection probe 14f is connected to the negative input terminal. The measuring instrument 14 is configured to be able to execute measurement processing and discrimination processing. Further, the measuring instrument 14 displays a waveform A (voltage waveform) and a waveform B (current waveform) measured in the measurement process, a judgment area (area indicated by oblique lines) C stored in advance, and a judgment value D. Display part 14c and an indicator 14d for displaying the discrimination result in the discrimination process. Further, the measuring instrument 14 executes the above-described measurement processing and the like with the input of the control signal S4 from the control unit 15 as a trigger.

  In this case, in the determination area C, the anode terminals 3 and the cathode terminals 4 of the electrolytic capacitor 1 of a non-defective product (a state where the anode terminal 3 and the case 5 are not short-circuited) are normally chucked by the chuck portions 11a and 11b. In this state, when the switch 13a of the power supply unit 13 is turned on, the waveform A (voltage generated in the leakage resistance R1) measured on the first channel CH1 of the measuring instrument 14 via the voltage detection probes 14a and 14b. 1 is created based on the waveform (shown by a solid line in FIG. 1), and in consideration of the variation of the non-defective electrolytic capacitor 1, the area of the waveform A for the non-defective electrolytic capacitor 1 is included. The shape is specified. The determination value D is determined when the switch 13a of the power supply unit 13 is turned on in the state where the anode terminal 3 and the cathode terminal 4 of the good electrolytic capacitor 1 are normally chucked by the chuck units 11a and 11b. A waveform B (a waveform of a voltage generated between both ends of the resistor 13b and measured by the second channel CH2 of the measuring instrument 14 through the voltage detection probes 14e and 14f, and a current output from the DC power supply 13c. A waveform showing a waveform (created based on the peak value of the broken line in FIG. 1), and a current (current value is not limited, but, for example, a current of several mA or more) is output from the DC power supply 13c. It is defined as a value that can detect this. Further, the measuring instrument 14 outputs a completion signal S5 to the control unit 15 when the inspection of one electrolytic capacitor 1 is completed.

  The control unit 15 is configured by a CPU or the like, and detects completion of movement of the transport tray to the inspection position or completion of inspection of one electrolytic capacitor 1 to detect the chuck units 11a and 11b, the moving mechanism 12, and the power supply unit 13. Executes control for. Further, the control unit 15 outputs a control signal S4 to the measuring instrument 14 to start measurement processing and the like.

  Next, an electrolytic capacitor inspection method will be described together with the operation of the electrolytic capacitor inspection apparatus 10.

  In the electrolytic capacitor inspection apparatus 10, in the operating state, when the control unit 15 detects the completion of the movement of the new transport tray to the inspection position, the inspection process 50 for the electrolytic capacitor 1 is started (see FIG. 9). In this inspection process, the control unit 15 first outputs a control signal S2 to the moving mechanism 12, and first moves the chuck units 11a and 11b to the position of the electrolytic capacitor 1 to be inspected (step 51). Is completed, the control signal S1 is output to the chuck portions 11a and 11b to shift to the chuck state (step 52). In this case, when the electrolytic capacitor 1 is accommodated in the transfer tray in a normal state and the anode terminal 3 and the cathode terminal 4 of the electrolytic capacitor 1 are not bent (when the bending is within an allowable range). The anode terminal 3 and the cathode terminal 4 of the electrolytic capacitor 1 are chucked by the chuck portions 11a and 11b. On the other hand, when the bending occurring in the anode terminal 3 or the cathode terminal 4 exceeds the allowable range, even if the chuck portions 11a and 11b shift to the chucked state, the anode terminal 3 and the cathode terminal 4 are not in the chuck portions 11a and 11b. Is not chucked. When the chuck part 11a normally chucks the anode terminal 3, the anode output terminal 13d of the power supply part 13 is connected to the anode terminal 3, so that the voltage detection probe 14a in one channel of the measuring instrument 14 also outputs the anode. The anode terminal 3 is connected via the terminal 13d and the chuck portion 11a. When the chuck part 11 b normally chucks the cathode terminal 4, the cathode output terminal 13 e of the power supply part 13 is connected to the cathode terminal 4.

