CN214750630U - Device suitable for electricity of big appearance value piece formula multilayer ceramic dielectric capacitor smelts always - Google Patents
Device suitable for electricity of big appearance value piece formula multilayer ceramic dielectric capacitor smelts always Download PDFInfo
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- CN214750630U CN214750630U CN202121024984.9U CN202121024984U CN214750630U CN 214750630 U CN214750630 U CN 214750630U CN 202121024984 U CN202121024984 U CN 202121024984U CN 214750630 U CN214750630 U CN 214750630U
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Abstract
The application relates to a device suitable for electrical aging of a large-capacitance chip type multilayer ceramic dielectric capacitor, belonging to the technical field of electrical aging equipment of capacitors, and comprising an oven, a plurality of screening mother boards placed in the oven, a plurality of screening daughter cards connected with the screening mother boards, a plurality of capacitors connected with the screening daughter cards, and a heating element arranged in the oven and used for heating the screening mother boards; the cavity that is used for placing the screening mother board in the oven is called and holds the cavity, it connects in holding cavity chamber wall's bracing piece, releasable connection in the bracing piece and be used for supporting the backup pad of screening mother board to hold to be provided with in the cavity, a plurality of mounting grooves that are used for inlaying the backup pad are seted up to the bracing piece, backup pad partly stretches out the mounting groove, the backup pad is set up in the backup pad stretches out the part of mounting groove. The problem of bolted connection backup pad, take place the oxidation easily under high temperature environment and cause to be difficult to dismantle the maintenance is solved in this application.
Description
Technical Field
The application relates to the technical field of capacitor electricity aging equipment, in particular to a device suitable for electricity aging of a large-capacitance value chip type multilayer ceramic capacitor.
Background
Capacitors are essential for use in circuits as one of three large passive devices. Compared with capacitors with other media, the chip multilayer ceramic dielectric capacitor has the characteristics of small volume, light weight, no polarity, large specific volume and the like, has smaller equivalent series resistance and equivalent series inductance in a circuit, has the use advantage which is more and more accepted by users, and particularly, the chip multilayer ceramic dielectric capacitor with small size and large capacitance value gradually makes the replacement of a tantalum capacitor or an aluminum electrolytic capacitor possible.
The high-temperature aging screening device generally comprises an oven, a power supply, a screening mother board, a screening daughter card and a timer, wherein a plurality of capacitors are connected in parallel on the daughter card, the daughter card connected with the plurality of capacitors is connected on the screening mother board, then the screening mother board is erected on a supporting plate in the oven and is connected with the power supply, the rated voltage which is twice as high as the capacitor is provided, a heating device in the oven provides the upper limit temperature environment for the capacitor, each capacitor is connected in series with a fuse, when the capacitor fails, a circuit is in a short circuit state, at the moment, the fuse is fused, and the fuse plays a role in protecting a printed board from being burnt.
Among the above-mentioned technique, the oven is in the high temperature detection state for a long time, and bolted connection is passed through to the backup pad in the oven, and the bolt is under high temperature, takes place oxidation reaction more easily, leads to the intensity reduction of bolt, and then leads to the backup pad to rotate the bolt and dismantle when maintaining, causes the condition that the bolt was twisted off to take place easily.
SUMMERY OF THE UTILITY MODEL
In order to solve the bolted connection backup pad, take place the oxidation easily under high temperature environment and cause the problem that is difficult to dismantle the maintenance, this application provides a device suitable for big capacity value piece formula multilayer ceramic dielectric capacitor electricity is always smelt.
A device suitable for electrical ageing of a large-capacity value chip type multilayer ceramic capacitor comprises an oven, a plurality of screening mother boards placed in the oven, a plurality of screening daughter cards connected to the screening mother boards, a plurality of capacitors connected to the screening daughter cards, and a heating element arranged in the oven and used for heating the screening mother boards; the cavity that is used for placing the screening mother board in the oven is called and holds the cavity, it connects in holding cavity chamber wall's bracing piece, releasable connection in the bracing piece and be used for supporting the backup pad of screening mother board to hold to be provided with in the cavity, a plurality of mounting grooves that are used for inlaying the backup pad are seted up to the bracing piece, backup pad partly stretches out the mounting groove, the backup pad is set up in the backup pad stretches out the part of mounting groove.
