Electronic component housing case and power conversion device

Abstract

This electronic component housing case for housing an electronic component comprises: a case body that forms an internal space for housing the electronic component; and a weight portion that is provided on an inner wall of the case body to attenuate vibration of the case body. The weight portion includes a plurality of protruding portions arranged so as to be spaced apart from each other.

Description

Electronic component housing and power conversion device

[0001] The present invention relates to an electronic component housing and a power conversion device.

[0002] For example, Patent Document 1 discloses a housing having a case body and a cover attached to the case body. The housing disclosed in Patent Document 1 is capable of accommodating a circuit board inside. Patent Document 1 also discloses a structure in which a weight-increasing structural part is added to a flat cover. Patent Document 1 discloses that adding a weight-increasing structural part to the cover provides a vibration suppression effect.

[0003] Japanese Patent Application Laid-Open No. 2021-190563

[0004] The weight portion, which is a structural portion for increasing weight as disclosed in Patent Document 1, is formed in a block shape. When such a block-shaped weight portion is provided on the housing body, the rigidity of the housing body is increased. When the rigidity of the housing body is increased, the resonance frequency increases, and the housing body may resonate due to vehicle vibrations, etc., and generate abnormal noise. In other words, when a block-shaped weight portion is provided on the housing body, although a vibration damping effect due to the increased weight can be expected, the housing body is more likely to resonate.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an electronic component housing that can suppress an increase in the resonance frequency of the housing body while obtaining the vibration damping effect due to increased weight.

[0006] The present invention employs the following configuration as a means for solving the above problems.

[0007] A first aspect of the present invention is an electronic component housing housing for housing electronic components, comprising a housing main body that forms an internal space for housing the electronic components, and a weight portion provided on an inner wall of the housing main body to damp vibrations of the housing main body, wherein the weight portion is made up of a plurality of protrusions arranged at intervals from one another.

[0008] A second aspect of the present invention is a power conversion device including the electronic component for performing power conversion and the electronic component housing housing of the first aspect.

[0009] The present invention can enhance the damping effect of the housing body by using a weight portion. Furthermore, the present invention comprises a plurality of protrusions arranged at intervals from one another. This allows the housing body to flex so as to change the distance between the protrusions. Therefore, the present invention can prevent the weight portion from increasing the rigidity of the housing body, and can prevent the resonant frequency of the housing body from increasing. Therefore, the present invention can prevent the resonant frequency of the housing body from increasing while obtaining the vibration damping effect due to the increased weight.

[0010] FIG. 1 is a schematic configuration diagram of a vehicle on which a power conversion device according to a first embodiment of the present invention is mounted. FIG. 2 is a circuit diagram showing a schematic electrical configuration of a step-up / step-down converter and an inverter provided in the power conversion device according to the first embodiment of the present invention. FIG. 3 is an exploded perspective view showing a schematic structural configuration of the power conversion device according to the first embodiment of the present invention. FIG. 4 is a perspective view, seen from below, of an upper cover provided in the power conversion device according to the first embodiment of the present invention. FIG. 5 is a schematic cross-sectional view, including a rib, provided in a power conversion device according to a second embodiment of the present invention. FIG. 6 is a schematic cross-sectional view, including a rib, provided in a power conversion device according to a third embodiment of the present invention. FIG. 7 is a perspective view, seen from below, of an upper cover provided in a power conversion device according to a fourth embodiment of the present invention. FIG. 8 is a schematic cross-sectional view, seen from below, of an upper cover provided in a power conversion device according to a fifth embodiment of the present invention. FIG. 9 is a perspective view, seen from below, of an upper cover provided in a power conversion device according to a sixth embodiment of the present invention. FIG. 10 is a perspective view, seen from below, of an upper cover provided in a power conversion device according to a seventh embodiment of the present invention. FIG. 11 is a schematic bottom view of an upper cover provided in a power conversion device according to an eighth embodiment of the present invention.

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic component housing and a power converter according to the present invention will be described below with reference to the drawings.

[0012] First Embodiment Fig. 1 is a schematic diagram of a vehicle 100 equipped with a power conversion device 1 according to the present embodiment. The vehicle 100 is, for example, an electric vehicle or a hybrid vehicle. As shown in Fig. 1, the vehicle 100 includes, for example, a high-voltage battery HB, a low-voltage battery LB, a motor M, a generator G, and the power conversion device 1 according to the present embodiment.

