JP4580358B2 - Diesel engine preheating heater energization control device - Google Patents

Description

  The present invention relates to an energization control device that controls energization of a preheating heater such as a glow plug or an air heater (intake heater) used for improving the startability of a diesel engine.

  Conventionally, as an energization control device that controls energization of preheater heaters such as glow plugs and air heaters used in diesel engines, circuit components including power control elements that form the control circuit are mounted on one side of a ceramic wiring board and wiring is performed. 2. Description of the Related Art An energization control device for a diesel engine preheating heater having a structure in which a non-mounting surface (back surface) of a substrate is in close contact with a metal case member such as aluminum die cast is known.

In this energization control device, heat generated in the power control element by energization control can be dissipated from the metal case member through the wiring board. Therefore, if the appropriate heat dissipation performance is ensured, the temperature of the power control element itself Does not rise extremely, it is possible to perform energization control continuously over a long period of time.
However, ceramic wiring boards are expensive. In addition, since the control circuit is configured by single-sided mounting on the wiring board, the more complicated the circuit configuration, the larger and more expensive the wiring board is required. Further, there is a demerit such that the physique of the energization control device itself becomes large.

  On the other hand, if a wiring board made of a resin or a composite material containing resin is used instead of the ceramic wiring board, an inexpensive wiring board can be obtained. Furthermore, if circuit components are mounted on both sides of the wiring board, the size of the wiring board and the entire circuit including the circuit board (the entire energization control circuit) can be further reduced. However, when double-sided mounting is used, it is difficult to dissipate heat through the case member because one side cannot be brought into close contact with the case as in the prior art.

  Further, when the wiring board (power control element) is surrounded by the resin case without using the metal case, there is an advantage that the case member can be made light and inexpensive. Further, when the wiring board (power control element) is surrounded by the resin filler, there is an advantage that the wiring board (power control element) can be easily protected from moisture or an external object. However, these have disadvantages that are not suitable for heat dissipation. Therefore, when circuit components are mounted on both sides of a wiring board such as resin and surrounded by a resin case member, or when the wiring board is surrounded by a resin filler, the cost can be reduced. There is a problem inferior to the conventional one.

By the way, for heat dissipation, the temperature of the power control element (for example, the junction temperature of the element) rises due to the heat generated during energization control, and the power control element itself fails (thermal destruction) or is safe for the power control element itself. In order to prevent the energization from being interrupted by the operation of the circuit, this is performed to lower the temperature of the power control element below the upper limit temperature.
Therefore, if there is a possibility that the energization control is continued with this energization control device (power control element) over a long period of time, such as when there is no restriction on the energization period, the temperature of the power control element over the long period of time. It is necessary to perform sufficient heat dissipation so that the temperature can be kept below the upper limit temperature.

However, when there is an upper limit of the energization period in which energization control is continuously performed by this energization control device (power control element), the temperature of the power control element is lowered below the upper limit temperature only during this energization period even if heat dissipation is not sufficient. It is sufficient if possible, and by temporarily delaying the temperature rise of the power control element, it is possible to ensure a long period during which the energization control can be performed by this energization control device.
The present invention has been made paying attention to such a point, and an object thereof is to provide an energization control device that can ensure a longer period during which energization can be controlled by a power control element while having a simple configuration.

The solution includes a circuit board comprising a power control element, a circuit component forming at least part of a control circuit for controlling electric power applied to a diesel engine preheating heater, and a resin or a resin-containing composite material, Resin that surrounds at least the power control element while restricting the circulation between the wiring board formed by mounting the circuit component including the power control element on both sides of the circuit board and the air around the power control element. A case member made of metal, or at least one of a resin filler filled around the power control element and surrounding the power control element, and disposed around the power control element, the case member and the resin filling It has higher thermal conductivity than the material, temporarily stores the heat generated by the power control element, and increases the temperature of the power control element. Possess a temperature rise delay means causes al, and the temperature rise delay means is mounted on the wiring board, a power supply control apparatus for a diesel engine preheating heater is a plurality of metal lumps isomorphic.

In the energization control device of the present invention, the power control element is surrounded by the case member or the resin filler, but the temperature rise delay means temporarily stores the heat generated by the power control element, and the temperature rise is delayed. Yes.
For this reason, for example, when the glow plug is energized using the energization control device of the present invention to generate heat, the power control element generates heat, but the temperature rise delay means temporarily heats the surroundings of the power control element. Accumulate heat to delay the temperature rise of the power control element. For this reason, the temperature of the power control element itself is unlikely to rise as compared with the case where there is no temperature rise delay means. Therefore, compared with the case where the energization control device is not provided with this temperature rise delay means, the time from when energization is started until the temperature of the power control element rises and the power control element is destroyed by heat. In addition, it is possible to lengthen the time until the energization is forcibly stopped to prevent the power control element from being destroyed by heat, or the time until the energization is forcibly stopped by the safety circuit of the power control element itself.
As a result, even if the heat generated by the power control element is insufficient due to the case member or the resin filler, the power control element can be operated for a long time compared to the case without this temperature rise delay means. Thus, the heater for preheating the diesel engine can be operated.
Furthermore, as the temperature rise delay means, a large number of metal blocks having the same shape mounted on the wiring board are used, so that the metal blocks can be easily arranged even if the region where the metal blocks are arranged is irregular. Moreover, it can respond easily to the shape change of the area | region which arrange | positions a metal lump.

In addition, as a wiring board made of a resin or a composite material containing a resin, a wiring board made of a resin such as epoxy or BT resin, a glass cloth base epoxy board in which a glass nonwoven fabric is impregnated with an epoxy resin, glass fiber, resin fiber, etc. And a composite material obtained by impregnating a woven or non-woven fabric with a resin.
Examples of the diesel engine preheating heater include a glow plug and an air heater (intake heater).
Further, the power control element is a control element capable of controlling a large amount of power supplied to the heater, and includes a power transistor, a power MOSFET, a GTO, an SCR, and a switch element using these.
Furthermore, the resin forming the case member may be appropriately selected in consideration of insulation, heat resistance, moisture resistance, weather resistance, and the like, and examples thereof include nylon, polypropylene, and PET. The resin filler may be selected in consideration of insulation, heat resistance, moisture resistance, weather resistance, etc., and for example, an epoxy resin or a urethane resin can be used.

  Further, the temperature rise delay means is disposed around the power control element, has higher thermal conductivity than the case member and the resin filler, temporarily stores heat generated by the power control element, and the temperature of the power control element. It will delay the rise. Specifically, a member that can directly or indirectly contact the power control element and efficiently receive and store heat generated by the power control element can be mentioned. More specifically, a metal body directly connected to the power control element can be mentioned. Moreover, the metal body mounted and fixed to the circumference | surroundings of the mounting part of a power control element or the back surface part of a mounting part is mentioned among wiring boards. Further, there is a metal body in which a part is fixed around the mounting part or the back part of the mounting part and the other part is arranged away from the wiring board. Furthermore, these metal bodies also serve as one of the external connection terminals of the energization control device, and pass through the connection member of the external device connected to the external connection terminal that also serves as heat storage. It is also possible to release heat to the outside.

