JP2002260974A - Leak current inspecting device for electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leak current inspecting device for an electrolytic capacitor, which can be made small on the whole without causing drop in reliability of inspection. SOLUTION: A parts feeder 1, an aging means 2, a conveying means 3, a console panel unit 4, an LC inspecting means 5, etc., are provided as a device for aging and subsequent leak current inspection. After discharging, charging is carried out by a 1st charging mechanism in the aging means 2, many capacitor elements held by a jig are taken out and charged by a 2nd charging mechanism while carried by an external conveying means 3. Then the LC inspecting means 5 measures a leak current and decides whether each carried capacitor element is normal. When the decision is made, corrections corresponding to a non-charging time are made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leakage current inspection device for an electrolytic capacitor, and more particularly to a technical field including an inspection device used for inspecting a leakage current of an electrolytic capacitor after an aging process. It is.

[0002]

2. Description of the Related Art Conventionally, in the process of manufacturing an electrolytic capacitor, an aging treatment is performed to repair a partial destruction of a dielectric oxide film generated during the manufacturing. When the electrolytic capacitor is subjected to aging treatment, a large number of electrolytic capacitors are held in a jig and heated in a heating furnace, and a predetermined voltage is supplied to the held electrolytic capacitors.

In such an electrolytic capacitor subjected to aging treatment, it is desirable that the leakage current (leak current) is small. If there is a leakage current exceeding a predetermined value, it must be excluded from the product as a defective product. . For this reason, the electrolytic capacitor that has been subjected to the aging process is subjected to an inspection (LC inspection) regarding a leakage current. In general,
The LC inspection means is provided outside the aging means. LC between the aging means and the LC inspection means
A conveyor is provided to perform charging for the inspection for a predetermined time. That is, the electrolytic capacitor aged by the aging means is once discharged in the final stage inside the aging means. Next, the battery is charged for a predetermined time (for example, 60 seconds) while being conveyed by a conveyor outside the aging means. Then, after charging for 60 seconds, the leakage current is inspected by the LC inspection means.

[0004]

However, in the above technology, it is necessary to secure a sufficient conveyor length to secure a predetermined charging time. For this reason, there is a possibility that the overall length of the apparatus will be increased by the length of the conveyor.

[0005] In particular, when the conveyor has a structure in which the electrolytic capacitor is transported intermittently little by little, at least during the transfer of the electrolytic capacitor (during movement).
Does not charge. Therefore, if the charging is performed for a predetermined time comprehensively, the conveyor length is inevitably long, and as a result, the above-mentioned problem is likely to occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and provides a leakage current inspection apparatus for an electrolytic capacitor capable of reducing the size of the entire apparatus without reducing the reliability of the inspection. Providing is one of the main purposes.

[0007]

Means for Solving the Problems and Effects There will be described below characteristic means for achieving the above object. Also,
For each means, characteristic actions and effects will be described as necessary.

Means 1. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor that has been subjected to aging processing by an aging means, wherein the leakage current inspection apparatus is provided inside the aging means, and the aging-discharged electrolytic capacitor is charged for inspection. A first charging mechanism provided outside the aging means, and a second charging mechanism for further performing an inspection charge on the electrolytic capacitor charged by the first charging mechanism; and a aging means. An inspection means provided externally for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism.

According to the means 1, the electrolytic capacitor which has been aged and discharged inside the aging means is
Inspection charging is performed by a first charging mechanism provided inside the aging means. Further, the electrolytic capacitor is further charged for inspection by a second charging mechanism provided outside the aging means. Then, a leakage current of the electrolytic capacitor is inspected by an inspection unit provided outside the aging unit.
In this way, by performing charging in advance inside the aging means, it is possible to reduce the charging time outside the aging means. Therefore, while ensuring a sufficient charging time, at least the installation space for the second charging mechanism can be reduced as compared with the related art. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 2. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor that has been subjected to aging processing by an aging means, wherein the leakage current inspection apparatus is provided inside the aging means, and the aging-discharged electrolytic capacitor is charged for inspection. A first charging mechanism provided outside the aging means, and a second charging mechanism for further performing an inspection charge on the electrolytic capacitor charged by the first charging mechanism; and a aging means. Inspection means provided outside and inspecting a leak current of the electrolytic capacitor charged by the second charging mechanism, and the electrolytic capacitor, at least from the aging means via the second charging mechanism. A leakage current inspection device for an electrolytic capacitor, comprising: a transportation unit for transporting the battery to the inspection unit.