  Next, the control unit 15 outputs a control signal S4 to the measuring instrument 14. Thereby, the measuring instrument 14 performs the measurement process and the discrimination process in this order (step 53). The control unit 15 outputs the control signal S3 to the power supply unit 13 for a predetermined time in synchronization with the output of the control signal S4. As a result, in the power supply unit 13, the switch 13a is shifted (controlled) from the OFF state to the ON state for a predetermined time, and the DC voltage V of the DC power supply 13c is supplied to the anode terminal 3 of the electrolytic capacitor 1 via the resistor 13b and the switch 13a. And is applied between the cathode terminal 4 for a predetermined time.

  In the measurement process, the measuring instrument 14 generates a voltage generated between the case 5 of the electrolytic capacitor 1 and the chuck portion 11a (in this example, the anode terminal 3 of the electrolytic capacitor 1) in the first channel CH1 and the resistance 13b. The voltage generated between both ends is simultaneously measured for a predetermined time in the second channel CH2 and the waveforms A and B are stored. Thereby, the measurement process is completed. Next, the measuring instrument 14 displays the stored waveforms A and B and the determination area C stored in advance on the display unit 14c simultaneously (overlapping) as shown in FIG. Next, the measuring instrument 14 executes a discrimination process. In this determination processing, the measuring instrument 14 determines whether or not the entire waveform A is included in the determination area C and whether or not the peak value of the waveform B is equal to or greater than the determination value D. Thus, at least determination of whether or not the electrolytic capacitor 1 is good and determination of whether or not a chuck error (chuck failure) has occurred in the chuck of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b are executed. The measuring instrument 14 displays the discrimination result on the indicator 14d. Thereby, the discrimination process by the measuring instrument 14 is completed.

  This determination process will be described in detail. The electrolytic capacitor 1 is a non-defective product (that is, the anode terminal 3 and the case 5 are not short-circuited), and the anode terminal 3 by the chuck portions 11a and 11b. When the chucking of the cathode terminal 4 is normally performed, the current I is supplied to the electrolytic capacitor 1 from the DC power supply 13c of the power supply unit 13 through the path shown in the right diagram of FIG. For this reason, the electrolytic capacitor 1 is charged with its own capacitance C by the current I. At this time, the waveform A (that is, the voltage generated between the anode terminal 3 and the cathode terminal 4) measured by the first channel CH1 of the measuring instrument 14 via the voltage detection probes 14a and 14b is divided by the leakage resistors R1 and R2. The waveform of the voltage generated between both ends of the leakage resistance R1 (the waveform indicated by the solid line in the figure) is immediately after the start of voltage application by the power supply unit 13 (time t1). 13 has a waveform that rises with a time constant defined by the resistor 13b and the resistor Rs (substantially because the resistance Rs is extremely small as described above, and is substantially the time constant defined by the capacitance C and the resistor 13b). As shown in the left diagram of FIG. Further, since the current I is output from the DC power supply 13c and flows to the resistor 13b, the waveform B (the waveform indicated by the broken line in the figure) is generated in the second channel CH2 of the measuring instrument 14 via the voltage detection probes 14e and 14f. Measured, the peak value exceeds the judgment value D. Therefore, the measuring instrument 14 determines that the entire waveform A is included in the determination area C and the peak value of the waveform B is equal to or greater than the determination value D in the determination process, and the anode terminal 3 by the chuck portions 11a and 11b. Further, it is determined that the chucking of the cathode terminal 4 is normally performed and that the anode terminal 3 and the case 5 are not short-circuited, and the electrolytic capacitor 1 is determined to be a good product. Further, the measuring instrument 14 displays on the indicator 14d that the electrolytic capacitor 1 to be inspected is a non-defective product.