[0013] The high-voltage battery HB is a secondary battery such as a lithium-ion battery, and outputs relatively high-voltage DC power of, for example, several hundred volts. This high-voltage battery HB is a battery that outputs drive power to be supplied to the motor M, and is a so-called drive battery. The low-voltage battery LB is a secondary battery such as a lead-acid battery, and outputs relatively low-voltage DC power of, for example, about 12 V. This low-voltage battery LB is a battery that outputs auxiliary power to be supplied to auxiliary devices (not shown), and is a so-called auxiliary device battery.

[0014] The motor M generates rotational power by receiving drive power from the high-voltage battery HB via the power conversion device 1. The rotational power generated by the motor M is transmitted to the drive wheels of the vehicle 100 via a transmission mechanism (not shown). The generator G generates electric power by receiving power from, for example, an external source. The electric power generated by the generator G is supplied to, for example, the high-voltage battery HB.

[0015] The power conversion device 1 of this embodiment is a device that performs power conversion. For example, the power conversion device 1 converts DC power to AC power, AC power to DC power, and voltage. Specifically, the power conversion device 1 of this embodiment boosts and converts drive power output from a high-voltage battery HB to AC and supplies the boosted drive power to a motor M. The power conversion device 1 of this embodiment also converts regenerative power output from the motor M to DC, reduces the voltage, and supplies the DC power to the high-voltage battery HB. The power conversion device 1 of this embodiment also converts power output from a generator G to DC and supplies the DC power to the high-voltage battery HB. The power conversion device 1 of this embodiment also reduces the voltage of the drive power output from the high-voltage battery HB to generate power for auxiliary devices and supplies the power to a low-voltage battery LB.

[0016] As shown in Fig. 1, the power conversion device 1 of this embodiment includes a step-up / step-down converter 2, an inverter 3, and a DC / DC converter 4. The step-up / step-down converter 2, the inverter 3, and the DC / DC converter 4 constitute a power conversion circuit H that performs power conversion. The step-up / step-down converter 2 boosts or lowers the voltage of power. For example, the step-up / step-down converter 2 boosts the drive power supplied from a high-voltage battery HB and outputs the boosted power to the inverter 3. The step-up / step-down converter 2 also lowers the regenerative power supplied from the inverter 3 and outputs the power to the high-voltage battery HB.

[0017] The inverter 3 converts DC power to AC power or AC power to DC power. For example, the inverter 3 converts DC driving power supplied from the step-up / step-down converter 2 into three-phase AC power and outputs it to the motor M. The inverter 3 also converts AC regenerative power supplied from the motor M into DC power and outputs it to the high-voltage battery HB. The inverter 3 also converts AC regenerative power supplied from the generator G into DC power and outputs it to the high-voltage battery HB.

[0018] The DC-DC converter 4 converts the drive power output from the high-voltage battery HB into DC power for the auxiliary devices by stepping down the voltage of the drive power.

[0019] Fig. 2 is a circuit diagram showing a schematic electrical configuration of the step-up / step-down converter 2 and the inverter 3. As shown in Fig. 2, the power conversion device 1 of this embodiment includes the step-up / step-down converter 2 and the inverter 3 connected to each other.

[0020] The buck-boost converter 2 includes one power device D, two capacitors C, and a reactor L. One of the two capacitors C (hereinafter referred to as the first capacitor C1) stores power before boosting when power is supplied from the high-voltage battery HB to the motor M. The other of the two capacitors C (hereinafter referred to as the second capacitor C2) stores power after boosting when power is supplied from the high-voltage battery HB to the motor M. Note that the first capacitor C1 and the second capacitor C2 are not limited to being formed with a single element. The first capacitor C1 may be formed with multiple elements, and the second capacitor C2 may be formed with multiple elements. Note that the buck-boost converter 2 may be an interleaved buck-boost converter.

[0021] The inverter 3 also includes six power devices D. Each power device D includes a power transistor. These power transistors have semiconductor elements and are mounted on an insulated circuit board. In this embodiment, one power device D includes two power transistors. However, a power device having a single power transistor may also be included. In this case, four power devices are provided in the step-up / step-down converter 2, and 12 power devices are provided in the inverter 3. For example, each power transistor includes a plurality of semiconductor elements formed of, for example, SiC (silicon carbide). The power transistors may also include semiconductor elements formed of other materials, such as Si (silicon) or GaN (gallium nitride).