According to the means 2, for the electrolytic capacitor which has been aged and discharged inside the aging means,
Inspection charging is performed by a first charging mechanism provided inside the aging means. Further, the electrolytic capacitor is further charged for inspection by a second charging mechanism provided outside the aging means. Then, a leakage current of the electrolytic capacitor is inspected by an inspection unit provided outside the aging unit.
Here, the electrolytic capacitor is transported by the transporting means from at least the aging means to the inspection means via the second charging mechanism. In this way, by performing charging in advance inside the aging means, it is possible to reduce the charging time outside the aging means. Therefore, it is possible to reduce the installation space and the transport space of the second charging mechanism as compared with the related art while securing a sufficient charging time. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 3. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to an aging process by an aging means, which is provided inside the aging means and ages and discharges in a state where a plurality of jigs are attached to the jig. For the electrolytic capacitor
A first charging mechanism for charging for inspection while being attached, and an electrolytic capacitor charged by the first charging mechanism and removed from the jig, are externally attached to the aging means. A transport unit capable of transporting one by one, a second charging mechanism for further performing a charging for inspection on the electrolytic capacitor being transported by the transport unit, and a second charging mechanism by the transport unit. An inspection means for inspecting a leakage current of the electrolytic capacitor conveyed from the mechanism.

According to the means (3), the first charging mechanism provided inside the aging means is provided for the electrolytic capacitor which has been aged and discharged in a state where a plurality of jigs are attached to the jig inside the aging means. Thereby, charging for inspection is performed in the attached state. Further, the electrolytic capacitors charged by the first charging mechanism and removed from the jig are transported one by one outside the aging means by the transport means. Further, the electrolytic capacitor being conveyed by the conveying means is further charged for inspection by the second charging mechanism. Then, a leakage current of the electrolytic capacitor transported from the second charging mechanism by the transport unit is inspected by the inspection unit. In this way, by performing charging in advance inside the aging means, it is possible to reduce the charging time outside the aging means. Therefore, while securing a sufficient charging time, the installation space for the second charging mechanism,
The transport space can be reduced as compared with the conventional case. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 4. The inspection means is configured to measure a leakage current of the electrolytic capacitor charged by the second charging mechanism, and make a pass / fail judgment based on the measurement result. 3. The leakage current inspection device for an electrolytic capacitor according to any one of 3.

[0015] According to the means 4, the inspection means measures the leak current of the electrolytic capacitor charged by the second charging mechanism. Then, a pass / fail judgment is made based on the measurement result. For this reason, in addition to the above-described respective effects, there is an advantage that the reliability of the determination is not reduced.

Means 5 The means (1), wherein the inspection means is provided immediately downstream of the second charging mechanism.
5. The leakage current inspection device for an electrolytic capacitor according to any one of claims 1 to 4.

According to the means 5, since the inspection means is provided immediately downstream of the second charging mechanism, it is possible to eliminate disadvantages caused by a time interval from the end of charging by the second charging mechanism. And the reliability of the inspection can be further prevented from lowering.

Means 6 A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor that has been subjected to aging processing by an aging means. A second charging mechanism which is provided outside the aging means and which is charged by the first charging mechanism and which is further subjected to a non-charging period and which is further charged for inspection. A charging mechanism provided outside the aging means, and an inspection means for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism. Inspection equipment.

According to the means 6, the electrolytic capacitor which has been aged and discharged inside the aging means is
Inspection charging is performed by a first charging mechanism provided inside the aging means. After the non-charging period has elapsed, the electrolytic capacitor is further charged for inspection by a second charging mechanism provided outside the aging means. Then, a leakage current of the electrolytic capacitor is inspected by an inspection unit provided outside the aging unit. In this way, by performing charging in advance inside the aging means, it is possible to reduce the charging time outside the aging means. Therefore, while ensuring a sufficient charging time, at least the installation space for the second charging mechanism can be reduced as compared with the related art.
As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 7. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor that has been subjected to aging processing by an aging means, wherein the leakage current inspection apparatus is provided inside the aging means, and the aging-discharged electrolytic capacitor is charged for inspection. A second charging mechanism which is provided outside the aging means and which is charged by the first charging mechanism and which is further subjected to a non-charging period and which is further charged for inspection. A charging mechanism, an inspection means provided outside the aging means, for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism, and at least the And a transport unit for transporting the battery to the inspection unit via the charging mechanism of (2). Inspection equipment.