  Further, when the cathode terminal 4 of the electrolytic capacitor 1 and the case 5 are short-circuited, the resistance value of the leakage resistance R2 becomes substantially zero as shown in the right diagram in FIG. Therefore, in a state where the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is normally performed, the waveform A measured by the first channel CH1 of the measuring instrument 14 is the anode terminal 3 and the cathode terminal. 4 is applied to the entire leakage resistance R1, and therefore, as shown in the left diagram of FIG. 4, the waveform A of the electrolytic capacitor 1 in which the cathode terminal 4 and the case 5 are not short-circuited (in FIG. 3) It rises to a higher voltage than the left figure. However, since the resistance value of the leakage resistance R2 is originally small, many electrolytic capacitors 1 are included in the determination area C as shown in the left diagram of FIG. In addition, since the current I flows through a path including the resistor 13b as shown in the left diagram in the figure, the peak value of the waveform B measured in the second channel CH2 of the measuring instrument 14 is shown in the left diagram in the figure. As shown, it is greater than or equal to the determination value D. Since the electrolytic capacitor 1 in which the cathode terminal 4 and the case 5 are short-circuited in this way has no problem with the function as a capacitor, the measuring instrument 14 includes the entire waveform A in the determination area C in the determination process. Further, based on the fact that the peak value of the waveform B is equal to or greater than the determination value D, the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is normally performed, and the anode terminal 3 and the case 5 are It is determined that the space is not short-circuited, and the electrolytic capacitor 1 is determined to be a non-defective product. Moreover, the measuring instrument 14 displays that on the indicator 14d.

  Further, when the anode terminal 3 of the electrolytic capacitor 1 and the case 5 are short-circuited, the resistance value of the leakage resistance R1 becomes substantially zero as shown in the right diagram in FIG. Therefore, even when the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is performed normally, as shown in the left diagram of FIG. The waveform A to be applied remains at zero volts and does not change. Therefore, the waveform A is not included in the determination area C immediately after the voltage application start (time t1) by the power supply unit 13 and falls below the determination area C (in other words, the waveform A is the lower limit voltage of the determination area C). Voltage is lower than the value). On the other hand, since the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is normally performed, the current I is the same as that in the above-described embodiment shown in FIGS. Thus, the peak value of the waveform B measured on the second channel CH2 of the measuring instrument 14 also becomes the determination value D or more. In this case, the measuring instrument 14 is in a state in which the waveform A is not included in the determination area C in the mode shown in the left diagram of FIG. 5 (the mode lower than the lower limit voltage value of the determination area C) in the determination process, and Based on the fact that the peak value of the waveform B is equal to or greater than the determination value D, the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is normally performed, but the anode terminal 3 and the case 5 It is determined that the electrolytic capacitor 1 is a defective product. Moreover, the measuring instrument 14 displays that on the indicator 14d.

  Further, even if the electrolytic capacitor 1 is a non-defective product, as shown in the right diagram of FIG. 6, when a chuck failure (a state where the cathode terminal 4 is not chucked) occurs in the chuck portion 11b, the DC power supply 13c. Therefore, the current I is not output from the DC power supply 13c, and therefore the electrolytic capacitor 1 is not charged by the power supply unit 13. For this reason, the waveforms A and B measured on the channels CH1 and CH2 of the measuring instrument 14 do not change from zero volts as shown in the left diagram of FIG. That is, the waveform A is in a state below the lower limit voltage value of the determination area C, and the waveform B is less than the determination value D. In this case, the measuring instrument 14 is in a state in which the waveform A is not included in the determination area C in the aspect shown in the left diagram of FIG. 6 (the aspect below the lower limit voltage value of the determination area C) in the determination process, and Based on the fact that the peak value of the waveform B is less than the judgment value D, the chuck portion 11b is not normally chucking the cathode terminal 4 (the chuck portion 11b has a chuck failure with respect to the cathode terminal 4). And the fact is displayed on the indicator 14d.