Through the technology, a plurality of capacitors are sequentially installed on the screening daughter cards by a detector in a parallel mode, the screening daughter cards are connected to the screening mother board, the screening mother board is placed in the containing cavity, the capacitor is in a double rated voltage detection environment by connecting a power supply, and a heating element in the oven provides an upper limit temperature environment for the capacitor. A in the mounting groove for supporting the backup pad embedding bracing piece of screening mother board, with backup pad detachable connection in bracing piece, the screening mother board sets up the part that stretches out the mounting groove in the backup pad, and the backup pad is connected in the bracing piece through the mode of joint, has replaced bolted connection, has solved bolt high temperature oxidation and has caused bolt intensity low, makes the bolt take place by the condition of twisting off when rotating the bolt.
Preferably, one end, embedded into the mounting groove, of the support plate is called an embedded end, one end, extending out of the mounting groove, of the support plate is called an extending end, and the joint of the embedded section and the extending end is in arc-shaped arrangement.
By the technology, the joint of the embedded end and the extending end is arc-shaped, so that when the supporting plate is subjected to external force, the external force can be dispersed along the arc-shaped surface, the damage of the supporting plate caused by stress concentration is avoided,
preferably, the supporting plate is rotatably connected with a plurality of pulleys; when the screening mother board is set up in the backup pad, the screening mother board supports and leans on in the periphery wall of a plurality of pulleys.
Through above-mentioned technique, the periphery wall of setting up in a plurality of pulleys of screening mother board reduces the frictional force between screening mother board and the backup pad for more laborsaving setting up in the backup pad or taking off the screening mother board of testing personnel.
Preferably, the supporting plate is fixedly connected with a handle which is convenient for a person to pull the supporting plate by hand.
Through above-mentioned technique, the handle offers people's hand to let the hand space for detection personnel can install and dismantle the backup pad through the handle application of force.
Preferably, hold the cavity wall and set up the heating tank that the intercommunication held the cavity, the heating member sets up in the heating tank, it is used for carrying out the fan that diffuses with heating member radiant heat still to be provided with in the cavity to hold, the fan sets up in the heating tank.
Through the above-mentioned technique, the fan passes through the rotation of flabellum, and the heat that will add the heat member radiation carries out quick diffusion, avoids the heat to concentrate, leads to being close to the screening mother board of adding the heat member and keeping away from the temperature production difference that the screening mother board of adding the heat member was located, and then leads to appearing the inaccurate condition of testing result.
Preferably, a protecting piece for protecting the fan and the heating element is arranged at the notch of the heating groove, and the protecting piece comprises a protecting ring which can be detachably connected with the wall of the accommodating cavity and a protecting net which is fixedly connected with the protecting ring.
Through above-mentioned technique, the protection piece sets up in heating notch department, prevents that the foreign matter from falling into the heating inslot, and protection fan and heating member do not receive destruction, and the guard net that the protection piece set up does not influence the transmission of heating member radiant heat to holding in the cavity.
Preferably, the protection ring is fixedly connected with a connecting lug, a connecting groove used for being matched with the connecting lug is formed in the groove wall of the heating groove, and the connecting lug is in interference fit with the connecting groove.
Through the technology, the connecting lug of the protection ring is embedded into the connecting groove, so that the protection piece can be detachably connected to the wall of the heating groove, and the connecting groove is in interference fit with the connecting lug, so that the protection piece is firmly connected to the wall of the accommodating cavity wall, and the protection piece is prevented from moving under the action of external force.
Preferably, the capacitor of the screening daughter board is connected in series with a resistor.