According to the means 7, the aging and discharging of the electrolytic capacitor inside the aging means
Inspection charging is performed by a first charging mechanism provided inside the aging means. After the non-charging period has elapsed, the electrolytic capacitor is further charged for inspection by a second charging mechanism provided outside the aging means. Then, a leakage current of the electrolytic capacitor is inspected by an inspection unit provided outside the aging unit. Here, the electrolytic capacitor is transported by the transporting means from at least the aging means to the inspection means via the second charging mechanism. In this way, by being charged in advance inside the aging means,
The charging time outside the aging means can be reduced. Therefore, it is possible to reduce the installation space and the transport space of the second charging mechanism as compared with the related art while securing a sufficient charging time. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 8 A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to an aging process by an aging means, which is provided inside the aging means and ages and discharges in a state where a plurality of jigs are attached to the jig. For the electrolytic capacitor
A first charging mechanism for charging for inspection while being attached, and an electrolytic capacitor charged by the first charging mechanism and removed from the jig, are externally attached to the aging means. In the present invention, a transporting means capable of transporting one by one, and a predetermined non-charging period has elapsed since the charging was performed by the first charging mechanism, and the electrolytic capacitor being transported by the transporting means A second charging mechanism for charging for inspection and the second charging mechanism
Inspection means for inspecting the leakage current of the electrolytic capacitor transported from the charging mechanism of (1).

According to the means (8), a plurality of electrolytic capacitors which have been aged and discharged in a state where a plurality of jigs are attached to the jig inside the aging means are provided with the first charging means provided inside the aging means. By the mechanism, charging for inspection is performed in the attached state. Also,
The electrolytic capacitors charged by the first charging mechanism and removed from the jig are transported one by one outside the aging means by the transport means. Further, a predetermined non-charging period has elapsed since the charging was performed by the first charging mechanism, and the electrolytic capacitor being transported by the transporting means is further inspected by the second charging mechanism. Is charged. Then, a leakage current of the electrolytic capacitor transported from the second charging mechanism by the transport unit is inspected by the inspection unit. In this way, by being charged in advance inside the aging means,
The charging time outside the aging means can be reduced. Therefore, it is possible to reduce the installation space and the transport space of the second charging mechanism as compared with the related art while securing a sufficient charging time. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

Means 9 The means (6), wherein the inspection means is provided immediately downstream of the second charging mechanism.
9. The leakage current inspection device for an electrolytic capacitor according to any one of claims 8 to 8.

According to the means 9, since the inspection means is provided immediately downstream of the second charging mechanism, it is possible to eliminate disadvantages caused by a time interval from the end of charging by the second charging mechanism. And the reliability of the inspection can be further prevented from lowering.

Means 10. The inspection means is configured to measure a leakage current of the electrolytic capacitor charged by the second charging mechanism, and make a pass / fail judgment based on the measurement result. 9
The leakage current inspection device for an electrolytic capacitor according to any one of the above.

According to the means 10, the inspection means measures the leakage current of the electrolytic capacitor charged by the second charging mechanism. Then, a pass / fail judgment is made based on the measurement result. For this reason, in addition to the above-described respective effects, there is an advantage that the reliability of the determination is not reduced.

Means 11. The inspection unit performs a pass / fail determination based on comparing the measurement result with a preset set value, and performs the non-charging period on the measurement result or the set value prior to the comparison. 11. The leakage current inspection device for an electrolytic capacitor according to claim 10, wherein the correction is performed according to the following, and then the comparison is performed.

According to the means 11, the inspection means makes a pass / fail judgment based on the comparison between the measurement result and a preset value. Prior to the comparison, the measurement result or the set value is corrected according to the non-charging period, and then the comparison is performed. Here, when the non-charging period until charging by the second charging mechanism is different for each capacitor, there is a possibility that the measurement result of the inspection unit may be affected. The comparison is performed after the correction in accordance with. Therefore, even if the non-charging period differs for each capacitor, the adverse effect caused by the difference can be eliminated. As a result, the accuracy of the pass / fail judgment is improved.

Means 12. The inspection means measures a leak current of the electrolytic capacitor charged by the second charging mechanism, and performs a correction according to the measurement result in accordance with the non-charging period. The leakage current inspection device for an electrolytic capacitor according to any one of means 6 to 9, wherein

According to the means 12, the inspection means measures the leak current of the electrolytic capacitor charged by the second charging mechanism. Then, the measurement result is corrected according to the non-charging period. For this reason, even if the non-charging period differs for each capacitor, the effect of the difference in the non-charging period is eliminated by the correction, so that the inspection accuracy can be improved.