  Further, even if the electrolytic capacitor 1 is a non-defective product, as shown in the right diagram in FIG. 7, when a chuck failure (a state in which the anode terminal 3 is not chucked) occurs in the chuck portion 11 a, the power source portion 13. The direct current power supply 13c does not supply the current I to the electrolytic capacitor 1 through the regular path (path shown in FIGS. 3 to 5), and the path shown in the right diagram in FIG. 7 (internal resistance of the measuring instrument 14). The current I is supplied via Ri (refer to FIGS. 2 and 7, a path including a high resistance value of about 1 MΩ). In this path, the internal resistance Ri having a high resistance value is included in series as described above, and the capacitance C is connected in series with the leakage resistance R1 having an extremely large resistance value, and the series circuit and the resistance value thereof. And a small leakage resistance R2 connected in parallel. Therefore, the waveform A measured by the first channel CH1 of the measuring instrument 14 is hardly affected by the presence of the capacitance C, and as shown in the left diagram of FIG. Immediately after the start of voltage application by the power source 13c (time t1), the voltage rapidly increases and exceeds the determination area C (a voltage higher than the upper limit voltage value of the determination area C), and then gradually decreases to the determination area C. The waveform is included. On the other hand, since the path through which the current I flows includes the internal resistor Ri having a high resistance value as described above, the current I has a very small current value (current value close to zero amperes). As a result, the waveform B measured on the second channel CH2 of the measuring instrument 14 is maintained at substantially zero volts. Therefore, the measuring instrument 14 is in a state where the waveform A is not included in the determination area C in the mode shown in the left diagram of FIG. 7 (mode in which the waveform A exceeds the upper limit voltage value of the determination area C immediately after voltage application) in the determination process. In addition, based on the fact that the peak value of the waveform B is less than the determination value D, it is determined that a chuck failure has occurred in the chuck portion 11a, and this is displayed on the indicator 14d. Note that the waveform A as shown in the left diagram of FIG. 7 indicates that the electrolytic capacitor 1 is in a wrong mounting state in which the electrolytic capacitor 1 is rotated 180 ° from the normal storage state and stored in the concave portion of the transport tray, that is, the cathode in the chuck portion 11a. It also occurs when a chuck failure occurs in the chuck portion 11a in a state where the terminal 4 is to be chucked (reverse mounting state).

  Further, even when the electrolytic capacitor 1 is a non-defective product and the chucking of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b is normally performed, for example, the electrolytic capacitor 1 is a transfer tray. As shown in the right figure in FIG. 8, the cathode terminal 4 is chucked by the chuck portion 11a and the anode terminal 3 is chucked by the chuck portion 11b due to being housed in the concave portion in the above-described erroneous mounting state. When the measuring instrument 14 is in a reverse state (reverse mounting state), the voltage detection probes 14a and 14b of the measuring instrument 14 are connected between both ends of the leakage resistance R2 whose resistance value is significantly smaller than that of the leakage resistance R1. . For this reason, the waveform A measured by the first channel CH1 of the measuring instrument 14 is extremely low although it gradually increases immediately after the start of voltage application (time t1) by the power supply unit 13 as shown in the left diagram of FIG. It rises only up to the voltage and falls below the lower limit voltage value of the determination area C. On the other hand, the waveform B measured on the second channel CH2 of the measuring instrument 14 has a peak value equal to or higher than the determination value D because the current I flows through the path shown in the right diagram of FIG. Therefore, the measuring instrument 14 is in a state in which the waveform A is not included in the determination area C in the mode shown in the left diagram of FIG. 8 (mode lower than the lower limit voltage value of the determination area C) in the determination process, and the waveform Based on the fact that the peak value of B is equal to or greater than the determination value D, the anode terminal 3 and the cathode terminal 4 of the electrolytic capacitor 1 are chucked in the reversely mounted state (reverse polarity) on the chuck portions 11a and 11b. After that, the fact is displayed on the indicator 14d.