[0022] The power conversion device 1 does not necessarily have to include the step-up / step-down converter 2. However, even in such a case, a smoothing capacitor (the second capacitor C2 in FIG. 2 ) is connected to the inverter 3. Furthermore, the power conversion device 1 of this embodiment does not necessarily have to be connected to the generator G. In such a case, the inverter 3 includes three power devices D connected to the motor M out of the six power devices D shown in FIG. 2 .

[0023] 3 is an exploded perspective view showing a schematic structural configuration of the power conversion device 1 of this embodiment. As shown in FIG. 3, the power conversion device 1 of this embodiment includes an intelligent power module 10, a main body case 11 (a housing for accommodating electronic components), a capacitor unit 12, a reactor unit 13, a DC-DC converter unit 14, and a connector unit 15.

[0024] In the following description, for convenience of explanation, the direction in which the DCDC converter unit 14 and the like are located relative to a partition wall 31a of a center plate 31 (described later) of the main body case 11 is referred to as "upward," and the direction in which the intelligent power module 10 is located relative to a partition wall 31a of a center plate 31 (described later) of the main body case 11 is referred to as "downward." However, the installation posture of the power conversion device 1 is not particularly limited.

[0025] The intelligent power module 10 includes a power module 20, a gate driver board 21, an ECU board 22, etc. The power module 20 includes a plurality of power devices D having semiconductor elements, a resin power module case that houses these power devices D, etc.

[0026] The gate driver board 21 is a board on which a gate driver that generates drive signals for the step-up / step-down converter 2 and the inverter 3 formed by the power devices D is provided. Such a gate driver board 21 is stacked on the power module 20. The ECU board 22 is a board on which an ECU (Electronic Control Unit) that controls the gate driver board 21 is provided. This ECU board 22 is stacked on the gate driver board 21. Note that the gate driver board 21 and ECU board 22 may be integrated.

[0027] Such an intelligent power module 10 includes a power device D that forms the step-up / step-down converter 2 and the inverter 3. In other words, the intelligent power module 10 forms at least a part of the step-up / step-down converter 2 and the inverter 3.

[0028] The main body case 11 is a case that houses the intelligent power module 10, the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, the connector unit 15, etc. The main body case 11 includes an upper cover 30, a center plate 31, a lower cover 32, and a weight portion 33. The upper cover 30 (cover-shaped container portion), the center plate 31, and the lower cover 32 constitute a housing main body 35 that forms an internal space K that houses electronic components. The upper cover 30, the center plate 31, and the lower cover 32 are formed so as to be separable in the vertical direction. In this embodiment, the electronic components are, for example, the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, and the connector unit 15.

[0029] The upper cover 30 is a portion that covers from above the DCDC converter unit 14 and the reactor unit 13, which are fixed from above to the center plate 31. In other words, the upper cover 30 is fastened to the center plate 31 via bolts or the like (not shown).

[0030] FIG. 4 is a perspective view of the upper cover 30 as viewed from below. As shown in FIG. 4, the upper cover 30 has a top wall portion 30a and a peripheral wall portion 30b that hangs down from the outer edge of the top wall portion 30a. In this embodiment, the upper cover 30 is rectangular when viewed from above. The dimension of the upper cover 30 in a first direction (hereinafter referred to as the longitudinal direction), which is a direction perpendicular to the up-down direction, is greater than the dimension in a second direction (hereinafter referred to as the lateral direction), which is perpendicular to the up-down direction and the longitudinal direction. Note that these longitudinal and lateral directions are directions along the lower surface 30c (inner wall) of the top wall portion 30a. Furthermore, the lower surface 30c of the top wall portion 30a is the inner wall of the main body case 11. In other words, these longitudinal and lateral directions are directions along the inner wall of the main body case 11.

[0031] 4, the upper cover 30 includes a reinforcing portion 30d that extends linearly along the longitudinal direction. The reinforcing portion 30d improves the rigidity of the upper cover 30. That is, the reinforcing portion 30d improves the rigidity of the main body case 11. The reinforcing portion 30d is formed so as to protrude downward from the lower surface 30c of the top wall portion 30a.