Means 13 13. The leakage current inspection apparatus for an electrolytic capacitor according to claim 1, wherein a charging time by the first charging mechanism is longer than a charging time by the second charging mechanism.

According to the means 13, the charging time performed outside the aging means can be made relatively short. Therefore, while securing sufficient charging time,
The installation space and the like of the charging mechanism can be reduced as compared with the related art. As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described below with reference to FIGS.

As shown in FIGS. 1 and 2, in the present embodiment, parts feeder 1, aging means 2, transport means 3, operation panel unit 4, and LC inspection means are used as devices relating to aging processing and subsequent leakage current inspection. 5 and the like are provided.

A large number of capacitor elements 6 (see FIG. 4 and the like) constituting an electrolytic capacitor are stored in the parts feeder 1. The capacitor elements 6 before the aging process are transferred from the parts feeder 1 to the aging means by the conveying means 3. 2 is conveyed. The conveying means 3 is constituted by a conveyor, and is capable of intermittently transferring the capacitor elements 6 one by one. The capacitor element 6 subjected to the aging process or the like by the aging means 2 is transported by the transport means 3 to the LC inspection means 5. And
The LC inspection means 5 measures the leakage current and determines the quality of each conveyed capacitor element 6. The operation panel unit 4 is provided with various input switches and the like, and data (quantity, capacity, model) and the like regarding the capacitor element 6 and the like are input based on the operation of the switches and the like.

Here, the basic configuration of the aging means 2 will be described. As shown in FIGS. 3 and 4, the aging means 2 in the present embodiment includes a heating mechanism 12 for heating the capacitor element 6 and a feeding mechanism 13 for rotating and feeding the capacitor element 6. Feed mechanism 1
3 is provided with a bearing 14, and the bearing 14 has a rotating shaft 15
Are rotatably supported. A wheel-like rotating body 18 for transporting a jig 17 for holding the capacitor element 6 is attached to the rotating shaft 15 at two predetermined intervals. The rotating body 18 is configured to be rotated at a predetermined speed by rotating a drive motor (not shown).

A concave portion (not shown) is provided on the outer periphery of each rotating body 18.
And the projections 20 are formed alternately in a gear shape. A pair of positioning pins 21 are attached to the rotating body 18 for each projection 20. A plurality of long jigs 17 (for example, about 60 to 100) are provided on the outer circumference of the pair of rotating bodies 18.
(80 in the present embodiment). The jig 17 is adapted to be attached to each of the projections 20 of the rotating body 18, and a holder 26 for engaging with the positioning pin 21 for positioning.
And are attached to the holder 26 on both sides of the convex portion 20, and
A long insulating plate 27 extending between the rotating bodies 18. In the present embodiment, for example, 60 capacitor elements 6 are simultaneously held per one jig 17.

In the above configuration, when the jig 17 reaches the supply position of the capacitor element 6, a cam mechanism (not shown) is operated, and the supply of the capacitor element 6 is enabled. After the capacitor element 6 is supplied, the holding of the capacitor element 6 and the electrical conduction to the capacitor element 6 are achieved together.

On the outer circumference of the transfer path of the jig 17, about 270
A housing 41 is provided which covers over time. The housing 41 annularly surrounds the outer circumference of the transfer path of the jig 17 and is separated from the outside. Housing 4
A heat insulating material is provided on the inner surface of the bearing 1.
The rotating shaft 15 is provided by a disc-shaped frame 42 attached to the
It is supported concentrically. Further, a blower (not shown) is provided at one circumferential end of the housing 41 so that the capacitor element 6 and the like during aging are heated.

Next, the basic operation of the aging means 2 in this embodiment will be briefly described. Feed mechanism 1
In 3, the rotating body 18 is intermittently rotated in a predetermined direction. The jig 17 attached to the outer periphery of the rotating body 18
Is reached at a predetermined position, the removal of a large number of capacitor elements 6 held by the jig 17 and the supply of new capacitor elements 6 to the jig 17 are performed by a supply / extraction unit (not shown). On the other hand, in the housing 41, the heated hot air is circulated by the blower. Therefore, the capacitor element 6 held by the jig 17 is heated by the hot air while moving in a predetermined direction together with the jig 17. During this time, a predetermined voltage is supplied via the jig 17 to perform an aging process.