  The measuring instrument 14 outputs a completion signal S5 to the control unit 15 when the measurement process and the discrimination process for one electrolytic capacitor 1 to be inspected are completed. When the completion signal S5 is input, the control unit 15 outputs the control signal S1 to the chuck units 11a and 11b to shift to the non-chuck state (step 54). Next, the control unit 15 determines whether or not an untested electrolytic capacitor 1 is present (step 55). If present, the control unit 15 proceeds to step 51 to determine the electrolytic capacitor 1 to be inspected next. The chuck portions 11a and 11b are moved to positions. The control unit 15 repeats the above steps 51 to 55 to continue the inspection of the electrolytic capacitor 1 accommodated in the transfer tray. On the other hand, when it is determined in step 55 that there is no untested electrolytic capacitor 1, the control unit 15 moves the chuck portions 11a and 11b to the retracted position (step 56). Thereby, the inspection process is completed. Accordingly, the operator observes the display of the indicator 14d of the measuring instrument 14 and the waveform A displayed on the display unit 14c, thereby judging the quality of the electrolytic capacitor 1 and the anode terminal 3 by the chuck units 11a and 11b. Also, it is possible to determine whether the cathode terminal 4 is in a chucked state.

  Thus, in this electrolytic capacitor inspection apparatus 10 and the electrolytic capacitor inspection method executed by this electrolytic capacitor inspection apparatus 10, the resistor 13b and the DC power supply 13c are connected in series between the anode output terminal 13d and the cathode output terminal 13e. A DC voltage V is applied between the anode terminal 3 and the cathode terminal 4 of the electrolytic capacitor 1 from the power supply unit 13 configured as described above, and a waveform A between the case 5 and the anode output terminal 13d of the power supply unit 13 and The waveform B of the current I output from the DC power supply 13c is measured from the start of application of the DC voltage V (time t1), the measured waveform A is compared with the determination area C, and the peak value of the waveform B is determined as the determination value D. In comparison, when the entire waveform A is included in the determination area C and the peak value is equal to or greater than the determination value D, the anode terminal 3 and the case 5 are in a non-shorted state ( Solution capacitor 1 determines a is) defective. Further, when at least a part of the waveform A is not included in the determination area C and the peak value is equal to or greater than the determination value D, it is determined that the short-circuited state between the anode terminal 3 and the case 5 is short-circuited. Further, when at least a part of the waveform A is not included in the determination area C and the peak value is less than the determination value D, the anode output terminal 13d and the anode terminal 3 are disconnected (the chuck portion 11a performs chucking). And the cathode output terminal 13e and the cathode terminal 4 are disconnected from each other (a state in which a chuck failure occurs in the chuck portion 11b). To do.

  Therefore, according to the electrolytic capacitor inspection apparatus 10 and the electrolytic capacitor inspection method, it is possible to detect the quality of the electrolytic capacitor 1 and the chuck failure of the anode terminal 3 and the cathode terminal 4 by the chuck portions 11a and 11b. An accurate inspection for the electrolytic capacitor 1 can be executed.

  Further, according to the electrolytic capacitor inspection apparatus 10 and the electrolytic capacitor inspection method, as a result of comparison between the waveform A and the determination area C and comparison between the peak value of the waveform B and the determination value D, at least a part of the waveform A is obtained. Is below the lower limit voltage value of the determination area C and the peak value is less than the determination value D, a chuck failure has occurred between the cathode output terminal 13e and the cathode terminal 4, that is, a chuck failure has occurred in the chuck portion 11b. Therefore, it is possible to specifically identify the occurrence location of the chuck failure.

  Further, according to the electrolytic capacitor inspection apparatus 10 and the electrolytic capacitor inspection method, as a result of comparison between the waveform A and the determination area C and comparison between the peak value of the waveform B and the determination value D, at least a part of the waveform A is obtained. Exceeds the upper limit voltage value of the determination area C and the peak value is less than the determination value D, a chuck failure has occurred between the anode output terminal 13d and the anode terminal 3, that is, a chuck failure has occurred in the chuck portion 11a. Therefore, it is possible to specifically identify the occurrence location of the chuck failure.