Furthermore, in the energization control device for the diesel engine preheating heater described above, the power control element is made of metal, and has a metal heat radiating portion for releasing heat generated in itself to the outside. Mounted in close contact with the element mounting region of one side of the wiring board, and a large number of the metal blocks having the same shape as the temperature rise delay means are on the other side opposite to the one side of the wiring board. among them, preferable to the energization control apparatus for a diesel engine preheating heater is gold Shokukatamari disposed in close contact with the metal block arrangement region including an element mounting surface opposite region opposite to the element mounting area.

In the energization control device of the present invention, the metal block is closely attached to the metal block arrangement region including the element mounting reverse surface region on the opposite side to the element mounting region where the metal heat dissipation portion of the power control element is in close contact with the wiring board. Arranged. For this reason, the heat generated in the power control element can be quickly transferred to the metal block disposed on the opposite side of the power control element through a very close path through the metal heat radiating portion and the wiring board. Can be temporarily stored. Therefore, a part of the heat generated in the power control element can be reliably stored quickly with this metal lump, and the power control element is operated for a longer time by delaying the temperature rise of the power control element during the energization control. be able to.
Moreover, in the energization control device of the present invention, the metal lump is arranged on the wiring board, so that the arrangement is easy.

The metal heat dissipating part of the power control element may be in close contact with the element mounting area on one side of the wiring board, but more preferably, the element mounting area is a metal layer such as a copper foil provided on the wiring board. It is preferable to join the metal heat radiating portion of the power control element by soldering. This is because the metal heat dissipating portion can be securely adhered to the wiring board, and heat generated by the power control element can be more easily transmitted to the wiring board and to the metal block via this.
Further, the metal block only needs to be in close contact with the other surface of the wiring board. More preferably, the metal block is formed by a metal layer such as a copper foil provided on the wiring board, and the metal block is soldered here. It is preferable to join by attaching. This is because the metal lump can be securely adhered to the wiring board and the heat generated by the power control element can be more easily received from the wiring board.

The area of the portion in close contact with the metal block arrangement area, smaller than the metal heat radiating portion 1 corresponding to a pair of power control element, Ru is adhered arranged a large number of metal masses metal block arrangement region. As described above, by using a plurality of small metal blocks, the metal blocks can be easily arranged in the irregularly shaped metal block arrangement region. There is an advantage that it is possible to easily cope with the shape change of the metal lump arrangement region. As such a metal lump, it is preferable to use a metal lump having a form and configuration that can be automatically mounted by a device such as a chip mounter and can be fixed to a metal lump arrangement region of a wiring board by a reflow device. Fixing by mounting or soldering can be done automatically like other electronic components mounted on the wiring board, so it can be handled in the same way as other chip-type electronic components and can be easily fixed. It is. As such a metal lump, for example, a check pin that can be automatically mounted and reflowed can be used.

Furthermore, it is an energization control device for a heater for preheating a diesel engine, wherein the power control element is made of metal and has a metal heat radiating portion for escaping heat generated therein to the outside, and the metal heat radiating portion is connected to the wiring. Mounted in close contact with the element mounting region of one surface of the substrate, the temperature rise delay means is a separate heat storage member made of metal in addition to a large number of the metal lumps in the same shape, The one side or the other side opposite to the one side, and a spacing part connected to the spacing part, and the periphery of the element mounting area or in the element mounting area of the other side It is preferable that the energization control device for the heater for diesel engine preheating, which is a separated heat storage member, having a coupling portion coupled to the wiring board in a coupling region around the opposite element mounting reverse surface region.

In the energization control device of the present invention, as the temperature rise delay means, in addition to a large number of metal lumps having the same shape, there are spaced heat storage members. The separation heat storage member is made of metal, and is connected to the separation portion and the separation portion, and is coupled to the wiring board in a coupling region around the element mounting region or around the element mounting reverse surface region. Has a part. Therefore, the heat generated in the power control element is quickly transmitted to the coupling portion of the separated heat storage member and further to the separation portion through the coupling region around the element mounting region or the element mounting reverse surface region. Therefore, a part of the heat generated by the power control element can be stored quickly and reliably by this separated heat storage member, and the energization control device is operated for a longer time by delaying the temperature rise of the power control element during energization control. Can be made.

The metal heat dissipating part of the power control element may be in close contact with the element mounting area on one side of the wiring board, as described above, but more preferably, the element mounting area is a metal layer provided on the wiring board. It is preferable to join the metal heat dissipating part by soldering. The metal heat radiation part can be securely adhered to the wiring board, and the heat generated by the power control element can be more easily transferred to the metal layer in the element mounting region and to the joint part of the separated heat storage member via the metal layer. Because.
Moreover, it is preferable that the element mounting reverse surface region is constituted by a metal layer provided on the wiring board. This is because heat generated by the power control element can be more easily transferred to the metal layer in the element mounting reverse surface region and the joint portion of the separated heat storage member via the metal layer.
Moreover, the coupling | bond part of a space | interval thermal storage member should just be couple | bonded with the wiring board in the coupling | bonding area | region around the element mounting area | region of one side of a wiring board, or the element mounting reverse side area | region of the other side. Furthermore, it is preferable that the coupling region is constituted by a metal layer such as a copper foil provided on the wiring board, and the coupling portion of the separated heat storage member is coupled thereto by soldering. This is because the heat generated in the power control element can be more easily transferred to the metal layer in the coupling region and the coupling portion of the separated heat storage member via the metal layer.

  In particular, it is preferable that the element mounting region on one side of the wiring board and the surrounding coupling region are configured with a common metal layer, or the element mounting reverse surface region on the other side and the surrounding coupling region are configured with a metal layer. . Heat generated in the power control element can be more easily transferred to the metal layer in the element mounting area and the coupling area, or the metal layer in the element mounting reverse surface area and the coupling area, and to the coupling portion of the separated heat storage member via these. Because.

  The separation heat storage member may be a metal member having a coupling portion and a separation portion. For example, a metal plate is bent into an L shape, a U shape, or the like to form a coupling portion and a separation portion. Is mentioned. In this case, since the separated heat storage member can be configured by press molding of a metal plate or the like, there is an advantage that it is inexpensive and easy to form.

  Furthermore, in this energization control device, a diesel engine preheating heater in which at least a part of the circuit component is disposed between a separation portion of the separation heat storage member and one surface or the other surface of the wiring board. It is preferable to use an energization control device.

In this energization control device, a circuit component such as a power control element is provided between the separation portion of the separation heat storage member and one surface or the other surface of the wiring board. That is, in this energization control device, the separated heat storage member does not reduce the mounting area of the circuit components on the wiring board while having the separated portion, and therefore there is an advantage that a smaller area wiring board is sufficient.
In addition, although circuit components other than a power control element can also be arrange | positioned between a separation | spacing part and the one side or the other side of a wiring board, it is preferable to arrange | position a power control element. When the heat generated by the power control element does not pass through the wiring board and there is a space between the power control element and the separated portion, the power control element is separated from the power control element by infrared radiation from the power control element. In the case where the resin filler is filled between the portions, it can be further transmitted to the separated portion by the electric heat passing through the filled resin filler. For this reason, the temperature rise of the power control element can be delayed.

  Furthermore, in the above-described energization control device for the diesel engine preheating heater, the separated heat storage member may be an energization control device for the diesel engine preheating heater that also serves as one of the external connection terminals.

  In the energization control device of the present invention, the separated heat storage member also serves as an external connection terminal. Therefore, in this energization control device, it is possible to temporarily store heat with the separated heat storage member, and to release heat to the outside via the connection member of the external device connected to this external connection terminal. is there. For this reason, in this energization control device, the temperature rise of the power control element can be further delayed, and energization control for a longer time can be performed.