In this embodiment, a plurality of types of power supplies having different power supply voltages are prepared, and the supplied voltage is gradually increased in the aging means 2 as the jig 17 moves. It has become. However, FIG.
As shown in (2), in the final stage of aging, after the aging is completed, the discharge of the jig 17 starts from a predetermined point, and complete discharge is performed once.

In the present embodiment, after the discharging is performed in the aging means 2, charging for LC inspection is performed in advance for a predetermined time (for example, 50 seconds). That is, inside the aging means 2,
The first charging mechanism 51 at a stage subsequent to the discharge region
Is provided.

The housing 41 of the aging means 2
When the jig 17 reaches the end (exit), the jig 17
Are taken out and transported by the transporting means 3. A second charging mechanism 52 is provided in the middle of the transport means 3 so as to separate a curved portion of the transport path (the left portion in FIG. 5: for example, 10 positions) from the outlet. In the second charging mechanism 52, the capacitor element 6
While being transferred intermittently by position, charging is performed at predetermined time intervals. In the present embodiment, the movement time of one position is set to, for example, about 0.5 seconds, and charging at each position is performed for about 0.5 seconds. Note that the LC inspection means 5 is provided immediately downstream of the second charging mechanism 52, and immediately after the charging by the second charging mechanism 52 is completed, the inspection (measurement and pass / fail judgment) by the LC inspection means 5 is performed. ) Is performed.

Prior to the transport, 60 capacitor elements 6 are taken out of the jig 17 at a time. However, the leading capacitor element 6 and the terminating capacitor element 6 are removed from the outlet at the same time. A difference occurs in the time required to reach the second charging mechanism 52 (non-charging time). That is, the top capacitor element 6 is
Reaching the second charging mechanism 52 relatively quickly after a non-charging period (about 10 seconds) for the position. On the other hand, the capacitor element 6 on the terminal side arrives at the second charging mechanism 52 with a delay of 59 pieces (after about 70 seconds) from the capacitor element 6 on the head side.

Therefore, in the present embodiment, the influence of the difference in the non-charging time for the capacitor elements 6 from the first side (first) to the last side (60th) is considered in consideration of the influence. Above, the pass / fail judgment regarding the leakage current of the capacitor element 6 is performed. More specifically, the influence of the difference in the non-charging time is experimentally measured for the capacitor element 6 to be inspected in advance, and the measured value (actually measured value) at the time of the inspection is set as the correction value.
Is to be corrected.

Here, the setting of the correction value will be described.
For example, FIGS. 6A and 6B are circuit diagrams configured to perform predetermined charging of the capacitor element 6 in consideration of the existence of the non-charging time. As shown in the figure, in this circuit configuration, first to third timer relays TR1 to TR
R3 is provided. The first timer relay TR1 is
Charging during aging (charging by the first charging mechanism 51)
Is provided for a predetermined time (here, 5
0 second). The first timer relay TR1 is provided to the capacitor element 6 via a positive temperature coefficient thermistor PO, and includes a so-called b contact which is normally turned on, and an on-delay type solenoid. When the predetermined time (50 seconds) elapses (time-up) from the start of charging (timing t1 in FIG. 7), the timer relay TR1 excites the solenoid to turn off the contact b (see FIG. 7). Timing t2). Thereby, the charging (first charging) corresponding to the charging by the first charging mechanism 51 is terminated.

The second timer relay TR2 is provided for transport in a non-charging state, and prohibits charging. This second timer relay TR2 connects the resistance RE to the capacitor element 6.
And a b for demagnetizing an off-delay type solenoid of a third timer relay TR3, which will be described later, which is normally turned off.
It has a contact and an on-delay type solenoid. The second timer relay TR2 is connected to the amplifier AP to which the third timer relay TR3 is connected. The second timer relay TR2 starts timing at the same time as the first timer relay TR1 (timing t1). Then, when a time obtained by adding the non-charging time (10 seconds to 70 seconds; variable time) to the predetermined time (50 seconds) elapses (timing t3 in FIG. 7), the contact a of the second timer relay TR2 is turned on. It is turned on. Thereby, charging via the resistor RE and the amplifier AP is allowed.