Through the technology, when voltage is applied or released to the capacitor on the screening daughter board, the resistor limits the current of the capacitor in the charging and discharging process, and overcurrent breakdown failure is prevented; meanwhile, when one or more capacitance parts on the screening daughter board fail due to internal defects, the circuit is in a short-circuit state, the current in the circuit is increased instantly at the moment, the situation that the screening daughter board is burnt is possibly caused, the series resistor can effectively limit the current to enable the whole daughter board to continue to work, and double protection is provided for screening of the capacitor by matching with the fuse.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the supporting rod is provided with a plurality of mounting grooves, the supporting plate is embedded into the mounting grooves, the supporting plate can be detachably connected to the supporting rod, bolt connection is replaced, the problem that the bolt is low in strength due to high-temperature oxidation of the bolt is solved, and the bolt is twisted off when the bolt is rotated is solved;
2. the capacitor of the screening daughter board is connected in series with a resistor, and the resistor and the fuse are matched to form double protection for the capacitor. When voltage is applied or released to the capacitor on the screening daughter board, the resistor limits the current of the capacitor in the charging and discharging process, so that overcurrent breakdown failure is prevented; meanwhile, when one or more capacitors on the screening daughter board fail, the capacitor is in a short-circuit state, the current in the circuit is increased instantly at the moment, the situation that the screening daughter board is burnt is possibly caused, and the series resistor can effectively limit the current to enable the whole daughter board to continue to work. When the capacitor and the resistor in the same path fail at the same time, the fuse is fused, and the fuse plays a role in protecting the printed board from being burnt.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is a schematic diagram of a screening motherboard cooperating with a screening daughter card according to an embodiment of the present application;
FIG. 3 is a schematic view of a support plate according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a heating element and a fan according to an embodiment of the present application.
Description of reference numerals: 1. an oven; 11. a receiving cavity; 12. a support bar; 121. mounting grooves; 13. a support plate; 131. an embedded end; 132. an extension end; 133. a pulley; 134. a handle; 14. a heating member; 15. a fan; 16. a protective member; 161. a guard ring; 162. a protection net; 2. screening a mother board; 21. screening daughter cards; 22. a capacitor; 23. a resistor; 24. a fuse; 25. and (4) a joint.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a device suitable for electrical aging of a large-capacitance value chip type multilayer ceramic dielectric capacitor. Referring to fig. 1, the oven includes an oven 1, a plurality of screening motherboards 2 placed in the oven 1, a plurality of screening daughter cards 21 connected to the screening motherboards 2, a plurality of capacitors 22 connected to the screening daughter cards 21, a power supply connected to the oven 1 and used for supplying current to the screening motherboards 2, and heating members 14 disposed in the oven 1 and used for heating the screening motherboards 2.
Referring to fig. 1 and 2, a plurality of capacitors 22 are connected in parallel to the screening daughter card 21, a plurality of screening daughter cards 21 are connected in parallel to the screening motherboard 2, a cavity of the oven 1 for accommodating the screening motherboard 2 is referred to as an accommodating cavity 11, the power supply and the heating element 14 are also arranged in the accommodating cavity 11, the screening motherboard 2 is provided with a plurality of connectors 25 for connecting with the power supply, one or more screening daughter cards 21 on the screening motherboard 2 can be selectively tested, the screening motherboard 2 is connected with the power supply to enable each capacitor 22 to be in a twice rated voltage detection environment, the heating element 14 is opened to enable the heating element 14 to provide an upper limit temperature environment for the capacitor 22, and enable the capacitor 22 to bear 96 hours, the detection mode is referred to as high temperature aging screening, the detection principle is to accelerate aging of defective capacitors 22, and normal capacitors 22 are not affected.
Typically, the capacitor 22 is connected in series with a fuse 24, and the fuse 24 is blown, indicating that the capacitor 22 is broken, i.e., a defect, because a plurality of capacitors 22 are connected in parallel, one of the capacitors 22 fails, and the testing of the other capacitors 22 is not affected.
In this embodiment, each capacitor 22 is connected in series with a resistor 23 and a fuse 24, wherein the resistor 23 is a metal film resistor, the metal film resistor has high precision, stable performance, good heat resistance, and is suitable for the voltage stabilization requirement of the circuit, the current limiting of the circuit through the metal film resistor avoids the occurrence of the circuit short circuit to cause the transient current increase, the fuse 24 adopts a fast fuse, so that the circuit short circuit can be fused fast, and the screening daughter card 21 is prevented from being burnt under the impact of a large current.