[0032] 3, the central plate 31 is a support plate located between the upper cover 30 and the lower cover 32. The central plate 31 includes a flat partition wall portion 31a and a surrounding wall portion 31b that is provided to surround the partition wall portion 31a from the sides. The partition wall portion 31a supports, for example, the intelligent power module 10, the capacitor unit 12, the reactor unit 13, and the DCDC converter unit 14.

[0033] In this embodiment, the reactor unit 13 and the DCDC converter unit 14 are disposed above the partition wall 31a. Also, in this embodiment, the intelligent power module 10 is disposed below the partition wall 31a. Also, in this embodiment, the capacitor unit 12 is provided so as to penetrate the partition wall 31a in the vertical direction. Therefore, the partition wall 31a is provided with an insertion opening 31c through which the capacitor unit 12 is inserted.

[0034] The intelligent power module 10, the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, and the connector unit 15 are fastened to bosses or the like provided on the partition wall portion 31a by bolts or the like (not shown).

[0035] A cooling flow path for guiding a coolant is provided inside the partition wall 31 a. By flowing the coolant through this cooling flow path, the partition wall 31 a functions as a cooling jacket, and the intelligent power module 10, the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, and the connector unit 15 are cooled.

[0036] The surrounding wall portion 31b is provided to surround the intelligent power module 10, the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, and the connector unit 15 from the sides. The surrounding wall portion 31b is connected to the edge of the partition wall portion 31a and is provided to protrude upward and downward from the partition wall portion 31a. The upper end of the surrounding wall portion 31b is abutted by the upper cover 30. The lower end of the surrounding wall portion 31b is abutted by the lower cover 32.

[0037] The lower cover 32 is a part that covers from below the intelligent power module 10 and the connector unit 15 that are fixed to the central plate 31 from below. The lower cover 32 also covers the capacitor unit 12 from below. The lower cover 32 is fastened to the central plate 31 via bolts or the like (not shown). The lower cover 32 also has an opening 32a for exposing the connector unit 15.

[0038] In this embodiment, the weight portion 33 is provided on the upper cover 30 as shown in Fig. 4. The weight portion 33 is provided on the underside 30c of the top wall portion 30a, which is the inner wall of the housing body 35, and damps vibrations of the housing body 35. In this embodiment, the weight portion 33 is made up of a plurality of ribs 33a (protrusions) arranged at intervals from one another.

[0039] Each rib 33a is formed to protrude downward from the lower surface 30c of the top wall portion 30a. Each rib 33a is formed to extend linearly along the short side direction. These ribs 33a are arranged in the longitudinal direction (i.e., the longitudinal direction that is along the lower surface 30c, which is the inner wall, and perpendicular to the short side direction in which the ribs 33a extend). In other words, gaps are provided between the multiple ribs 33a.

[0040] 3 , the capacitor unit 12 is connected to the intelligent power module 10 and is disposed to the side of the power module 20. The capacitor unit 12 is a unit including the capacitor C provided in the step-up / step-down converter 2. The capacitor unit 12 includes elements that form the capacitor C and a housing that covers these elements.

[0041] The reactor unit 13 is fixed to the center plate 31. The reactor unit 13 is connected to the intelligent power module 10 via a bus bar (not shown), and in this embodiment, is disposed above the center plate 31. The reactor unit 13 is a unit that includes the reactor L provided in the step-up / step-down converter 2.

[0042] The DCDC converter unit 14 is fixed to the central plate 31. The DCDC converter unit 14 is connected to the intelligent power module 10 via a bus bar (not shown), and in this embodiment, is disposed above the central plate 31. The DCDC converter unit 14 is a unit that forms the DCDC converter 4 shown in FIG.

[0043] The connector unit 15 is a unit to which the motor-side connector of the motor unit is connected. In this embodiment, the connector unit 15 is disposed below the partition wall portion 31a of the center plate 31. The connector unit 15 is also disposed further below the intelligent power module 10.