That is, the third timer relay TR3
This is provided assuming charging by the second charging mechanism 52, and allows the capacitor element 6 to be charged for a predetermined time (here, 10 seconds). This third
The timer relay TR3 is provided corresponding to the amplifier AP as described above, and includes a so-called a contact which is normally in an off state, and an off-delay type solenoid. In the third timer relay TR3, the input of the solenoid is turned off based on the time-up of the second timer relay TR2 (timing t3),
Timing starts. When the predetermined time (10 seconds) elapses, the contact a is turned off (timing t4 in FIG. 7), whereby the measurement is performed.

In the present embodiment, immediately after the end of the second charging, the leakage current of the corresponding capacitor element 6 is measured for each different non-charging time. Then, such measurement is repeated a plurality of times for the same or the same type of capacitor element 6. As a result, leak current data corresponding to different non-charging times from 10 seconds to 70 seconds can be obtained. Then, a correction value is determined based on each data.

The method of determining the correction value is not particularly limited, but can be determined as follows, for example. That is, when the average value of the data decreases as the non-charge time increases with respect to the average value of the data when the non-charge time is 10 seconds, the decrease is commensurate with the decrease. It is a correction value (for example, a positive value). On the other hand, when the average value of the data increases as the non-charge time increases more than 10 seconds, a correction value (for example, a negative value) commensurate with the increase is used.

Next, the steps and effects of measuring and inspecting the leakage current of the capacitor element 6 using the apparatus configured as described above will be described.

After discharging is performed in the aging means 2, charging in the first charging mechanism 51 is performed for a predetermined time (50 seconds; T2-T1) as shown in FIG.
During this time, the value I of the leak current decreases as charging proceeds (between timings T1 and T2 in FIGS. 9A and 9B).

Next, the housing 41 of the aging means 2
When the jig 17 reaches the end (exit), the jig 17
Are taken out and transported by the transporting means 3. Then, after a non-charging period (T3-T2; T3 is variable) of 10 seconds to 70 seconds (the period from the removal of the capacitor element 6 to the start of transport is not taken into account for convenience), the second charging mechanism 52. In the second charging mechanism 52, while the capacitor element 6 is intermittently transferred one position at a time, charging is performed for a predetermined time. During this time, the value I of the leak current decreases again as the charging proceeds (from the timing T3a to the timing T3a in FIGS. 9A and 9B).
4a or between timings T3b and T4b). Then, a total of about 10 seconds (T4
After the charging of -T3) is performed, it is transported to the LC inspection means 5.

In the LC inspection means 5, the leakage current is measured and the quality of each capacitor element 6 is determined. That is, it is assumed that the measured value of the leak current measured by the LC inspection means 5 for the predetermined capacitor element 6 is “A”. Here, LC inspection means 5
Then, the order of the capacitor element 6 is determined (any one of the first to the 60th is determined), and the correction value α is determined according to the determination result. Further, a value (corrected value) obtained by adding (or subtracting) the correction value α to the measured value “A” is compared with a predetermined set value C. If the corrected value is smaller than the set value, it is determined to be non-defective and transported to the next step. On the other hand, if the corrected value is equal to or larger than the set value, it is determined to be defective and is excluded from the product.

As described above, according to the present embodiment, charging is performed in advance inside the aging means 2.
Therefore, the charging time outside the aging means 2 can be reduced. Therefore, the space for installing the second charging mechanism 51 and the space for the transporting means 3 can be reduced as compared with the conventional one while securing a sufficient charging time.
As a result, the size of the entire apparatus can be reduced while maintaining the reliability of the inspection.

On the other hand, in the present embodiment, the LC inspection means 5 is provided outside the aging means 2. Here, when the inspection is performed inside the aging means, the leakage current of a large number (for example, 60) of the capacitor elements must be measured at a time, and the circuit for the measurement is extremely complicated. On the other hand, in the present embodiment, since the measurement is performed one by one outside the aging means 2, there is an advantage that the circuit configuration can be simplified.

Further, in the present embodiment, the LC inspection means 5 makes a pass / fail judgment based on a comparison between the measured value and a preset set value.
Prior to the comparison, the measured value is corrected according to the non-charging period. Then, after such correction is performed, the comparison is performed. Here, the second charging mechanism 52
If the non-charging period before the charging is started differs for each capacitor element 6 as in the present embodiment, the actual measured value may be affected. On the other hand, in the present embodiment, the comparison is performed after performing the correction according to the non-charging period. Therefore, even if the non-charging period differs for each capacitor element 6, the adverse effect due to the difference can be eliminated. As a result, the accuracy of the pass / fail judgment can be improved.

