JP5537898B2 - ELECTRONIC COMPONENT MODULE, ELECTRONIC DEVICE HAVING THE SAME, AND METHOD FOR PRODUCING ELECTRONIC COMPONENT MODULE - Google Patents

Description

  The present invention relates to an electronic component module, an electronic device including the electronic component module, and a method for manufacturing the electronic component module.

  2. Description of the Related Art Conventionally, electronic devices such as an inverter power supply device include an electronic circuit configured by various electronic components 101 and 102 such as bare chips and electrolytic capacitors as shown in FIGS. 6 and 7, for example (see Patent Document 1). In this electronic apparatus, an electronic component 101 such as a bare chip that generates a large amount of heat is housed in a case 103, and an electrolytic capacitor (electronic component) 102 that is weak against heat is fixed in a state of protruding to the outside of the case 103. Yes. In addition, by disposing the electrolytic capacitor 102 in this way, the electronic device is also downsized (particularly thinned).

Further, this electronic device is configured such that the electrolytic capacitor 102 is fixed to the support member 104 to form a capacitor module (electronic component module) 105 and then the capacitor module 105 is mounted on the case 103. Thereby, the plurality of electrolytic capacitors 102 can be easily attached to the case 103. More specifically, the support member 104 is formed with an insertion hole 106 through which a plurality of electrolytic capacitors 102 are individually inserted. The electrolytic capacitor 102 is liquid-tight with respect to the support member 104 by, for example, forming the support member 104 with a grommet so that no gap is generated between the insertion hole 106 and the electrolytic capacitor 102 inserted through the insertion hole 106. Is retained. Further, in this electronic device, the lead electrode 107 of the electrolytic capacitor 102 and the wiring substrate 109 on which the electrolytic capacitor 102 is mounted are disposed inside the case 103 and sealed with a resin 108 filled in the case 103.
In the electronic apparatus configured as described above, moisture or the like does not enter the case 103 through the insertion hole 106 of the support member 104 and reach the wiring substrate 109, and the electrical capacitor 102 is electrically short-circuited by moisture or the like. Is preventing. In addition, since the electrolytic capacitor 102 and the wiring substrate 109 are integrally fixed by the resin, the electrolytic capacitor 102 does not vibrate with respect to the wiring substrate 109. As a result, the electrical connection between the electrolytic capacitor 102 and the wiring substrate 109 is achieved. Reliability has been obtained.

JP 2007-281127 A

By the way, in this type of electronic apparatus, it is necessary to change the number and size of the electrolytic capacitors 102 according to the specifications.
On the other hand, in the conventional capacitor module 105, it is necessary to appropriately change the number and size of the insertion holes 106 formed in the support member 104 in accordance with the number and size of the electrolytic capacitor 102. Thus, it is necessary to manufacture the support member 104 separately. That is, the conventional capacitor module 105 has a problem of low versatility.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide an electronic component module capable of improving versatility, an electronic device including the electronic component module, and a method for manufacturing the electronic component module. To do.

In order to solve this problem, an electronic component module of the present invention includes a capacitor main body and a lead electrode extending from one end of the capacitor main body, and an excessive end of the capacitor main body is formed on the end surface of the other end of the capacitor main body. An electronic component module is provided with an electrolytic capacitor in which an explosion-proof valve for preventing an increase in internal pressure is formed, and is fixed to a body unit incorporating an electronic circuit to electrically connect the electrolytic capacitor to the electronic circuit, A cylindrical housing case that has openings at both ends and can accommodate a plurality of the electrolytic capacitors; and the electrolytic capacitor is mounted on one main surface so that the electrolytic capacitors are electrically connected, and the electrolytic A wiring board that closes one opening of the housing case in a state where the capacitor is housed in the housing case, and the housing case. Sealing at least said one main surface in a scan, and a sealing resin is set so as not to interfere with the normal operation of the explosion-proof valve with fixing the electrolytic capacitor to said accommodating case, the electrolyte The capacitor is mounted on one main surface of the wiring substrate such that one end side of the capacitor body faces one main surface of the wiring substrate, and the electrolytic capacitor mounted on the wiring substrate is the capacitor The main body is inserted from one opening of the housing case so that the end surface on the other end side faces the outside from the other opening of the housing case.