The metal film resistor is matched with the fast fuse to form double protection, so that the impact current is effectively limited, and the stability of the capacitor 22 during the electric aging process is improved.
Referring to fig. 1 and 3, a plurality of support rods 12 and a plurality of support plates 13 detachably connected to the support rods 12 are fixedly connected to the accommodating cavity 11, the support rods 12 extend in the vertical direction, a plurality of mounting grooves 121 are formed in the support rods 12, a part of the support plates 13 is embedded into the mounting grooves 121, the other part of the support plates extends out of the mounting grooves 121, two support plates 12 are matched with each other in pairs to connect one support plate 13, two support plates 13 located on the same level are matched with each other to set up the screening mother plate 2, and the screening mother plate 2 is set up at the part of the support plates 13 extending out of the mounting grooves 121.
The backup pad 13 realizes the connection dismantled of backup pad 13 through the inlay card in the mounting groove 121 that bracing piece 12 was seted up, has replaced bolted connection, has solved bolt high temperature oxidation and has caused bolt intensity low, makes the bolt take place by the condition of twisting off when rotating the bolt.
Will the backup pad 13 imbeds the one end of mounting groove 121 is called built-in end 131, will backup pad 13 stretches out the one end of mounting groove 121 is called to stretch out end 132, and built-in end 131 with stretch out end 132 and be an organic whole and set up, and built-in end 131 with stretch out end 132 mutually perpendicular, backup pad 13 is the L type along its length extending direction's cross-section, wherein built-in end 131 is the arc setting with the junction that stretches out end 132, compares in being the right angle setting, and the junction is the arc and can effectively disperse stress, avoids stress concentration to cause the damage of backup pad 13.
One end of the supporting plate 13 along the length direction is fixedly connected with a handle 134, when the supporting plate 13 needs to be periodically repaired and replaced, the hand of a user can take the supporting plate 13 down from the mounting groove 121 through a hand-letting space provided by the handle 134.
Referring to fig. 1 and 4, a heating groove has been seted up to the chamber wall that holds cavity 11, install heating member 14 in the heating groove, heating member 14 specifically comprises a plurality of heater strips, heating member 14 heats and holds cavity 11, make the temperature that holds in the cavity 11 reach preset temperature, wherein, the heating groove is seted up in the below that holds cavity 11, in order to avoid being higher than the screening mother board 2 who keeps away from heating member 14 near the temperature of the screening mother board 2 of heating member 14, the top of heater strip still is provided with fan 15, fan 15 also is located the heating groove, fan 15 diffuses the temperature that the heater strip radiated, make the air that holds in the cavity 11 flow rapidly, and then make the temperature that holds in the cavity 11 tend to unanimity, reduce the error that detects.
Since the heating wire and the fan 15 are located below the accommodating cavity 11, in order to prevent some large impurities from falling into the heating tank and causing damage to the heating wire and the fan 15, a protection member 16 is arranged at the notch of the heating tank, the protection member 16 is used for closing the heating tank, the protection member 16 comprises a protection ring 161 and a protection net 162 fixedly connected to the protection ring 161, and the protection net 162 is arranged so as not to influence the heat radiation of the heating wire.
The protection ring 161 is fixedly connected with a connection projection, a connection groove for matching with the connection projection is formed on the wall of the heating groove, and the connection projection is in interference fit with the connection groove, so that the protection member 16 is firmly connected to the wall of the accommodating cavity 11, the protection member 16 is prevented from moving under the action of external force, and the connection projection has certain elastic deformation.
The implementation principle of the device suitable for the electric aging of the large-capacitance value chip type multilayer ceramic dielectric capacitor is as follows: the inspection personnel install a plurality of capacitors 22 on the screening daughter board in parallel, and every capacitor 22 is established ties and is had quick fuse and metal film resistance, has set up duplicate protection for the test of capacitor 22, installs a plurality of screening daughter boards on screening mother board 2 again, sets up screening mother board 2 on backup pad 13 at last, and switch on. The power supply and the heating wires are turned on, each capacitor 22 is in a detection environment with twice rated voltage and upper limit temperature, when one of the quick fuse wires is fused, the metal film resistor connected in series with the quick fuse wire is failed, and the capacitor 22 connected in series with the quick fuse wire is a defective product.