In particular, when a large number of capacitor elements 6 are attached to one jig 17 and an aging process is performed, many capacitor elements 6 are led out at once,
It is necessary to charge them while carrying them. When a large number of capacitor elements 6 are subjected to the aging process, the difference in the non-charging time tends to increase. On the other hand, the correction according to the present embodiment is extremely effective in that the influence of the difference can be eliminated.

The present invention is not limited to the above-described embodiment, but may be implemented, for example, as follows.

(A) In the above embodiment, the charging time by the first charging mechanism 51 is set to 50 seconds, and the second charging mechanism 5
2 is 10 seconds, and the total charging time is 6 seconds.
It was set to 0 seconds. Thus, the first charging mechanism 51
By setting the charging by a relatively long time, the space for charging in the second charging mechanism 52 can be shortened (reduced).

On the other hand, the total charging time is not limited to 60 seconds.
It may be 0 seconds or 50 seconds. Alternatively, charging may be performed for a time longer than 60 seconds. Furthermore, the charging time of the second charging mechanism 5 is longer than the charging time of the first charging mechanism 51.
The charging time in Step 2 may be set longer.

(B) In the above embodiment, the influence of the difference in the non-charging time is experimentally measured for the capacitor element 6 to be inspected in advance, and the measured value at the time of inspection is determined by using the effect as a correction value. (Measured value) is to be corrected. On the other hand, the effect at the actual device level may be measured empirically, and the correction value may be set in consideration of the effect.

(C) The transport by the transport means 3 need not be intermittent. Therefore, the transporting means 3 may be configured to continuously transport the capacitor element 6.

(D) In the above-described embodiment, the non-charging portion for 10 positions is provided in consideration of the curved transport path of the transport means 3, but the aging means is provided without providing such an empty position. 2 near exit 2
The charging mechanism 52 may be provided.

(E) At the time of inspection, there may be cases where correction as in the above embodiment is not performed.

(F) In the above embodiment, the LC inspection means 5 performs the measurement and the pass / fail judgment.
Instead, only the measurement may be performed. Further, instead of the pass / fail judgment, the measured value of the leakage current (which may or may not be corrected) for each capacitor element 6 may be ranked in a plurality of stages.

(G) In the aging means 2, the jig 1
Although the embodiment is embodied in the case of transporting by attaching the rotating member 18 to the rotating body 18, the rotating body 18 is not necessarily required. For example, the jig 17 is a chain (a wire or a belt may be used).
Alternatively, it may be conveyed by being attached at a predetermined interval to an endless strip that moves circularly. Further, the heating device may be linear. That is, the shapes and specifications of the heating device and the transfer device are not limited to those in the above-described embodiment.

(H) The number of jigs 17 held and the number of jigs 1
The number of capacitor elements 6 held in 7 is not limited to that of the above embodiment.

[Brief description of the drawings]

FIG. 1 is a diagram showing an apparatus and the like relating to an aging process and a subsequent leak current inspection in one embodiment,
(A) is a plan view and (b) is a front view.

FIG. 2 is a side view showing an apparatus and the like relating to an aging process and a subsequent leak current inspection.

FIG. 3 is a sectional view showing a configuration of an aging unit.

FIG. 4 is a partial cross-sectional view showing a jig and the like located at an aging means.

FIG. 5 is a schematic diagram showing a flow up to an aging process and a subsequent leak current inspection.

FIGS. 6A and 6B are diagrams showing a circuit configuration used for setting a correction value.

FIG. 7 is a timing chart showing the operation (time measurement) of a timer relay with the passage of time.

FIG. 8 is a timing chart for explaining operation states of a first charging mechanism, a second charging mechanism, and the like with the passage of time.

FIGS. 9A and 9B are graphs showing examples of the relationship between the leakage current and the passage of time for capacitor elements having different non-charge times.

[Description of Signs] 2 ... Aging means, 3 ... Conveying means, 5 ... LC inspection means, 6 ... Capacitor element as electrolytic capacitor, 17
... Jig, 51 ... First charging mechanism, 52 ... Second charging mechanism.