According to the electronic component module of the present invention, the housing case is formed in a cylindrical shape into which an arbitrary number or size of electrolytic capacitors can be collectively inserted from the same opening (one opening). Even if the size or number of electrolytic capacitors to be connected to the circuit changes, the same housing case can be used. If the mounting structure of the electrolytic capacitor to the wiring board is the same, it is not necessary to change the electrical connection structure of the wiring board to the electrolytic capacitor even if the size and number of electrolytic capacitors are changed. On the other hand, any size and number of electrolytic capacitors can be mounted.
From the above, the versatility of the electronic component module can be improved.

Further, according to this electronic component module, since one main surface of the wiring board is sealed with the sealing resin, even if moisture or the like enters the housing case from the other opening, it does not reach the wiring board. Therefore, an electrical short circuit of the electrolytic capacitor can be prevented. In addition, any number or size of electrolytic capacitors housed in the housing case are fixed together by the sealing resin, so that the electrolytic capacitors can be prevented from vibrating with respect to the housing case or the wiring board. As a result, the reliability of the electrical connection between the electrolytic capacitor and the wiring board is improved.
From the above, it is possible to provide an electronic component module with high electrical reliability.

In the electronic component module, the entire electrolytic capacitor is sealed with the sealing resin, and the thickness of the sealing resin that covers the explosion-proof valve is set so as not to prevent normal operation of the explosion-proof valve. it is more preferable are.
In this case, it is possible to prevent the above-described moisture and the like from entering the electrolytic capacitor.

The electronic device of the present invention includes the electronic component module and the main unit in which the electronic circuit is built, and a connection for electrically connecting the electrolytic capacitor to the electronic circuit on the other main surface of the wiring board. A terminal is provided, and the connection terminal is electrically connected to the electronic circuit in a state where the electronic component module is fixed to the main body unit.

An electrolytic capacitor comprising a capacitor body and a lead electrode extending from one end portion of the capacitor body, and an explosion-proof valve for preventing an excessive increase in internal pressure of the capacitor body is formed on an end surface on the other end side of the capacitor body. And a method of manufacturing an electronic component module for electrically connecting the electrolytic capacitor to the electronic circuit, the electrical capacitor being electrically connected to a wiring board. In addition, a mounting step of mounting the electrolytic capacitor on one main surface of the wiring board so that one end side of the capacitor body faces one main surface of the wiring board, and openings at both ends are provided. to the electrolytic capacitor to a plurality acquisition possible tubular housing case, the other end side of the end face the housing Ke of the capacitor body An accommodating step of inserting and accommodating the electrolytic capacitor from one opening of the housing case so as to face outward from the other opening of the housing, and closing the one opening by the wiring board; By pouring resin from the other opening of the housing case, at least the one main surface is sealed in the housing case, the electrolytic capacitor is fixed to the housing case, and the explosion-proof valve operates normally. And a sealing step of forming a sealing resin that is set so as not to hinder .

According to the above manufacturing method, by carrying out the housing step after the mounting step, the electrolytic capacitor can be housed in the housing case, and at the same time, one opening of the housing case can be closed by the wiring board. Further, by performing the sealing step after the housing step, it is possible to prevent the resin poured into the housing case from flowing out from the one opening side. Therefore, the electronic component module can be easily manufactured, and the manufacturing efficiency can be improved.

Furthermore, since the resin is poured from the other opening of the housing case in the sealing step, the thickness of the sealing resin from one main surface of the wiring board can be easily adjusted. This effect is particularly effective when the electrolytic capacitor is an electrolytic capacitor. In other words, in an electrolytic capacitor, an explosion-proof valve for preventing an excessive increase in internal pressure of the electrolytic capacitor is often formed at the end opposite to the wiring board side. Therefore, when the entire electrolytic capacitor is sealed with a sealing resin Therefore, it is necessary to appropriately adjust the thickness of the sealing resin that covers the explosion-proof valve so that the explosion-proof valve operates normally. Therefore, if the resin is poured as described above, the thickness of the sealing resin covering the explosion-proof valve can be easily adjusted.

  According to the present invention, even if the number and size of electronic components required for an electronic device are changed, the same housing case and wiring board can be used, so that the versatility of the electronic component module can be improved.