The external connection terminal refers to a connection terminal for inputting / outputting electric power or signals between the energization control device and an external device. Examples of the external device include sensors such as an ECU, a battery, a key switch, an alternator, and a water temperature sensor. Further, although not an external device, an external connection terminal connected to the ground potential can be cited as one that performs input / output with the outside.
It is preferable to use an external connection terminal for inputting or outputting a current flowing through the heater, for example, a battery voltage terminal or a ground voltage terminal, as the external connection terminal that also serves as the separated heat storage member. These terminals for inputting / outputting a large current flowing through the heater have a low resistance, so that, for example, the thickness and width of the current flowing portion are made larger than the external connection terminals for inputting / outputting signals, The cross-sectional area is often increased. This is because, when such an external connection terminal having a large cross-sectional area is also used as the separated heat storage member, a large amount of heat can be stored, and heat can be easily released to the outside in terms of heat dissipation.

That is, in the above-described diesel engine preheating heater energization control device, the separated heat storage member serves as an external connection terminal through which the largest current flows among the external connection terminals used in the energization control device. It is preferable to use an energization control device.
Alternatively, in the above-described diesel engine preheating heater energization control device, the separated heat storage member also serves as an external connection terminal having a largest cross-sectional area of a current flowing portion among the external connection terminals used in the energization control device. It is preferable to use an energization control device for a diesel engine preheating heater.

(Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS.
First, a glow plug energization control system 1 for a diesel engine using the energization control apparatus 100 according to the first embodiment will be described. The energization control system 1 includes an energization control device 100, an engine control unit 3 (Engine Control Unit: hereinafter referred to as ECU), a key switch KSW, a battery BT, an alternator 4, and glow plugs GP1 to GP1 to be controlled. GP4 is included.

In addition, the energization control device 100 includes a control circuit 2 including four power control elements 141 mounted on both surfaces of the wiring board 120 and other circuit components 142 as described later. The battery voltage Vb is input to the control circuit 2 (wiring board 120) from the battery BT through the battery voltage terminal 131. The power control element 141 used in the present embodiment is a high-side switch element including a power MOSFET, and is controlled by a signal generated by a circuit composed of other circuit components 142, and each of the four glow plugs GP1 to GP4. Switch on / off of power supply to. At the same time, the circuit composed of the other circuit components 142 is configured to detect the magnitude of the current flowing through the power control element 141 and the glow plugs GP1 to GP4 based on the output from the power control element 141. The magnitudes of the applied voltage (battery voltage Vb) to the glow plugs GP1 to GP4 and the energization current to the glow plugs GP1 to GP4 are digitized by an A / D converter (not shown) of the other circuit components 142.
The power control element 141 has a built-in safety circuit. When the junction temperature of the MOSFET exceeds a specified value (for example, 165 ° C.), the MOSFET is forcibly turned off and the MOSFET is thermally destroyed. You can prevent it from happening.

  Further, the control circuit 2 can communicate with the ECU 3 constituted by a microcomputer via the ECU communication terminals 135A and 135B. In response to this instruction from the ECU 3, the power control element 141 is switched, and the digitized applied voltage (battery voltage Vb) to the glow plugs GP1 to GP4 and the magnitude of the energization current to the glow plugs GP1 to GP4 are Sent. The ECU 3 is configured to receive a drive signal for the alternator 4.

In the energization control system 1, when the key switch KSW is set to the on position and the start position, power is supplied to the control circuit 2 via the power supply terminal 136 and operation starts. On the other hand, when the key switch KSW is turned OFF, the power supply to the control circuit 2 is interrupted and the operation is stopped.
In addition to the battery voltage terminal 131, the wiring board 120 has glow plug connection terminals 133 </ b> G <b> 1, 133 </ b> G <b> 4 for connection to the ECU communication terminals 135 </ b> A and 135 </ b> B, the glow plug GP <b> 1, and the like as other external connection ends 132. A ground terminal 134 and a power supply terminal 136 are included.
In the present embodiment, the magnitude of the energization current to the glow plugs GP <b> 1 to GP <b> 4 has been obtained by the other circuit components 142. However, without obtaining this, the duty control (PWM) is performed based on the battery voltage Vb. Control).
Further, although the power control element 141 used in the present embodiment has been shown with a built-in safety circuit, a power control element that does not include a safety circuit can also be used.

The energization control device 100 used in the energization control system 1 has the form shown in FIGS. 1 and 3. That is, the energization control device 100 includes a case member 110 made of an insulating resin, a wiring board 120 surrounded by the case member 110, and a power control element that is mounted on both sides of the wiring board and constitutes the control circuit 2. 141 and other circuit components 142, a battery voltage terminal 131 for connecting to the battery BT, ECU 3, and the like, and other external connection terminals 132. The battery voltage terminal 131 and other external connection terminals 132 are connected to each part of the control circuit 2, and extend from the wiring board 120 and protrude outward (to the left in FIG. 3).
The wiring board 120 is also mounted with a large number of metal check pins that are constricted at the center and have an H-shape.

Among these, the case member 110 includes a substrate surrounding part 111, a connector part 112, a flange part 113, and an attachment part 114. Among these, the board surrounding part 111 is formed in a box shape that holds the wiring board 120 inside and surrounds it. The board surrounding portion 111 has a board insertion slit 111S for holding the periphery of the wiring board 120, and a vent hole 111H that allows the inside and outside of the board surrounding portion 111 to be ventilated. A filter membrane (such as Gore-Tex (trade name)) that is impermeable to water droplets and permeable to air is secured so as to close the inner end of the vent hole 111H to ensure ventilation and to the inside. In some cases, a structure for preventing the intrusion of water droplets may be provided.
The connector portion 112 includes a connector portion 112A that surrounds the periphery of the battery voltage terminal 131 in the radial direction, and a connector portion 112B that surrounds the periphery of the other external connection terminal 132 in the radial direction. The flange portion 113 has a hook-like shape that is located between the board surrounding portion 111 and the connector portion 112 and protrudes in the radial direction. Furthermore, the attachment portions 114 provided at two places form legs for attaching the case member 110 (the power supply control device 100) to other members, and allow screws to be inserted.

Next, the relationship between the wiring board 120, the power control element 141 mounted on the wiring board 120, the battery voltage terminal 131, and the like will be described with reference to FIGS. As shown in FIG. 4, a power control element 141 is mounted on the lower surface 120R of the wiring board 120, and other circuit components 142 are mounted on the upper surface 120S and the lower surface 120R, respectively. That is, the wiring board 120 is a double-sided mounting board in which circuit components are mounted on both the upper surface 120S and the lower surface 120R.
The wiring board 120 is made of a multilayer glass epoxy composite material in which a glass fiber woven fabric is impregnated with an epoxy resin, and a circuit wiring layer (not shown) formed by etching, plating, or the like is formed on the upper surface, the lower surface, and the inside thereof. Is formed.

  Incidentally, the power control element 141 has the form shown in FIG. 6A, and a terminal 141T extends from the element body 141B surrounded by the resin. In addition, a metal heat radiating portion 141M made of metal is provided on the back surface of the element body 141B. An element chip (not shown) arranged in the element body 141B is connected to the metal heat radiating portion 141M, and heat generated in the element chip is radiated through the metal bottom heat radiating portion 141M. At the same time, the metal heat dissipating part 141M is a VCC terminal 141C (see FIG. 2) connected to the battery BT through the battery voltage terminal 131 in the power control element 141.