[0044] The main body case 11 of this embodiment houses electronic components such as the capacitor unit 12, the reactor unit 13, the DCDC converter unit 14, and the connector unit 15. The main body case 11 of this embodiment includes a housing main body 35 and a weight portion 33. The housing main body 35 forms an internal space K that houses the electronic components. The weight portion 33 is provided on the inner wall of the housing main body 35 and damps vibrations of the housing main body 35. The weight portion 33 also includes a plurality of ribs 33a arranged at intervals from one another.

[0045] The main body case 11 of this embodiment can enhance the damping effect of the housing main body 35 by using the weight portion 33. Furthermore, the main body case 11 of this embodiment includes a plurality of ribs 33a arranged at intervals from one another. This allows the housing main body 35 to flex so as to change the distance between the ribs 33a. In other words, this embodiment can prevent the weight portion 33 from hindering the upper cover 30 from flexing so as to displace its longitudinal end in the vertical direction. Therefore, the main body case 11 of this embodiment can prevent the weight portion 33 from unnecessarily increasing the rigidity of the housing main body 35 and thus preventing the resonant frequency of the housing main body 35 from increasing. Therefore, the main body case 11 of this embodiment can prevent the resonant frequency of the housing main body 35 from increasing while still achieving the vibration damping effect of increased weight.

[0046] In the main body case 11 of this embodiment, the ribs 33a protrude from the lower surface 30c of the top wall 30a and extend linearly along the lower surface 30c. The ribs 33a are arranged along the inner wall in a direction perpendicular to the direction in which the ribs 33a extend.

[0047] According to the case body 11 of this embodiment, the weight portion 33 can prevent the upper cover 30 from bending so that the longitudinal ends of the upper cover 30 are displaced in the up-down direction, as described above. On the other hand, according to the case body 11 of this embodiment, the weight portion 33 can prevent the upper cover 30 from bending so that the ends in the direction in which the ribs 33a extend (the short direction) are displaced in the up-down direction. Therefore, according to the case body 11 of this embodiment, it is possible to adjust the rigidity of the upper cover 30 depending on the direction.

[0048] Furthermore, in the main body case 11 of this embodiment, the housing main body 35 includes a reinforcing portion 30d that extends linearly to improve the rigidity of the housing main body 35. Furthermore, the ribs 33a are arranged along the extension direction of the reinforcing portion 30d. With this main body case 11 of this embodiment, it is possible to prevent the rigidity of the upper cover 30 from being increased more than necessary in the same direction as the reinforcing portion 30d due to the influence of the weight portion 33.

[0049] The power conversion device 1 of this embodiment includes electronic components that perform power conversion and the above-described main body case 11. Since the power conversion device 1 of this embodiment includes the above-described main body case 11, it is possible to obtain a vibration damping effect due to the increased weight of the housing main body 35, while suppressing an increase in the resonance frequency of the housing main body 35.

[0050] Second Embodiment Next, a second embodiment of the present invention will be described with reference to Fig. 5. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0051] 5 is a schematic cross-sectional view including a rib 33a provided on the main body case of this embodiment. As shown in this figure, in this embodiment, the rib 33a has a recess 33c recessed toward the inner wall (the lower surface 30c of the top wall 30a) from an edge 33b located on the opposite side from the inner wall. In this embodiment, the recess 33c is formed in a curved shape so that the center portion in the short direction bulges upward.

[0052] By providing recesses 33c in ribs 33a in this way, the weight and rigidity of ribs 33a can be changed, and the weight of weight portion 33 and the degree of change in rigidity of upper cover 30 due to weight portion 33 can be adjusted.

[0053] It is not necessary to provide recesses 33c in all ribs 33a. For example, recesses 33c may be provided in some of the multiple ribs 33a except for those near the longitudinal ends. Furthermore, the shape and size of the recesses 33c do not need to be the same for all ribs 33a. For example, the length in the lateral direction of the recesses 33c of the rib 33a located in the longitudinal center may be the longest, and the length in the lateral direction of the recesses 33c of the ribs 33a may become shorter from the longitudinal center toward the ends.

[0054] According to the main body case of this embodiment, the shape of the recess 33c can be adjusted to adjust the resonance frequency of the upper cover 30. Furthermore, the shape of the recess 33c can also be adjusted to adjust the vibration mode of the upper cover 30.