It is a perspective view which shows the electronic device formed by fixing the capacitor | condenser module which is one Embodiment of this invention to a main body unit. It is a perspective view which shows the state which looked at the capacitor | condenser module which is one Embodiment of this invention from the other opening part side of the storage case. It is AA arrow sectional drawing of FIG. FIG. 2 is an exploded perspective view of the capacitor module of FIG. 1 as seen from the other opening side before the electrolytic capacitor is housed in the housing case. FIG. 2 is an exploded perspective view of the capacitor module of FIG. 1 as seen from one opening side before the electrolytic capacitor is housed in the housing case. It is a perspective view which shows an example of the conventional electronic device. It is sectional drawing which shows the principal part of the electronic device of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 5, a capacitor module (electronic component module) 10 according to this embodiment constitutes an electronic apparatus 1 together with the main unit 5 by being fixed to the outside of the main unit 5 containing an electronic circuit. To do. The main unit 5 is configured by housing a circuit board 7 and a plurality of electronic components constituting an electronic circuit in a case 9 as in the conventional case.
The capacitor module 10 includes a plurality of electrolytic capacitors (electronic components) 11, a housing case 13 that houses the electrolytic capacitor 11, a wiring board 15 that electrically connects the electrolytic capacitor 11 to the electronic circuit of the main unit 5, and a housing case. 13 includes a sealing resin 17 for fixing the electrolytic capacitor 11.

  Each electrolytic capacitor 11 is, for example, an existing aluminum electrolytic capacitor, and includes a capacitor body 21 formed in a columnar shape and a lead electrode 22 extending from one end portion 21A in the longitudinal direction. Further, an explosion-proof valve (not shown) for preventing an excessive increase in internal pressure of the electrolytic capacitor 11 is formed on the end surface of the capacitor body 21 on the other end 21B side. In other words, the explosion-proof valve bursts when the internal pressure of the electrolytic capacitor 11 exceeds a predetermined value set in advance.

The housing case 13 is formed in a cylindrical shape having openings 13A and 13B at both ends, that is, has a through hole 13C. In the housing case 13 in the illustrated example, the through-hole 13C is formed in a long and narrow rectangular shape so that the electrolytic capacitors 11 in the illustrated example can be stored in a line.
Further, an engagement groove 13 </ b> D for fixing the capacitor module 10 to the case 9 of the main unit 5 is also formed on the outer periphery of the housing case 13 on the one opening 13 </ b> A side. That is, the capacitor module 10 is fixed to the main unit 5 by engaging the engaging groove 13 </ b> D with the engaging protrusion that forms the edge of the opening formed in a part of the side wall of the case 9 of the main unit 5. be able to.

A plurality of electrolytic capacitors 11 are mounted on one main surface 15 </ b> A of the wiring board 15.
More specifically, the wiring board 15 is formed in a plurality of via holes (not shown) penetrating in the thickness direction and the other main surface 15B to electrically connect the electrolytic capacitor 11 to the electronic circuit of the main unit 5. Connecting terminals 23 and electrical wiring (not shown) for electrically connecting the via holes and the connecting terminals 23 to each other. Each lead electrode 22 of the electrolytic capacitor 11 is inserted into each via hole from one main surface 15A side of the wiring board 15 and is joined to the electric wiring by solder or the like. Thereby, the lead electrode 22 is electrically connected to the wiring board 15. Note that the plurality of electrolytic capacitors 11 are electrically connected in parallel by electrical wiring of the wiring board 15 in a state of being mounted on the wiring board 15.

The wiring board 15 is bonded and fixed to the one opening 13A side of the housing case 13 with an adhesive or the like so that one main surface 15A faces the housing case 13. In this fixed state, the wiring board 15 closes one opening 13 </ b> A of the housing case 13. That is, the wiring board 15 has a size and shape that closes one opening 13 </ b> A of the housing case 13. In other words, the area of one main surface 15A of the wiring board 15 is set larger than the opening area of the one opening 13A of the housing case 13.
In a state where the wiring board 15 is fixed to the housing case 13, the plurality of electrolytic capacitors 11 mounted on the wiring board 15 are housed in the housing case 13. In this accommodated state, the end surface on the other end 21B side of the electrolytic capacitor 11 including the explosion-proof valve faces outward from the other opening 13B of the accommodating case 13. The other end 21 </ b> B of the electrolytic capacitor 11 does not protrude from the other opening 13 </ b> B of the housing case 13.