  In addition, this invention is not limited to said structure. For example, the measurement of the waveform B, which is the current waveform of the current I output from the DC power supply 13c, is performed by measuring the voltage across the resistor 13b using a pair of voltage detection probes 14e and 14f. Instead of using the pair of voltage detection probes 14e and 14f, a current detection probe (current probe) may be connected to the second channel CH2. In addition, when the DC voltage V is applied from the power supply unit 13 to the electrolytic capacitor 1 and the waveform A is measured by the measuring instrument 14, the control unit 15 outputs the control signal S 2 to the moving mechanism 12. On the other hand, it is also possible to perform control to further move the chuck portions 11a and 11b to the electrolytic capacitor 1 side. As a result, the capacitor element 2 receives pressure from the chuck portions 11 a and 11 b via the anode terminal 3 and the cathode terminal 4 and is pressed against the case 5. For this reason, as a result of the anode foil and the cathode foil being manufactured by being wound with respect to the electrolytic paper, the electrolytic capacitor 1 having a very small distance between the end of the electrolytic paper and the end of each foil (defective) Therefore, it is possible to increase the probability that any one of the foils comes into contact with the case 5, because the capacitor element 2 can be pressed against the case 5 and inspected. It is possible to more reliably determine that the electrolytic capacitor 1 to be determined as defective is defective. Further, since an aluminum oxide film is present on the inner surface of the case 5, depending on the electrolytic capacitor 1, at least one of the foil, the anode terminal 3, and the cathode terminal 4 is in contact with the case 5 due to manufacturing defects. Even in this state, the oxide film may temporarily be in an insulating state (high resistance state). Such an electrolytic capacitor 1 (electrolytic capacitor 1 to be determined as defective) is determined as a non-defective product in the state where no pressure or vibration is applied, but the oxide film is physically destroyed by applying pressure or vibration. Thus, it can be determined as a failure.

  For this reason, the control unit 15 outputs the control signal S2 to the moving mechanism 12, thereby causing the moving mechanism 12 to perform control for moving the chuck units 11a and 11b forward and backward with respect to the electrolytic capacitor 1. it can. According to this configuration, it is possible to apply vibration to the capacitor element 2 of the electrolytic capacitor 1, and it is possible to more reliably determine that the electrolytic capacitor 1 to be determined as defective as described above is defective. it can. In the above example, by controlling the moving mechanism 12, the moving mechanism 12 is caused to function as a vibration applying unit in the present invention so as to apply pressure and vibration to the capacitor element 2 of the electrolytic capacitor 1. It is also possible to provide a dedicated vibration application unit for applying pressure or vibration.