Claims (13)

[Claims] 1. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to aging processing by an aging means, wherein the electrolytic capacitor is provided inside the aging means and has been aged and discharged. Charging for inspection first
A second charging mechanism that is provided outside the aging means and further charges the electrolytic capacitor charged by the first charging mechanism for inspection; and a second charging mechanism provided outside the aging means. An inspection means for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism. 2. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to aging processing by an aging means, wherein the electrolytic capacitor is provided inside the aging means and has been subjected to aging and discharge. Charging for inspection first
A second charging mechanism that is provided outside the aging means and further charges the electrolytic capacitor charged by the first charging mechanism for inspection; and a second charging mechanism provided outside the aging means. Inspection means for inspecting the leakage current of the electrolytic capacitor charged by the second charging mechanism; and at least the aging means to the electrolytic means from the aging means to the inspection means via the second charging mechanism. And a carrying means for carrying the battery. 3. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to aging processing by an aging means, wherein the leakage current inspection apparatus is provided inside the aging means and is attached to a jig. A first charging mechanism for performing an inspection charge on the electrolytic capacitor subjected to aging and discharging in the state in the attached state, and charging is performed by the first charging mechanism, and The electrolytic capacitor removed from the jig is transported one by one outside the aging unit, and the electrolytic capacitor being transported by the transport unit is further charged for inspection. A charging mechanism; and an inspection unit configured to inspect a leakage current of the electrolytic capacitor transported from the second charging mechanism by the transport unit. Leakage current test device of the electrolytic capacitor. 4. The inspection means is configured to measure a leakage current of the electrolytic capacitor charged by the second charging mechanism, and make a pass / fail judgment based on the measurement result. The leakage current inspection device for an electrolytic capacitor according to any one of claims 1 to 3. 5. The leakage current inspection device for an electrolytic capacitor according to claim 1, wherein the inspection unit is provided immediately downstream of the second charging mechanism. 6. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to an aging process by an aging means, wherein the electrolytic capacitor is provided inside the aging means and has been subjected to aging and discharging. Charging for inspection first
And a second charging mechanism that is provided outside the aging means and is charged by the first charging mechanism, and further performs an inspection charge on the electrolytic capacitor after a non-charging period. An inspection means provided outside the aging means for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism. 7. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to an aging process by an aging means, wherein the electrolytic capacitor is provided inside the aging means and has been subjected to aging and discharging. Charging for inspection first
And a second charging mechanism that is provided outside the aging means and is charged by the first charging mechanism, and further performs an inspection charge on the electrolytic capacitor after a non-charging period. An inspection means provided outside the aging means for inspecting a leakage current of the electrolytic capacitor charged by the second charging mechanism; and the electrolytic capacitor is provided at least from the aging means to the second charging mechanism. And a transport unit for transporting the battery to the inspection unit via the inspection unit. 8. A leakage current inspection device for inspecting a leakage current of an electrolytic capacitor subjected to aging processing by an aging means, wherein the leakage current inspection apparatus is provided inside the aging means and is attached to a jig. A first charging mechanism for performing an inspection charge on the electrolytic capacitor subjected to aging and discharging in the state in the attached state, and charging is performed by the first charging mechanism, and A predetermined non-charging period has elapsed since the electrolytic capacitor removed from the jig was transported one by one outside the aging device and transported by the first charging mechanism. A second charging mechanism for further charging the electrolytic capacitor being conveyed by the conveyance means for inspection, and a second charging mechanism conveyed from the second charging mechanism by the conveyance means. Leakage current test device of the electrolytic capacitor, characterized in that a test means for testing the leakage current of the electrolytic capacitor. 9. An apparatus according to claim 6, wherein said inspection means is provided immediately downstream of said second charging mechanism. 10. The inspection means is configured to measure a leakage current of the electrolytic capacitor charged by the second charging mechanism, and make a pass / fail judgment based on the measurement result. The leakage current inspection device for an electrolytic capacitor according to any one of claims 6 to 9, wherein 11. The inspection means performs a pass / fail judgment based on comparing the measurement result with a preset setting value, and performs the measurement result or the setting value prior to the comparison. The leak current inspection apparatus for an electrolytic capacitor according to claim 10, wherein the correction is performed according to the non-charging period, and then the comparison is performed. 12. The inspection means measures a leakage current of the electrolytic capacitor charged by the second charging mechanism, and performs a correction according to the measurement result according to the non-charging period. The leakage current inspection device for an electrolytic capacitor according to any one of claims 6 to 9, wherein: 13. The leak current inspection of an electrolytic capacitor according to claim 1, wherein a charging time by the first charging mechanism is longer than a charging time by the second charging mechanism. apparatus.