The sealing resin 17 is formed in the housing case 13 so as to seal one main surface 15A of the wiring board 15 and the entire electrolytic capacitor 11, so that the electrolytic capacitor 11 is connected to the housing case 13 and the wiring board. 15 is fixed. That is, in the present embodiment, the end surface on the other end 21 </ b> B side of the electrolytic capacitor 11 including the explosion-proof valve is covered with the sealing resin 17. Here, the hardness of the sealing resin 17 and the thickness T1 of the sealing resin 17 covering the explosion-proof valve are adjusted so as not to prevent the normal operation of the explosion-proof valve. For example, when the material of the sealing resin 17 is soft, the thickness T1 of the sealing resin 17 covering the explosion-proof valve may be increased, but when the material of the sealing resin 17 is hard, the explosion-proof of the electrolytic capacitor 11 is obtained. It is necessary to adjust the thickness T1 of the sealing resin 17 to be small so as not to impair the function.
In the illustrated example, the sealing resin 17 is located inside the housing case 13 with respect to the other opening 13B. However, the relationship between the above-described explosion-proof valve and the hardness of the sealing resin 17, and the other opening. Depending on the position of the end surface on the other end 21B side of the electrolytic capacitor 11 with respect to the portion 13B, the entire housing case 13 may be filled, for example.

Next, a method for manufacturing the capacitor module 10 having the above configuration will be described.
When manufacturing the capacitor module 10, first, the electrolytic capacitor 11 is mounted on one main surface 15 </ b> A of the wiring board 15 so that the lead electrode 22 of the electrolytic capacitor 11 is electrically connected to the electric wiring of the wiring board 15. (Mounting process). In this step, after the lead electrode 22 of the electrolytic capacitor 11 is inserted into the via hole from the one main surface 15A side of the wiring board 15, the lead electrode 22 is connected to the wiring board 15 by soldering or welding on the other main surface 15B side. What is necessary is just to join to 15 electric wiring.
Next, as shown in FIGS. 4 and 5, the electrolytic capacitor 11 is inserted into and accommodated in the cylindrical housing case 13 from one opening 13 </ b> A of the housing case 13, and one opening is formed by the wiring board 15. 13A is closed (accommodating step). In this step, the wiring board 15 may be bonded and fixed to the one opening 13 </ b> A side of the housing case 13 with an adhesive or the like so that there is no gap between the wiring board 15 and the housing case 13.

Finally, the molten resin is poured into the housing case 13 from the other opening 13B, thereby sealing the entire electrolytic capacitor 11 and one main surface 15A of the wiring board 15 in the housing case 13 as shown in FIG. The sealing resin 17 for fixing the electrolytic capacitor 11 to the housing case 13 is formed (sealing process). Thereby, manufacture of the capacitor module 10 is completed.
In the sealing step, since the resin is poured from the other opening 13B of the housing case 13, the thickness of the sealing resin 17 from the one main surface 15A can be easily adjusted. In particular, in the sealing process, it is necessary to appropriately adjust the thickness T1 of the sealing resin 17 covering the explosion-proof valve while considering the hardness of the sealing resin 17 so as not to hinder the operation of the explosion-proof valve. By pouring the resin from the other opening 13B of the housing case 13, the thickness T1 of the sealing resin 17 covering the explosion-proof valve can be easily adjusted.

  In a state where the capacitor module 10 is fixed to the main unit 5, the connection terminal 23 of the wiring board 15 located in the main unit 5 is electrically connected to the electronic circuit of the main unit 5. After this fixing, for example, resin may be poured into the case 9 of the main unit 5 to seal the other main surface 15B of the wiring board 15 and the circuit board 7 or the like. Depending on the environment, for example, resin sealing may not be performed.

  As described above, according to the capacitor module 10 according to the above-described embodiment, the housing case 13 has a cylindrical shape in which any number or size of the electrolytic capacitors 11 can be collectively inserted from the same opening (one opening 13A). Thus, even if the size and number of electrolytic capacitors 11 to be connected to the electronic circuit of the main unit 5 are changed, the same housing case 13 can be used. If it demonstrates concretely, the number of the electrolytic capacitors 11 can be reduced rather than the thing of the example of illustration. When the number of electrolytic capacitors 11 to be mounted on the wiring board 15 is reduced, if the via hole of the wiring board 15 that is not used for mounting the electrolytic capacitor 11 is closed with an adhesive tape or the like, the resin is removed from the via hole in the sealing process. Leakage can be prevented.