[0055] Third Embodiment Next, a third embodiment of the present invention will be described. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0056] 6 is a schematic cross-sectional view including the rib 33a provided on the main body case of this embodiment. As shown in this figure, in this embodiment, an inner wall rib 30e is provided on the lower surface 30c of the top wall portion 30a (base) so as to protrude toward the internal space K. The inner wall rib 30e is a part formed as part of the upper cover 30 for heat dissipation and strength adjustment.

[0057] In this embodiment, the rib 33a forming the weight portion 33 is connected to the edge of the inner wall rib 30e. Specifically, the rib 33a is provided so as to protrude downward from the edge of the inner wall rib 30e on the side opposite to the top wall portion 30a. For example, the vertical dimension of the rib 33a is 1.5 times the vertical dimension of the inner wall rib 30e.

[0058] Even if the upper cover 30 has a structure having an inner wall rib 30e, as in the main body case of this embodiment, the weight portion 33 formed by the rib 33a can be installed in conjunction with the inner wall rib 30e.

[0059] Fourth Embodiment Next, a fourth embodiment of the present invention will be described. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0060] 7 is a perspective view of the upper cover 30 of the main body case of this embodiment, viewed from below. As shown in this figure, the upper cover 30 of this embodiment has a plurality of pins 33d (protrusions) instead of the ribs 33a of the first embodiment. The pins 33d are arranged in the longitudinal direction at intervals. The pins 33d are also arranged in the lateral direction at intervals. In other words, the pins 33d are arranged in the longitudinal direction and lateral direction along the underside 30c of the top wall 30a.

[0061] In this embodiment, the weight portion 33 can be prevented from hindering bending of the upper cover 30 so that the short-side end portion is displaced in the up-down direction. Therefore, the main body case 11 of this embodiment can prevent the weight portion 33 from increasing the rigidity of the housing main body 35 more than necessary, and can prevent the resonant frequency of the housing main body 35 from increasing. Therefore, the main body case 11 of this embodiment can prevent the resonant frequency of the housing main body 35 from increasing while obtaining the vibration damping effect due to the increased weight.

[0062] Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to Fig. 8. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0063] Fig. 8 is a schematic diagram showing a general configuration of a power conversion device 1 of this embodiment. As shown in Fig. 8, the power conversion device 1 of this embodiment includes a first electronic component D1, a second electronic component D2, and a third electronic component D3. The first electronic component D1 and the second electronic component D2 are housed in a space surrounded by an upper cover 30 and a center plate 31. The third electronic component D3 is housed in a space surrounded by a lower cover 32 and the center plate 31.

[0064] In this embodiment, the first electronic component D1 is the heaviest of the first, second, and third electronic components D1, D2, and D3. As shown in Fig. 8, in the power converter 1 of this embodiment, the weight portion 33 is arranged to overlap the first electronic component D1 when viewed from above. That is, in the power converter 1 of this embodiment, the weight portion 33 is arranged to face the first electronic component D1, which is the heaviest electronic component.

[0065] According to this embodiment, the first electronic component D1, which is the heaviest electronic component, damps vibrations of the power conversion device 1. By disposing the weight portion 33 opposite the first electronic component D1, the damping effect of the first electronic component D1 and the damping effect of the weight portion 33 interact with each other, thereby further improving the damping effect.

[0066] Sixth Embodiment Next, a sixth embodiment of the present invention will be described with reference to Fig. 9. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0067] 9 is a schematic perspective view of the upper cover 30 of this embodiment, as seen from below. As shown in this figure, in this embodiment, the depth of the upper cover 30, which is a container-shaped cover-like container portion, is formed so that it increases along the arrangement direction (longitudinal direction) of the ribs 33a. As shown in FIG. 9, the upper cover 30 has a first region R1 having a large average depth and a second region R2 having a small average depth.

[0068] In this embodiment, the weight portion 33 is disposed in the first region R1 of the first region R1 and the second region R2. That is, the weight portion 33 is disposed in the region (first region R1) where the depth dimension of the upper cover 30 is deep.

[0069] The first region R1 is more prone to vibration than the second region R2 because it has a larger depth. By disposing the weight portion 33 in the first region R1, vibration of the main body case can be effectively damped.