Wherein, backup pad 13 realizes backup pad 13 releasable connection in bracing piece 12 through embedding bracing piece 12's mounting groove 121, has replaced bolted connection, has solved bolt high temperature oxidation and has caused bolt intensity low, makes the bolt take place by the condition of twisting off when rotating the bolt.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a device suitable for big appearance value piece formula multilayer ceramic capacitor electricity smelts always, includes oven (1), a plurality of screening mother board (2) of placing in oven (1), a plurality of connection are in screening daughter card (21) of screening mother board (2), a plurality of capacitor (22) of connecting in screening daughter card (21), set up in oven (1) and be used for heating member (14) of screening mother board (2), its characterized in that: the cavity that is used for placing screening mother board (2) in oven (1) is called and holds cavity (11), be provided with in holding cavity (11) and connect in bracing piece (12), the detachable connection who holds cavity (11) chamber wall and be used for supporting backup pad (13) of screening mother board (2) bracing piece (12), a plurality of mounting grooves (121) that are used for inlaying backup pad (13) are seted up in bracing piece (12), backup pad (13) some stretches out mounting groove (121), backup pad (13) set up in backup pad (13) stretches out the part of mounting groove (121).
2. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 1, wherein: will backup pad (13) embedding the one end of mounting groove (121) is called the built-in end (131), will backup pad (13) stretch out the one end of mounting groove (121) is called and stretches out end (132), the built-in end with the junction that stretches out end (132) is the arc setting.
3. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 1, wherein: the supporting plate (13) is rotatably connected with a plurality of pulleys (133); when the screening mother plate (2) is lapped on the support plate (13), the screening mother plate (2) is abutted against the peripheral walls of the plurality of pulleys (133).
4. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 1, wherein: the supporting plate (13) is fixedly connected with a handle (134) which is convenient for a human hand to pull the supporting plate (13).
5. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 1, wherein: hold cavity (11) chamber wall and set up the heating tank that the intercommunication held cavity (11), heating member (14) set up in heating tank, still be provided with in holding cavity (11) and be used for carrying out fan (15) that spread heating member (14) radiant heat, fan (15) set up in heating tank.
6. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 5, wherein: the protective piece (16) used for protecting the fan (15) and the heating piece (14) is arranged at the notch of the heating groove, and the protective piece (16) comprises a protective ring (161) which can be detachably connected to the wall of the accommodating cavity and a protective net (162) which is fixedly connected to the protective ring (161).
7. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 6, wherein: the protection ring (161) is fixedly connected with a connecting lug, a connecting groove used for being matched with the connecting lug is formed in the groove wall of the heating groove, and the connecting lug is in interference fit with the connecting groove.
8. The device suitable for the electric aging of the large-capacity chip multilayer ceramic capacitor as claimed in claim 1, wherein: the capacitor (22) of the screening daughter card is connected with a resistor (23) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121024984.9U CN214750630U (en) | 2021-05-13 | 2021-05-13 | Device suitable for electricity of big appearance value piece formula multilayer ceramic dielectric capacitor smelts always |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121024984.9U CN214750630U (en) | 2021-05-13 | 2021-05-13 | Device suitable for electricity of big appearance value piece formula multilayer ceramic dielectric capacitor smelts always |
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| Publication Number | Publication Date |
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| CN214750630U true CN214750630U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121024984.9U Active CN214750630U (en) | 2021-05-13 | 2021-05-13 | Device suitable for electricity of big appearance value piece formula multilayer ceramic dielectric capacitor smelts always |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839401A (en) * | 2022-03-12 | 2022-08-02 | 江苏宝浦莱半导体有限公司 | High-density arrangement aging board of service life test experiment golden finger plug structure with acceleration |
-
2021
- 2021-05-13 CN CN202121024984.9U patent/CN214750630U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839401A (en) * | 2022-03-12 | 2022-08-02 | 江苏宝浦莱半导体有限公司 | High-density arrangement aging board of service life test experiment golden finger plug structure with acceleration |
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