1 is a configuration diagram showing a configuration of an electrolytic capacitor 1 and a configuration of an electrolytic capacitor inspection device 10. FIG. 3 is an explanatory diagram for explaining an equivalent circuit of the electrolytic capacitor 1. FIG. The partial block diagram of the electrolytic capacitor inspection apparatus 10 in a state where the good electrolytic capacitor 1 is normally chucked, and the waveforms A and B, the determination area C, and the determination value D displayed on the display unit 14c in this state It is explanatory drawing. The partial block diagram of the electrolytic capacitor inspection apparatus 10 in a state where the electrolytic capacitor 1 in which the cathode terminal 4 is short-circuited with the case 5 is normally chucked, and the waveforms A and B and the determination area C displayed on the display unit 14c in this state It is explanatory drawing for demonstrating and determination value D. FIG. The partial block diagram of the electrolytic capacitor inspection apparatus 10 in the state where the electrolytic capacitor 1 whose anode terminal 3 is short-circuited with the case 5 is normally chucked, and the waveforms A and B and the determination area C displayed on the display unit 14c in this state It is explanatory drawing for demonstrating and determination value D. FIG. A partial configuration diagram of the electrolytic capacitor inspection device 10 in a state where a chuck failure has occurred in the chuck portion 11b, and waveforms A and B, a determination area C, and a determination value D displayed on the display portion 14c in this state It is explanatory drawing. A partial configuration diagram of the electrolytic capacitor inspection device 10 in a state where a chuck failure has occurred in the chuck portion 11a, and waveforms A and B, a determination area C, and a determination value D displayed on the display portion 14c in this state It is explanatory drawing. A partial configuration diagram of the electrolytic capacitor inspection device 10 in a state where the electrolytic capacitor 1 is chucked in the reversely mounted state (reverse polarity) on the chuck portions 11a and 11b, and waveforms A and B displayed on the display portion 14c in this state, It is explanatory drawing for demonstrating the determination area C and the determination value D. FIG. 4 is a flowchart showing an inspection process 50 of the electrolytic capacitor inspection device 10. 1 is a configuration diagram of a conventional inspection circuit 101 for an electrolytic capacitor 1. FIG. 2 is a configuration diagram in the case of inspecting the electrolytic capacitor 1 using a DC resistance meter 111. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrolytic capacitor 2 Capacitor element 3 Anode terminal 4 Cathode terminal 5 Case 11a, 11b Chuck part 13 Power supply part 13b Resistance 13c DC power supply 13d Anode output terminal 13e Cathode output terminal 14 Measuring instrument 14a, 14b, 14e, 14f Voltage detection probe 15 Control Part A Waveform (Voltage waveform)
B waveform (voltage waveform indicating the current waveform of current I)
C Judgment area D Judgment value V DC voltage

Claims (8)