[0070] Seventh Embodiment Next, a seventh embodiment of the present invention will be described with reference to Fig. 10. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0071] 10 is a schematic perspective view of the upper cover 30 of this embodiment, as seen from below. As shown in this figure, in this embodiment, the width dimension (widthwise dimension) of the upper cover 30, which is a container-shaped cover-like container portion, varies depending on the position in the longitudinal direction. As shown in FIG. 10, the upper cover 30 has a third region R3 having a larger average width dimension and a fourth region R4 having a smaller average width dimension.

[0072] In this embodiment, the weight portion 33 is disposed in the third region R3 of the third region R3 and the fourth region R4. That is, the weight portion 33 is disposed in the region of the upper cover 30 where the width dimension is large (the third region R3).

[0073] The third region R3 is larger in width than the fourth region R4, and is therefore more susceptible to vibration. By disposing the weight portion 33 in the third region R3, the vibration of the main body case can be effectively damped.

[0074] Eighth Embodiment Next, an eighth embodiment of the present invention will be described with reference to Fig. 11. In the description of this embodiment, the description of the same parts as those in the first embodiment will be omitted or simplified.

[0075] 11 is a schematic bottom view of the upper cover 30 of this embodiment. As shown in this figure, the upper cover 30 of this embodiment has a plurality of fastening portions 30f that are fastened to the center plate 31, which is a mating member.

[0076] 11, two fastening portions 30f arranged in the longitudinal direction are provided on one short edge of the upper cover 30. Two fastening portions 30f arranged in the longitudinal direction are also provided on the other short edge of the upper cover 30.

[0077] In this embodiment, the weight portion 33 is disposed at a position evenly spaced in the longitudinal direction from the two fastening portions 30f that are disposed on the same edge of the upper cover 30. That is, in this embodiment, the weight portion 33 is disposed in the center in the longitudinal direction between the two fastening portions 30f that are disposed on the same edge of the upper cover 30.

[0078] The further away from the fastening portion 30f the greater the vibration tends to be. For this reason, the center position between the two fastening portions 30f is a location where vibration tends to be greater. By installing the weight portion 33 in such a location, the vibration of the main body case can be effectively damped.

[0079] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiments. The shapes and combinations of the components shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0080] For example, in the above embodiment, the weight portion 33 is provided on the upper cover 30 of the housing body 35. However, the present invention is not limited to this. It is also possible to adopt a configuration in which the weight portion 33 is provided on the center plate 31 and the lower cover 32.

[0081] The above embodiment can also be described as follows, for example:

[0082] (Supplementary Note 1) An electronic component storage housing for storing electronic components, comprising: a housing main body that forms an internal space for storing the electronic components; and a weight portion that is provided on an inner wall of the housing main body and damps vibrations of the housing main body, wherein the weight portion comprises a plurality of protrusions that are arranged at intervals from each other.

[0083] (Supplementary Note 2) The electronic component housing according to Supplementary Note 1, wherein the protrusions are ribs that protrude from the inner wall and extend linearly along the inner wall, and the ribs are arranged along the inner wall in a direction perpendicular to the direction in which the ribs extend.

[0084] (Supplementary Note 3) The electronic component housing according to Supplementary Note 2, wherein the rib has a recess recessed from an edge located on the opposite side from the inner wall toward the inner wall.

[0085] (Appendix 4) The electronic component housing housing according to appendix 2 or 3, characterized in that the housing main body has a base and an inner wall rib protruding from the base toward the internal space, and the rib is connected to an edge of the inner wall rib.

[0086] (Appendix 5) The electronic component housing according to appendix 1, wherein the protrusions are pins protruding from the inner wall, and the pins are arranged in a first direction along the inner wall and a second direction along the inner wall and perpendicular to the first direction.

[0087] (Supplementary Note 6) The electronic component housing according to any one of Supplementary Notes 1 to 5, wherein the housing houses a plurality of the electronic components, and the weight portion is disposed opposite the electronic component having the greatest weight.

[0088] (Appendix 7) The electronic component housing housing described in any one of Appendices 1 to 6, characterized in that the housing main body has a cover-shaped container portion whose depth dimension changes along the direction in which the protrusions are arranged, and the weight portion is arranged in a region where the depth dimension of the cover-shaped container portion is deep.

[0089] (Appendix 8) The electronic component housing housing described in any one of Appendices 1 to 6, characterized in that the housing main body has a cover-shaped container portion whose width dimension changes along the direction in which the protrusions are arranged, and the weight portion is arranged in an area where the width dimension of the cover-shaped container portion is large.