Therefore, as shown in FIG. 5B, when mounting the power control element 141 on the lower surface 120R of the wiring board 120, a rectangular element mounting region 121 for fixing the metal heat radiating portion 141M by soldering. Are provided in four places. In addition, these element mounting regions 121 and a portion including the connection regions 122 that are located around these elements and connect them to each other constitute a lower surface element mounting metal layer 123 made of copper foil or the like provided on the lower surface 120R. is doing. For this reason, in the element mounting region 121, the metal heat radiation part 141M of the power control element 141 can be easily adhered by soldering (see FIG. 4B).
Therefore, when the power control element 141 generates heat by energizing the glow plug GP1 or the like, heat is transmitted in the thickness direction of the wiring board 120 through the metal heat radiation portion 141M and the element mounting region 121 of the lower surface element mounting metal layer 123. be able to.

  Further, the lower surface element mounting metal layer 123 extends in a bent manner and extends around the six battery voltage terminal insertion holes 128H arranged in a row to form a battery voltage terminal connection region 128R. As can be seen from FIG. 4, the battery voltage terminal 131 is fixed to the battery voltage terminal connection region 128R by soldering, and the battery voltage Vb is applied to the battery voltage terminal connection region 128R. Through the mounting metal layer 123, the metal heat dissipation part 141M (VCC terminal 141C) of the power control element 141 is electrically connected.

  In addition, an external connection terminal connection region 129R in which the metal layer is exposed is formed at the periphery of the 12 external connection terminal insertion holes 129H arranged in two rows on the lower surface 120R. The external connection terminal connection region 129R is a region where the other external connection terminals 132 are fixed by soldering, as can be seen from FIG. 4B.

In addition to the power control element 141, other circuit components 142 are mounted on the lower surface 120R of the wiring board 120 (see FIG. 4B), so pads and the like for mounting the circuit components 142 are formed. However, illustration and description are omitted.
In the first embodiment, the lower surface 120R of the wiring board 120 is connected to the element mounting region 121 and the battery voltage terminal insertion hole 128H in the lower surface element mounting metal layer 123 in order to prevent corrosion and scratches on the metal layer and solder adhesion. Except for the peripheral edge portion, the external connection terminal connection region 129R, and the pad portion for mounting the circuit component 142 (not shown), it is covered with a solder resist (not shown).

On the other hand, as shown in FIG. 5A, among the upper surface 120S of the wiring board 120, the metal lump arrangement region 126 is made of copper foil or the like provided on the upper surface 120S, and the upper surface mounts the individual check pins 152. In order to obtain a pad to be used, the solder resist 126SR is divided into a square shape. The metal lump arrangement region 126 includes an element mounting reverse surface region 125 facing the above-described four element mounting regions 121 with the wiring board 120 interposed therebetween, as indicated by a broken line in FIG. .
As can be understood with reference to FIGS. 4A and 3, a large number of check pins 152 are mounted in the metal lump arrangement region 126 by soldering. Note that the check pin 152 can be securely adhered to the metal lump arrangement region 126 by soldering the check pin 152. In addition, it becomes easier to receive heat generated by the power control element from the wiring board. The check pin 152 is made of brass having a higher thermal conductivity than the resin forming the case member 110, and is nickel-plated on the entire surface.

Therefore, the heat transferred in the thickness direction of the wiring board 120 through the metal heat dissipating part 141M of the power control element 141 and the element mounting region 121 of the lower surface element mounting metal layer 123 is a metal block including the element mounting reverse surface region 125. It is transmitted to the metal check pin 152 through the arrangement area 126 and stored. In this way, the heat generated in the power control element 141 is transmitted to the multiple check pins 152 through a short path with a low thermal resistance, and is reliably stored quickly here. For this reason, the temperature rise of the power control element 141 is delayed as compared with the case where the check pin 152 is not provided.
Thus, when a large number of check pins 152 are arranged in the metal lump arrangement region 126 as in the first embodiment, even when the power control element 141 generates heat due to the energization control to the glow plug GP1 or the like, the energization control is started. Thus, the time until the junction temperature of the power control element 141 exceeds the operating temperature of the safety circuit (for example, 165 ° C.) can be increased, and the energization control device can be operated for a longer time. Further, if the energization control is completed in a shorter time than this time, the operation of the safety circuit in the power control element 141 can be prevented by performing heat storage using the check pin 152.

In particular, in the first embodiment, the element mounting region 121 is formed of a solderable metal layer, and the metal heat radiating portion 141M of the power control element 141 is soldered. Therefore, the metal heat radiating portion 141M is securely attached to the wiring board 120. In addition, heat generated by the power control element 141 can be more easily transmitted to the wiring board 120 and to the check pin 152 via the wiring board 120.
Similarly, since the metal block arrangement region 126 including the element mounting reverse surface region 125 is formed of a solderable metal layer and the check pin 152 is soldered, the check pin 152 is securely attached to the wiring board 120. In addition, the heat generated by the power control element 141 can be more easily received from the wiring board 120.

In the first embodiment, a large number of relatively small check pins 152 are arranged in the metal lump arrangement region 126. For this reason, as shown in FIGS. 4A and 5A, the check pin 152 can be easily arranged even in the irregular metal lump arrangement region 126 having the uneven portion. There is also an advantage that the shape change of the metal lump arrangement region 126 can be easily handled.
Furthermore, the check pin 152 used in the first embodiment can be automatically mounted on the upper surface 120S of the wiring board 120 by a device such as a chip mounter. Further, the check pin 152 can be fixed to the metal lump placement region 126 of the wiring board 120 by applying solder paste in advance to the metal lump placement region 126, and then placing the check pin 152 and passing through the reflow device. is there. Therefore, fixing by mounting or soldering can be automatically performed in the same manner as the other electronic components 141 and 142 mounted on the wiring board 120, and can be handled in the same manner as other chip-type electronic components. Placement can be fixed.

  The metal block arrangement region 126 and the battery voltage terminal connection region 128S extending around the six battery voltage terminal insertion holes 128H arranged in a row are both made of a metal layer and connected to each other. A part of the battery voltage terminal 131 is inserted into the battery voltage terminal insertion hole 128H, and is also soldered to the battery voltage terminal connection region 128S.

  Further, in the upper surface 120S, the external connection terminal connection region 129S where the metal layer is exposed is formed at the periphery of the 12 external connection terminal insertion holes 129H. As can be seen from FIG. 4A, a part of the other external connection terminal 132 is inserted into the external connection terminal insertion hole 129H and fixed to the external connection terminal connection region 129S by soldering. ing.

Since other circuit components 142 are also mounted on the upper surface 120S of the wiring board 120 (see FIG. 4A), pads and the like for mounting the circuit components 142 are formed. Omitted.
In the first embodiment, the upper surface 120S of the wiring board 120 includes the metal lump arrangement region 126, the peripheral portion of the battery voltage terminal insertion hole 128H, and the external connection terminals in order to prevent corrosion and scratches on the metal layer and to prevent solder adhesion. Except for the connection region 129S and the pad portion for mounting the circuit component 142 (not shown), the region is covered with a solder resist (not shown).