An electrolytic capacitor inspection method for inspecting the presence or absence of a short circuit between the anode terminal of the electrolytic capacitor and the case,
A DC voltage from the DC power source is applied between the anode terminal and the cathode terminal of the electrolytic capacitor from a power supply unit configured by connecting a resistor and a DC power source in series between the anode output terminal and the cathode output terminal. And measuring the voltage waveform between the case and the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply from the start of application of the DC voltage,
Comparing the measured voltage waveform with a predetermined determination area and comparing the peak value of the measured current waveform with a predetermined determination value, the entire voltage waveform is included in the determination area. When the peak value is equal to or greater than the determination value, it is determined that the anode terminal and the case are in a non-short circuit state, and at least a part of the voltage waveform is not included in the determination area, and the peak When the value is equal to or greater than the determination value, it is determined that the short-circuit state between the anode terminal and the case is short-circuited, and at least a part of the voltage waveform falls below the lower limit voltage value of the determination area and the peak method of inspecting the electrolytic capacitor value when less than the determination value, before Symbol a cathode output terminal and the cathode terminal is determined to be in an unconnected state to be disconnected. As a result of the comparison between the measured voltage waveform and the determination area, and the comparison between the peak value and the determination value, at least a part of the voltage waveform exceeds the upper limit voltage value of the determination area, and the peak value There wherein when less than the determination value, the inspection method of the electrolytic capacitor according to claim 1, wherein the pre-Symbol anode output terminal and said anode terminal is determined to be in an unconnected state to be disconnected. An electrolytic capacitor inspection method for inspecting the presence or absence of a short circuit between the anode terminal of the electrolytic capacitor and the case,
A DC voltage from the DC power source is applied between the anode terminal and the cathode terminal of the electrolytic capacitor from a power supply unit configured by connecting a resistor and a DC power source in series between the anode output terminal and the cathode output terminal. And measuring the voltage waveform between the case and the anode output terminal of the power supply unit and the current waveform of the current output from the DC power supply from the start of application of the DC voltage,
Comparing the measured voltage waveform with a predetermined determination area and comparing the peak value of the measured current waveform with a predetermined determination value, the entire voltage waveform is included in the determination area. When the peak value is equal to or greater than the determination value, it is determined that the anode terminal and the case are in a non-short circuit state, and at least a part of the voltage waveform is not included in the determination area, and the peak When the value is equal to or greater than the determination value, it is determined that the short-circuit state between the anode terminal and the case is short-circuited, and at least a part of the voltage waveform exceeds the upper limit voltage value of the determination area and the peak when the value is less than the determination value, the inspection method of an electrolytic capacitor in which the anode output terminal and the anode terminal is determined to be in an unconnected state to be disconnected.   The method for inspecting an electrolytic capacitor according to claim 1, wherein pressure or vibration is applied between the anode terminal and the cathode terminal and the case when the voltage waveform is measured. An electrolytic capacitor inspection device for inspecting the presence or absence of a short circuit between the anode terminal of the electrolytic capacitor and the case,
A pair of chuck portions for chucking the anode terminal and the cathode terminal of the electrolytic capacitor;
A resistor and a DC power source are connected in series between the anode output terminal and the cathode output terminal, the anode output terminal is connected to one of the pair of chuck portions, and the cathode output terminal is connected to the pair of chuck portions. A power supply connected to the other of
The voltage waveform between the case and the anode output terminal of the power supply unit from the start of application of a DC voltage from the DC power supply of the power supply unit to the electrolytic capacitor chucked by the pair of chuck units and the DC The measurement processing for measuring the current waveform of the current output from the power supply by two channels, the measured voltage waveform and a predetermined determination area are compared, and the peak value of the measured current waveform is previously determined. Compared with the determined determination value, when the entire voltage waveform is included in the determination area and the peak value is equal to or higher than the determination value, the anode terminal and the case are in a non-short-circuit state. And when at least a part of the voltage waveform is not included in the determination area and the peak value is equal to or greater than the determination value, the anode terminal and the case are short-circuited. That determines that a short-circuit state, at least a portion of the voltage waveform is below the lower limit voltage value of the determination area, and when the peak value is less than the judgment value, and the said the previous SL cathode output terminal cathode terminal unconnected to become disconnected state executes and the determination process for determining a measuring instrument and it is an electrolytic capacitor testing apparatus comprising a. As a result of the comparison between the measured voltage waveform and the determination area, and the comparison between the peak value and the determination value, at least a part of the voltage waveform exceeds the upper limit voltage value of the determination area. and when the peak value is less than the determination value, before Symbol electrolytic capacitor testing apparatus of claim 5, wherein the anode output terminal and the anode terminal is determined to be in an unconnected state to be disconnected. An electrolytic capacitor inspection device for inspecting the presence or absence of a short circuit between the anode terminal of the electrolytic capacitor and the case,
A pair of chuck portions for chucking the anode terminal and the cathode terminal of the electrolytic capacitor;
A resistor and a DC power source are connected in series between the anode output terminal and the cathode output terminal, the anode output terminal is connected to one of the pair of chuck portions, and the cathode output terminal is connected to the pair of chuck portions. A power supply connected to the other of
The voltage waveform between the case and the anode output terminal of the power supply unit from the start of application of a DC voltage from the DC power supply of the power supply unit to the electrolytic capacitor chucked by the pair of chuck units and the DC The measurement processing for measuring the current waveform of the current output from the power supply by two channels, the measured voltage waveform and a predetermined determination area are compared, and the peak value of the measured current waveform is previously determined. Compared with the determined determination value, when the entire voltage waveform is included in the determination area and the peak value is equal to or higher than the determination value, the anode terminal and the case are in a non-short-circuit state. And when at least a part of the voltage waveform is not included in the determination area and the peak value is equal to or greater than the determination value, the anode terminal and the case are short-circuited. That determines that a short-circuit state, at least a portion of the voltage waveform exceeds the upper limit voltage value of the determination area, and when the peak value is less than the determination value, the anode output terminal and the anode terminal and the non connection to become unconnected state executes and the determination process for determining a measuring instrument and it is an electrolytic capacitor testing apparatus comprising a.   The electrolytic capacitor according to claim 5, further comprising a vibration applying unit that applies pressure or vibration between the anode terminal and the cathode terminal and the case when measuring the voltage waveform. Inspection device.

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