Further, if the arrangement structure of the lead electrode 22 in each electrolytic capacitor 11 (the mounting structure of the electrolytic capacitor 11 with respect to the wiring substrate 15) is the same, there is no need to change the electrical connection structure of the wiring substrate 15 with respect to the electrolytic capacitor 11. Any number and size of electrolytic capacitors 11 can be mounted on the same wiring board 15. More specifically, if the distance between the pair of lead electrodes 22 provided in each electrolytic capacitor 11 is the same, there is no need to change the distance between via holes in the wiring board 15. It is possible to mount an electrolytic capacitor 11 of any size and number.
That is, according to the capacitor module 10, the same accommodation case 13 and wiring board 15 can be used even if the number and size of electronic components required for the electronic device 1 are changed, so that the versatility of the capacitor module 10 is improved. be able to.

Further, according to the capacitor module 10, the entire electrolytic capacitor 11 including the lead electrode 22 and the one main surface 15 </ b> A of the wiring board 15 are sealed with the sealing resin 17, so that the other opening of the housing case 13 can be obtained. Even if moisture or the like enters the housing case 13 from the portion 13B, it does not reach the lead electrode 22, the wiring board 15, or the capacitor body 21, so that an electrical short circuit of the electrolytic capacitor 11 can be prevented.
In addition, since any number or size of the electrolytic capacitors 11 collectively accommodated in the accommodation case 13 are fixed together by the sealing resin 17, the electrolytic capacitor 11 is attached to the accommodation case 13 and the wiring substrate 15. As a result, the reliability of electrical connection between the electrolytic capacitor 11 and the wiring board 15 is improved.
From the above, it becomes possible to provide the capacitor module 10 with high electrical reliability.

  Further, according to the method for manufacturing the capacitor module 10, the electrolytic capacitor 11 is accommodated in the accommodating case 13 by carrying out the accommodating step after the mounting step, and at the same time, the one opening 13 </ b> A of the accommodating case 13 by the wiring substrate 15. Can be occluded. Further, by performing the sealing step after the accommodating step, it is possible to prevent the resin poured into the accommodating case 13 from flowing out from the one opening 13A side. Therefore, the capacitor module 10 can be easily manufactured, and the manufacturing efficiency can be improved.

As mentioned above, although one Embodiment of this invention was described, the technical scope of this invention is not limited to this, It can change suitably in the range which does not deviate from the technical idea of this invention.
That is, the through-hole 13C of the housing case 13 is not limited to be formed in a rectangular shape with a long and narrow cross section so that the electrolytic capacitors 11 in the illustrated example can be housed in a row, and may be any arbitrary shape such as a regular polygon or a circle. It may be formed in a cross-sectional shape.
When the cross-sectional shape of the through-hole 13C of the housing case 13 is a regular polygon, a circle, or the like, only one electrolytic capacitor 11 having a large size (diameter dimension) can be accommodated and the electrolytic capacitor 11 having a small size can be accommodated. If so, it can be accommodated. Therefore, in the capacitor module 10 according to the present invention, it is sufficient that at least the housing case 13 is formed in a cylindrical shape capable of housing one or more electrolytic capacitors 11.

  Further, the arrangement of the electrolytic capacitors 11 in the housing case 13 is not limited to being arranged in a line as in the above-described embodiment, but may be in an arbitrary arrangement state such as a matrix shape or a staggered shape. For example, when accommodating electrolytic capacitors having a smaller diameter than that of the above embodiment in the housing case 13 of the above embodiment, the electrolytic capacitors can be arranged in a plurality of rows.

  Furthermore, although the sealing resin 17 seals the entire electrolytic capacitor 11, it is sufficient that at least one main surface 15 </ b> A of the wiring substrate 15 is sealed and the electrolytic capacitor 11 is fixed to the housing case 13. That is, the sealing resin 17 may seal only the one end 21 </ b> A side of the electrolytic capacitor 11 without covering the end face on the other end 21 </ b> B side of the electrolytic capacitor 11 including the explosion-proof valve, for example. Even with such a configuration, an electrical short circuit of the electrolytic capacitor 11 due to moisture or the like, and vibration of the electrolytic capacitor 11 with respect to the housing case 13 or the wiring substrate 15 can be prevented.