The energization control device 100 of the first embodiment is manufactured as follows.
The battery voltage terminal insertion hole 128H, the external connection terminal insertion hole 129H, and the attachment hole 120H are drilled, and the wiring board 120 on which a predetermined wiring pattern is formed is manufactured by a known method. Next, a solder paste is applied to the metal mass arrangement region 126, the element mounting region 121, and connection pads of other circuit components 142 (not shown) on the upper surface 120S and the lower surface 120R of the wiring board 120. Furthermore, the check pin 152, the power control element 141, and other circuit components 142 are mounted on the wiring board 120 using a chip mounter (not shown). Further, the wiring board 120 is passed through a reflow apparatus (not shown) to melt the panda paste, the check pin 152 is placed in the metal lump placement region 126, the metal heat dissipation part 141M of the power control element 141 is placed in the element mounting region 121, The other circuit components 142 are soldered to the respective connection pads.

  Separately, each member of the case member 110 is formed by injection molding. Specifically, among the case members 110, the members 110 </ b> A forming the outer peripheral portions of the substrate surrounding portion 111, the attachment portion 115, and the flange portion 113, which are hatched in FIG. 3, the inner portion of the flange portion 113, and the connector portion The member 110B forming the above is molded separately. The member 110B has a configuration in which one side of the battery voltage terminal 131 and the other external connection terminal 132 protrudes into the connector portions 112A and 112B, and the other side protrudes to the opposite side (the substrate surrounding portion 111 side). Thus, it is held on the inner part of the flange portion 113.

  A part (end part) of the battery voltage terminal 131 and a part (end part) of the other external connection end 132 are inserted into the battery voltage terminal insertion hole 128H and the external connection terminal insertion hole 129H of the wiring board 120, respectively. The wiring board 120 is fixed to the member 110B using the mounting holes 120H and the screws 151. A part of the battery voltage terminal 131 is soldered to the battery voltage terminal connection areas 128S and 128R, and a part of the other external connection end 132 is soldered to the external connection terminal connection areas 129S and 129R.

  Further, the member 110A is placed on the wiring substrate 120 while the peripheral portion of the wiring substrate 120 is inserted into the substrate insertion slit portion 111S of the substrate surrounding portion 111, and the member 110A and the member 110B are engaged with each other and fixed to each other. . Thus, the energization control apparatus 100 of the first embodiment is completed.

( Reference form 1 )
Next, Reference Embodiment 1 will be described with reference to FIGS.
In the energization control device 100 according to the first embodiment described above, a large number of check pins 152 are arranged in the metal block arrangement region 126 on the upper surface 120S of the wiring board 120. On the other hand, the energization control apparatus 200 according to the first embodiment is different in that the U-shaped metal plate member 253 is provided on the lower surface 220R side of the wiring board 220 without using the check pin 152, and the others are the embodiments. Same as 1. Therefore, different parts will be mainly described, and description of similar parts will be omitted or simplified.

In the energization control device 200 according to the first embodiment , as can be understood from FIGS. 7 and 8B, a U-shaped U-shaped metal is formed so as to surround the power control element 141 on the lower surface 220R side of the wiring board 220. A plate member 253 is provided. The U-shaped metal plate member 253 includes two parallel connecting portions 253A1 and 253A2 and a separating portion 253B located between them. Among these, the coupling portions 253A1 and 253A2 are coupled to the wiring board 220 so as to abut against the lower surface 220R of the wiring board 220, respectively. Further, the separation portion 253 </ b> B is arranged so that the power control element 141 is positioned between the separation substrate 253 </ b> B and the wiring board 220.
The U-shaped metal plate member 253 is formed by punching and bending a metal plate (brass plate) having a higher thermal conductivity than the resin forming the case member 110 by press molding, and forming a U-shape. It is plated.

  As shown in FIG. 9B, a rectangular element mounting region 221 is formed on the lower surface 220R of the wiring board 220 by soldering and fixing the metal heat radiating portion 141M of the power control element 141, as in the first embodiment. There are four places. Further, these element mounting regions 221 and a portion including the connection region 222 that is located around these elements and connects them to each other constitute a lower surface element mounting metal layer 223 made of copper foil or the like provided on the lower surface 220R. is doing. For this reason, also in the element mounting area | region 221, the metal thermal radiation part 141M of the power control element 141 can be easily stuck by soldering (refer FIG.8 (b)).

  Further, on the outer side of the four element mounting regions 221, that is, around the element mounting region 221 located on the outer side, there are coupling portion insertion holes 224H through which parts (end portions) of the coupling portions 253A1 and 253A2 are respectively inserted. Is formed. Further, in the lower surface element mounting metal layer 223, a coupling region 224 that can be soldered is formed around the outer element mounting region 221 and around the coupling portion insertion hole 224H. Similarly, on the upper surface 220S of the wiring board 220, a coupling region 227 that can be soldered is formed around the coupling portion insertion hole 224H.

  Then, as shown in FIG. 8, a part of the coupling parts 253A1 and 253A2 of the U-shaped metal plate member 253 is in a state where a part (end part) of the coupling parts 253A1 and 253A2 is inserted into the coupling part insertion hole 224H. The bonding regions 224 and 227 are in close contact by soldering.

  Thus, when the power control element 141 generates heat due to energization of the glow plug GP1 or the like, the U-shaped metal plate member 253 passes through the coupling region 224 from the metal heat radiation portion 141M and the element mounting region 221 of the lower surface element mounting metal layer 223. Heat can be quickly transferred to the coupling portions 253A1 and 253A2 and further to the separation portion 253B. Accordingly, since a part of the heat generated in the power control element 141 can be reliably and quickly stored in the U-shaped metal plate member 253, the temperature rise of the power control element 141 during energization control can be delayed, The energization control apparatus 200 can be operated for a longer time. Further, if the energization control is completed in a shorter time than the time until the safety circuit of the power control element 141 is activated, the safety circuit in the power control element 141 is obtained by storing heat by the U-shaped metal plate member 253. Can be prevented.

In particular, in the first embodiment , the element mounting region 221 is formed of a solderable metal layer (lower surface element mounting metal layer 223), and the metal heat radiation portion 141M of the power control element 141 is soldered. The heat generated in the element 141 is further easily transferred to the metal layer of the element mounting region 221 and the coupling portions 253A1 and 253A2 of the U-shaped metal plate member 253 via the metal layer.
Similarly, the coupling region 224 is formed of a solderable metal layer (lower surface element mounting metal layer 223), and the coupling portions 253A1 and 253A2 of the U-shaped metal plate member 253 are soldered. Heat is further easily transferred to the metal layer of the coupling region 224 and the coupling portions 253A1 and 253A2 of the U-shaped metal plate member 253 via the metal layer.
Further, in the first embodiment , the element mounting region 221 on the lower surface 220R of the wiring board 220 and the coupling region 224 positioned around the lower surface 220R are configured by the lower surface element mounting metal layer 223 which is a common metal layer. Therefore, the heat generated in the power control element 141 is further transmitted to the coupling portions 253A1 and 253A2 of the U-shaped metal plate member 253 via the lower surface element mounting metal layer 223 including the element mounting area 221 and the coupling area 224. It has become easier.