[0090] (Appendix 9) The electronic component housing housing described in any one of Appendices 1 to 8, characterized in that the housing main body has a plurality of fastening portions that are fastened to a mating member, the fastening portions are arranged along the direction in which the protrusions are arranged, and the weight portion is arranged at a position evenly spaced from the two fastening portions in the direction in which the protrusions are arranged.

[0091] (Appendix 10) The electronic component housing according to any one of Appendices 1 to 9, wherein the housing body includes a reinforcing portion that extends linearly to improve the rigidity of the housing body, and the protrusions are arranged along the extension direction of the reinforcing portion.

[0092] (Supplementary Note 11) A power conversion device comprising: the electronic component that performs power conversion; and the electronic component housing according to any one of Supplementary Notes 1 to 10.

[0093] REFERENCE SIGNS LIST 1 Power conversion device 2 Step-up / down converter 3 Inverter 4 DC / DC converter 10 Intelligent power module (electronic component) 11 Main body case (electronic component housing) 12 Capacitor unit (electronic component) 13 Reactor unit (electronic component) 14 DC / DC converter unit (electronic component) 15 Connector unit (electronic component) 20 Power module (electronic component) 21 Gate driver board (electronic component) 22 ECU board (electronic component) 30 Upper cover (cover-like container part) 30a Ceiling wall part 30b Peripheral wall part 30c Lower surface (inner wall) 30d Reinforcement part 30e Inner wall rib 30f Fastening part 33 Weight part 33a Rib (protrusion part) 33b Edge part 33c Recessed part 33d Pin 35 Housing main body 100 Vehicle D1 First electronic component D2 Second electronic component D3 Third electronic component K Internal space R1 First region R2 Second region R3 Third region R4 Fourth region

Claims

1. An electronic component housing housing for housing electronic components, comprising: a housing main body that forms an internal space for housing the electronic components; and a weight portion provided on an inner wall of the housing main body to damp vibrations of the housing main body, wherein the weight portion comprises a plurality of protrusions arranged at intervals from one another.

2. The electronic component housing according to claim 1, characterized in that the protrusions are ribs that protrude from the inner wall and extend linearly along the inner wall, and the ribs are arranged along the inner wall in a direction perpendicular to the direction in which the ribs extend.

3. The electronic component housing according to claim 2, wherein the rib has a recess recessed from an edge located on the opposite side from the inner wall toward the inner wall.

4. An electronic component housing housing according to claim 2 or 3, characterized in that the housing body has a base and an inner wall rib protruding from the base toward the internal space, and the rib is connected to the edge of the inner wall rib.

5. The electronic component housing according to claim 1, characterized in that the protrusions are pins that protrude from the inner wall, and the pins are arranged in a first direction along the inner wall and in a second direction that also runs along the inner wall and is perpendicular to the first direction.

6. An electronic component housing according to any one of claims 1 to 3, characterized in that it houses a plurality of said electronic components, and said weight section is disposed opposite said electronic component that is the heaviest.

7. An electronic component housing housing according to any one of claims 1 to 3, characterized in that the housing main body has a cover-shaped container part whose depth dimension changes along the direction in which the protrusions are arranged, and the weight part is arranged in a region where the depth dimension of the cover-shaped container part is deep.

8. An electronic component housing housing according to any one of claims 1 to 3, characterized in that the housing body has a cover-shaped container part whose width dimension changes along the direction in which the protrusions are arranged, and the weight part is arranged in an area where the width dimension of the cover-shaped container part is large.

9. An electronic component housing housing according to any one of claims 1 to 3, characterized in that the housing body has a plurality of fastening parts to be fastened to a mating member, the fastening parts are arranged in the direction in which the protrusions are arranged, and the weight part is arranged at an equal distance from the two fastening parts in the direction in which the protrusions are arranged.

10. An electronic component housing according to any one of claims 1 to 3, characterized in that the housing body has a reinforcing part that extends linearly to improve the rigidity of the housing body, and the protrusions are arranged along the extension direction of the reinforcing part.

11. A power conversion device comprising: the electronic component that performs power conversion; and the electronic component housing according to any one of claims 1 to 3.

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