The capacitor module 10 may include a lid member that closes the other opening 13B of the housing case 13, for example. In this configuration, for example, it is preferable to provide a gap between the lid member and the explosion-proof valve or to make the lid member thin so as not to hinder the operation of the explosion-proof valve. Further, the lid member may be attached to the housing case 13 so that the lid member is detached from the housing case 13 when the explosion-proof valve is activated and the internal pressure of the housing case 13 is increased. Further, the lid member may be configured to allow air to pass but not to pass moisture, for example. In these cases, it is possible to suppress an excessive increase in the internal pressure of the housing case 13 even when the explosion-proof valve operates.
When manufacturing the capacitor module 10 having this configuration, for example, after the resin is poured from the other opening 13B of the housing case 13 in the same manner as in the sealing step of the above embodiment, the other opening 13B is formed by the lid member. What is necessary is just to block.

  According to the capacitor module 10 having this configuration, the entire electrolytic capacitor 11 including the explosion-proof valve can be protected without covering the explosion-proof valve with the sealing resin 17. Further, similarly to the housing case 13, the same lid member can be used even if the number and size of the electrolytic capacitors 11 are changed. That is, the high versatility of the capacitor module 10 can be maintained even when the lid member is provided.

  In the above embodiment, the capacitor module 10 including the electrolytic capacitor 11 has been described. However, the electronic component module of the present invention is applied to a configuration including at least an arbitrary electronic component necessary for the electronic circuit of the main unit 5. Is possible. That is, not only the electrolytic capacitor 11 but also other electronic components such as a bare chip may be housed in the housing case 13.

1 Electronic device 5 Main unit 10 Capacitor module (electronic component module)
11 Electrolytic capacitors (electronic parts)
13 Housing case 13A One opening 13B Other opening 15 Wiring board 15A One main surface 15B Other main surface 17 Sealing resin 22 Lead electrode 23 Connection terminal

Claims (4)

An electrolytic capacitor comprising a capacitor body and a lead electrode extending from one end portion of the capacitor body, and an explosion-proof valve for preventing an excessive increase in internal pressure of the capacitor body is formed on an end surface on the other end side of the capacitor body. An electronic component module fixed to a main unit containing an electronic circuit and electrically connecting the electrolytic capacitor to the electronic circuit,
A cylindrical storage case that has openings at both ends and can store a plurality of the electrolytic capacitors;
The circuit board is mounted on one main surface so that the electrolytic capacitor is electrically connected, and closes one opening of the housing case in a state where the electrolytic capacitor is housed in the housing case When,
Sealing at least one of the main surfaces in the housing case, and fixing the electrolytic capacitor to the housing case and a sealing resin set so as not to prevent normal operation of the explosion-proof valve ,
The electrolytic capacitor is mounted on one main surface of the wiring board such that one end side of the capacitor body faces one main surface of the wiring board,
The electrolytic capacitor mounted on the wiring board is inserted from one opening of the housing case so that the end surface on the other end side of the capacitor body faces outward from the other opening of the housing case. An electronic component module characterized by being made. The entire electrolytic capacitor is sealed with the sealing resin ,
The electronic component module according to claim 1 , wherein a thickness of the sealing resin covering the explosion-proof valve is set so as not to prevent a normal operation of the explosion-proof valve . The electronic component module according to claim 1 or 2 , and the main unit containing the electronic circuit,
A connection terminal for electrically connecting the electrolytic capacitor to the electronic circuit is provided on the other main surface of the wiring board,
An electronic apparatus, wherein the connection terminal is electrically connected to the electronic circuit in a state where the electronic component module is fixed to the main unit. An electrolytic capacitor comprising a capacitor body and a lead electrode extending from one end portion of the capacitor body, and an explosion-proof valve for preventing an excessive increase in internal pressure of the capacitor body is formed on an end surface on the other end side of the capacitor body. A method of manufacturing an electronic component module that is fixed to a body unit that incorporates an electronic circuit and electrically connects the electrolytic capacitor to the electronic circuit,
The electrolytic capacitor is placed on one main surface of the wiring board so that the electrolytic capacitor is electrically connected to the wiring board and one end of the capacitor body faces one main surface of the wiring board. Mounting process to mount,
With respect to the cylindrical storage case having openings at both ends and capable of collecting a plurality of electrolytic capacitors, the end surface on the other end side of the capacitor body faces outward from the other opening of the storage case. The electrolytic capacitor is inserted from one opening of the housing case and housed, and the housing step of closing the one opening by the wiring board;
By pouring resin from the other opening of the housing case, at least the one main surface is sealed in the housing case, the electrolytic capacitor is fixed to the housing case, and the explosion-proof valve operates normally. And a sealing step of forming a sealing resin that is set so as not to interfere with the manufacturing process in order.

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