Further, in the first embodiment , the U-shaped metal plate member 253 that is the separated heat storage member is disposed between the separated portion 253B and the lower surface 220R of the wiring board 220 on the lower surface 220R side of the wiring board 220. 141 was positioned. As a result, when the power control element 141 generates heat, the separation part 253B is directly heated by the infrared rays emitted from the power control element 141 to store heat. Further, even if the separation portion 253B is provided, there is an advantage that the mounting area of the circuit components 141 and 142 on the wiring board 220 is not reduced.

  Similarly to the first embodiment, the lower surface element mounting metal layer 223 extends in a bent manner and extends around the six battery voltage terminal insertion holes 228H arranged in a row to form a battery voltage terminal connection region 228R. The battery voltage terminal 131 is soldered to the battery voltage terminal connection region 228R, and the battery voltage Vb is applied. Therefore, the battery voltage terminal 131 is electrically connected to the metal heat radiating portion 141M of the power control element 141 through the lower surface element mounting metal layer 223.

  Further, as in the first embodiment, the external connection terminal connection regions 229R and 229S in which the metal layer is exposed at the peripheral portions of the 12 external connection terminal insertion holes 229H arranged in two rows of the lower surface 220R and the upper surface 220S. Are formed respectively. These are regions where other external connection terminals 132 are fixed by soldering, as can be seen with reference to FIG.

In addition to the power control element 141, other circuit components 142 are mounted on the lower surface 220 </ b> R and the upper surface 220 </ b> S of the wiring board 220, and pads and the like for mounting these are formed. Description is omitted.
Also in the first embodiment , the lower surface 220R and the upper surface 220S of the wiring board 220 are provided with an element mounting region 221 and a coupling region 224 in the lower surface element mounting metal layer 223 in order to prevent corrosion and scratches on the metal layer and to prevent solder adhesion. , 227 (peripheral portion of the coupling portion insertion hole 224H), the peripheral portion of the battery voltage terminal insertion hole 228H, the external connection terminal connection regions 229R and 229S, and the pad portion for mounting the circuit component 142 (not shown), It is covered with a resist (not shown).

Energization control apparatus 200 of the present reference embodiment 1 is manufactured in much the same way as the energization control apparatus 100 of Embodiment 1. However, the check pin 152 is not used. Further, as described above, the U-shaped metal plate member 253 is formed by punching and bending a metal plate (brass plate) by press molding and performing tin plating. When the battery voltage terminal 131 and the other external connection terminal 132 are attached to the wiring board 220 by soldering, the joint portions 253A1 and 253A2 of the U-shaped metal plate member 253 are soldered to the joint regions 224 and 227, respectively.

( Reference form 2 )
Next, Reference Embodiment 2 will be described with reference to FIGS.
In the energization control device 200 according to the reference embodiment 1 described above, the U-shaped metal plate member 253, which is a separated heat storage member, is provided on the lower surface 220R side of the wiring board 220. Separately, the same as in the first embodiment. A battery voltage terminal 131 was provided.
In contrast, in the electrification control apparatus 300 of the present reference embodiment 2, a metallic plate member 353 is spaced heat storage member, except that there was one member also serves as the battery voltage terminal 331, the other is the same as Reference Embodiment 1 is there. Therefore, the description will focus on the differences from the first embodiment and the reference embodiment 1, and the description of similar parts will be omitted or simplified.

As can be understood from FIGS. 10 and 11B, the permeability control device 300 according to the second embodiment includes a metal plate member 353 on the lower surface 320 </ b> R side of the wiring board 320. The metal plate member 353 includes the coupling portions 353A1, 353A2, and 353A3 that surround the four power control elements 141 from three sides, and the separation portion 353B that is separated from and connects the lower surface 320R, and the wiring substrate 320 side from the separation portion 353B. It includes a connection terminal portion 353C that serves as the battery voltage terminal 331. Of these, the coupling portions 353A1, 353A2, and 353A3 extend in parallel to each other and are coupled to the wiring board 320 so as to abut against the lower surface 320R of the wiring board 320, respectively. Further, the separation portion 353 </ b> B is disposed so that the power control element 141 is positioned between the separation substrate 353 </ b> B and the wiring substrate 320. This metal plate member 353 is also formed by stamping and bending a metal plate (brass plate) having a higher thermal conductivity than the resin forming the case member 110 by press molding, and is plated with tin.

As shown in FIG. 12B, on the lower surface 320R of the wiring board 320, a rectangular element mounting region for soldering and fixing the metal heat radiation portion 141M of the power control element 141 as in the first embodiment and the first embodiment. Four locations 321 are provided. Further, these element mounting regions 321 and a portion including the connection regions 322 located around these elements and connecting them to each other constitute a lower surface element mounting metal layer 323 made of copper foil or the like provided on the lower surface 320R. is doing. For this reason, also in the element mounting region 321, the metal heat radiation part 141M of the power control element 141 can be easily adhered by soldering.

  Further, of the four element mounting regions 321, a part (end portion) of the coupling portions 353 A 1 and 353 A 2 is formed around the outer periphery of the element mounting region 321 located outside, and the element mounting region 321 positioned inside is arranged. A coupling part insertion hole 324H for inserting a part (end part) of the coupling part 353A3 is formed around the coupling part 353A3. In addition, in the lower surface element mounting metal layer 323, a coupling region 324 that can be soldered is formed around the element mounting region 321 and around the coupling portion insertion hole 324H. Similarly, on the upper surface 320S of the wiring board 320, a coupling region 327 that can be soldered is formed around the coupling portion insertion hole 324H.

  Then, as shown in FIG. 11, one of the coupling portions 353A1, 353A2, and 353A3 of the metal plate member 353 is inserted in a state in which a part (end portion) of the coupling portions 353A1, 353A2, and 353A3 is inserted into the coupling portion insertion hole 324H. The portions are in close contact with the coupling regions 324 and 327 by soldering.

Further, the separation portion 353B of the metal plate member 353 is connected to the connection terminal portion 353C. The connection terminal portion 353C is a portion that functions as the battery voltage terminal 331, and the shape of the portion located in the connector portion 112A of the case member 110 is the same shape.
However, unlike the first embodiment and the first embodiment, the wiring board 320 is not provided with the battery voltage terminal connection regions 128R and 228R, and the connection terminal portion 353C, the separation portion 353B, and the coupling portions 353A1 and 353A2 of the metal plate member 353. , 353A3, the battery voltage Vb is applied to the coupling region 324 of the lower surface element mounting metal layer 323.

  Thus, when the power control element 141 generates heat due to energization to the glow plug GP1 or the like, the coupling of the metal plate member 353 from the metal heat radiation portion 141M and the element mounting area 321 of the lower surface element mounting metal layer 323 through the coupling area 324 is performed. Heat can be quickly transferred to the portions 353A1, 353A2, and 353A3, and further to the separation portion 353B and the connection terminal portion 353C. Therefore, since a part of the heat generated in the power control element 141 can be reliably and quickly stored in the metal plate member 353, the temperature rise of the power control element 141 during the energization control can be delayed, and the energization control Device 300 can be operated for a longer time. Further, if the energization control is completed in a shorter time than the time until the safety circuit of the power control element 141 is activated, the heat storage by the metal plate member 353 is performed, whereby the operation of the safety circuit in the power control element 141 is performed. Can be prevented.

In the second embodiment , as in the first embodiment , the element mounting region 321 is formed by a solderable metal layer (lower surface element mounting metal layer 323), and the metal heat radiation portion 141M of the power control element 141 is soldered. Therefore, the heat generated in the power control element 141 can be more easily transferred to the metal layer of the element mounting region 321 and the coupling portions 353A1, 353A2, and 353A3 of the metal plate member 353 via the metal layer.
Similarly, the coupling region 324 is formed of a solderable metal layer (lower surface element mounting metal layer 323), and the coupling portions 353A1, 353A2, and 353A3 of the metal plate member 353 are soldered. Heat is further easily transferred to the metal layer of the coupling region 224 and the coupling portions 353A1, 353A2, and 353A3 of the metal plate member 353 via the metal layer.
Furthermore, the element mounting region 321 on the lower surface 320R of the wiring board 320 and the coupling region 324 located around the lower surface 320R are configured by a lower surface element mounting metal layer 323 which is a common metal layer. Therefore, the heat generated in the power control element 141 is further transferred to the coupling portions 353A1, 353A2, and 353A3 of the metal plate member 353 via the lower surface element mounting metal layer 323 including the element mounting area 321 and the coupling area 324. It has become easier.

Further, also in the present embodiment 2 , the power control element 141 is disposed between the separation portion 353B and the lower surface 320R of the wiring board 320 on the lower surface 320R side of the wiring board 320. Arranged to be located. Thereby, when the power control element 141 generates heat, the separation part 353B is directly heated by the infrared rays emitted from the power control element 141 to store heat. Further, there is an advantage that the mounting area of the circuit components 141 and 142 on the wiring board 320 is not reduced even if the separation portion 353B is provided.

Further, in the energization control device 300 of the second embodiment , the metal plate member 353 also serves as the battery voltage terminal 331. Accordingly, in the energization control device 300, the metal plate member 353 temporarily stores heat, and via the connection member of the battery BT connected to the battery voltage terminal 331 (connection terminal portion 353C) that is also used, It is also possible to release heat to the outside. For this reason, in this energization control apparatus 300, the temperature rise of the power control element 141 can be further delayed, and energization control for a longer time can be performed.

In particular, in the energization control device 300 of the second embodiment , the metal plate member 353 includes the battery voltage terminal 331 that is the external connection terminal through which the largest current flows among the external connection terminals 331 and 132 used in the energization control device 300. Also serves as. In other words, the metal plate member 353 also serves as the battery voltage terminal 331 that is the external connection terminal having the largest cross-sectional area of the current flowing portion of the external connection terminals 331 and 132 used in the energization control device 300.
Thus, by making the metal plate member 353 also serve as the battery voltage terminal 331 among the external connection terminals 331 and 132, a large amount of heat can be stored and heat can be easily released to the outside.

Further, as in the first embodiment and the first embodiment , the external connection terminal connection in which the metal layer is exposed at the peripheral portions of the twelve external connection terminal insertion holes 329H arranged in two rows of the lower surface 320R and the upper surface 320S. Regions 329R and 329S are respectively formed. These are regions where other external connection terminals 132 are fixed by soldering, as can be seen with reference to FIG.

In addition to the power control element 141, other circuit components 142 are mounted on the lower surface 320 </ b> R and the upper surface 320 </ b> S of the wiring board 320, and pads and the like for mounting these are formed. Description is omitted.
Also in the second embodiment , the lower surface 320R and the upper surface 320S of the wiring board 320 are provided with an element mounting area 321 and a coupling area 324 in the lower element mounting metal layer 323 in order to prevent corrosion and scratches on the metal layer and to prevent solder adhesion. , 327 (peripheral edge of the coupling portion insertion hole 324H), external connection terminal connection regions 329R and 329S, and a pad portion for mounting the circuit component 142 (not shown) are covered with a solder resist (not shown). .

The energization control device 300 according to the second embodiment is manufactured in substantially the same manner as the energization control device 200 according to the first embodiment . However, as described above, the metal plate member 353 also serving as the battery voltage terminal 331 is stamped and bent by press forming a metal plate (brass plate), tin-plated, and the member 110B forming the case member 110 is injected. At the time of molding, it is integrated with this. Thereafter, when other external connection terminals 132 are attached to the wiring board 320 by soldering, the joint portions 353A1, 353A2, and 353A3 of the metal plate member 353 (battery voltage terminal 331) are simultaneously soldered to the joint regions 324 and 327, respectively. Attach.

(Modification 1)
Next, a modification of the above-described reference embodiment 2 according to the present invention will be described with reference to FIG.
In the energization control apparatus 300 according to the above-described reference embodiment 2 , the wiring board 320 is only disposed in the board surrounding portion 111 of the case member 110, and the other is space (air) (see FIG. 10). .
On the other hand, the energization control device 400 of the first modification differs in that the wiring board 320 is arranged in the board surrounding portion 111 of the case member 110 and the resin filler 461 is further filled. It is the same as Reference form 2 . Therefore, the description will focus on the parts different from the reference embodiment 2, and the description of the same parts will be omitted or simplified.

As can be seen by comparing FIG. 13 with FIG. 10, in the energization control device 400 of the first modification, the power control element 141, other circuit components 142, and the metal plate member 353 are provided in the substrate surrounding portion 111 of the case member 110. And the like, and a resin filler 461 made of an epoxy resin having an insulating property and rubber-like elasticity is filled.
For this reason, in this energization control device 400, the power control element 141 and other circuit components 142 are surrounded and sealed by the resin filler 461, so that even if moisture enters the case member 110, these are controlled. It is possible to prevent problems such as migration, insulation failure, short circuit, and corrosion in the circuit components 141 and 142 and the metal layer in the wiring board 320.

  However, when the resin filler 461 is filled in the substrate surrounding portion 111 and the power control element 141 and the like are surrounded by the resin filler 461 in this way, the power control element 141 generates heat by energization control of the glow plug GP1 and the like. In addition, heat dissipation from the power control element 141 itself may be suppressed by the resin filler 461.

However, the energization control device 400 according to the first modification includes the metal plate member 353 having a higher thermal conductivity than the resin filler 461 as in the second embodiment . For this reason, when the power control element 141 generates heat by energizing the glow plug GP1 or the like, the metal heat radiation part 141M and the metal plate member 353 from the element mounting region 321 of the lower surface element mounting metal layer 323 through the coupling region 324. Heat can be quickly transferred to the coupling portion 353A1 and the like, and further to the separation portion 353B and the connection terminal portion 353C (see FIGS. 11 and 12). In this way, a part of the heat generated in the power control element 141 can be reliably and quickly stored in the metal plate member 353, so that the temperature rise of the power control element 141 during energization control can be delayed, The controller 400 can be operated for a longer time. Alternatively, if the energization control is completed in a shorter time than the time until the safety circuit of the power control element 141 operates, the heat storage by the metal plate member 353 prevents the operation of the safety circuit in the power control element 141. be able to.

  Further, in the energization control device 400 of the first modification, the metal plate member 353 also serves as the battery voltage terminal 331. For this reason, heat is released to the outside via the connection member of the battery BT connected to the battery voltage terminal 331 (connection terminal portion 353C) that is also used, and the temperature rise of the power control element 141 is further delayed. Can do.

In the energization control device 400 of the first modification, the energization control device 300 of the reference embodiment 2 is manufactured, and an uncured resin is discharged from the vent hole 111H of the case member 110 while discharging air from an air vent hole (not shown). The filler 461 is injected and then cured.

In the above, the present invention has been described according to the first embodiment and the first modified embodiment . However, the present invention is not limited to the first embodiment and the first modified embodiment, and may be appropriately changed without departing from the gist thereof. Needless to say, this is applicable.
For example, in the energization control device 100 of the first embodiment, the area of the portion that is in close contact with the metal lump arrangement region 126 is smaller than the metal heat radiation portion 141M of the power control element 141, and a large number of constricted check pins 152 are used. An example is shown.
However, the metal mass to be arranged in the metal mass arrangement region is not limited to the check pin 152. For example, instead of the check pin 152, the area of the portion in close contact with the metal mass arrangement region 126 is approximately the same. A rectangular parallelepiped metal lump can also be used. By using this metal lump, the heat capacity of the metal lump increases, so that the temperature rise of the power control element 141 can be further delayed.
Alternatively, it is also possible to use a metal lump whose area close to the metal lump arrangement region 126 is the same size as the metal heat radiation part 141M of the power control element 141 or a plurality of sizes.

In the reference mode 1 , the U-shaped metal plate member 253, which is a separated heat storage member, is located on the lower surface 220R side of the wiring board 220, and the power control element 141 is positioned between the separated portion 253B and the lower face 220R of the wiring board 220. Arranged to be. However, the U-shaped metal plate member 253 may be disposed with the coupling portions 253A1 and 253A2 in close contact with the coupling region 227 formed on the upper surface 220S of the wiring board 220 using the coupling portion insertion hole 224H. Even in this case, the heat generated in the power control element 141 is transmitted to the coupling portions 253A1 and 253A2 of the U-shaped metal plate member 253 through the coupling region 224 of the lower surface element mounting metal layer 123, and the U-shaped metal plate member 253 stores heat. can do. A metal layer 226 is provided on the upper surface 220 </ b> S of the wiring board 220. The metal layer 226 includes a device mounting reverse surface region 225 facing the device mounting region 221 and a coupling region 227, which are indicated by broken lines in FIG. Therefore, the U-shaped metal plate member 253 can also transmit the heat generated in the power control element 141 to the coupling portions 253A1 and 253A2 through the metal layer 226 including the element mounting region 221 and the element mounting reverse surface region 225.

Similarly, in the reference mode 2 , the power control element 141 is disposed between the separation portion 353B and the lower surface 320R of the wiring board 320 on the lower surface 320R side of the wiring board 320. Arranged to be located. However, an element mounting region may be provided in the metal layer 326 (see FIG. 12) on the upper surface 320S of the wiring board 320, and the power control element 141 may be disposed here. Even in this case, the heat generated in the power control element 141 can be transmitted to the coupling portion 353A1 of the metal plate member 353 through the coupling region 327 of the metal layer 326 and stored in the metal plate member 353.

In the reference forms 1 and 2 , the U-shaped metal plate member 253 or the metal plate member 353 is used instead of the check pin 152 used in the first embodiment, but the check pin 152 is used together with these. Also good.
Further, in the first modification, the example in which the resin filler 461 is filled in the entire substrate surrounding portion 111 of the case member 110 has been shown, but the resin filler is applied only to appropriate portions such as surrounding the power control element 141n. It can also be arranged.
Further, in the energization control devices 100 and 200 according to the first embodiment and the reference embodiment 1 , a resin filler may be filled in the substrate surrounding portion 111 of the case member 110.

Embodiment 1 The external shape of the electricity supply control apparatus which concerns on reference form 1 , 2 and the modification 1 is shown, (a) is a front view, (b) is the side view seen from the connector part side. 1 is a circuit diagram of an energization control system for a glow plug including an energization control device according to Embodiment 1 , Reference Embodiments 1 and 2 and Modification 1; FIG. It is a fragmentary sectional view which shows the internal structure of the electricity supply control apparatus which concerns on Embodiment 1. (A) is a top view and (b) is a bottom view in the wiring board in the state where the circuit components etc. in the energization control device concerning Embodiment 1 were mounted. FIG. 4A is a top view and FIG. 2B is a bottom view of a wiring board in a state where circuit components and the like are not mounted in the energization control apparatus according to the first embodiment. (A) of the power control element used in each embodiment is a perspective view, (b) is a rear view. It is a fragmentary sectional view which shows the internal structure of the electricity supply control apparatus which concerns on the reference form 1 . (A) is a top view and (b) is a bottom view in the wiring board in the state where the circuit components etc. in the energization control device concerning reference form 1 were mounted. FIG. 4A is a top view and FIG. 2B is a bottom view of a wiring board in a state where circuit components and the like are not mounted in the energization control apparatus according to Reference Embodiment 1 . It is a fragmentary sectional view which shows the internal structure of the electricity supply control apparatus which concerns on the reference form 2 . (A) is a top view and (b) is a bottom view in the wiring board in the state where the circuit components etc. in the energization control device concerning reference form 2 and modification 1 were mounted. FIG. 5A is a top view and FIG. 5B is a bottom view of a wiring board in a state where circuit components and the like are not mounted in the energization control device according to Reference Mode 2 and Modification Mode 1. FIG. It is a fragmentary sectional view which shows the internal structure of the electricity supply control apparatus which concerns on the modification 1.

1 Glow plug energization control system GP1, GP4 Glow plug (heater for preheating diesel engine)
BT battery 2 control circuit 100, 200, 300, 400 Energization control device (energization control device for diesel engine preheating heater)
110 Case members 120, 220, 320 Wiring boards 120S, 220S, 320S Upper surface (the other surface)
120R, 220R, 320R Lower surface (one surface)
121, 221, 321 Element mounting area 123, 223, 323 Lower surface element mounting metal layer 224, 324 (on the lower surface side) coupling area 125, 225 Element mounting reverse surface area 126 Metal block arrangement area 128 R, 228 R (lower surface side) battery Voltage terminal connection region 129R, 229R, 329R (on the lower surface side) external connection terminal connection region 131, 331 Battery voltage terminal (external connection terminal)
132 Other external connection terminals 133G1, 133G4 Glow plug connection terminals (external connection terminals)
134 Grounding terminal (external connection terminal)
135A, 135B ECU communication terminal (external connection terminal)
136 Power supply terminal (external connection terminal)
141 Power control element 141M Metal heat radiation part 142 Other circuit components 152 Check pin (temperature rise delay means, metal lump)
253 U-shaped metal plate member (temperature rise delay means, spaced heat storage member)
253A1, 253A2 coupling portion 253B separation portion 353 metal plate member (temperature rise delay means, separation heat storage member)
353A1, 353A2, 353A3 coupling portion 353B separation portion 353C connection terminal portion 461 resin filler

Claims (4)

A circuit component that includes a power control element and forms at least a part of a control circuit that controls electric power applied to the diesel engine preheating heater;
A wiring board made of resin or a composite material containing resin,
A wiring board in which the circuit component including the power control element is mounted on both sides of the circuit board;
While restricting the circulation of the air around the power control element to the outside, at least the resin case member surrounding the power control element, or at least the power control element is filled around the power control element. At least one of resin fillers surrounding
A temperature rise that is arranged around the power control element, has higher thermal conductivity than the case member and the resin filler, temporarily stores heat generated by the power control element, and delays the temperature rise of the power control element possess a delay means, the,
The energization control device for a diesel engine preheating heater, wherein the temperature rise delay means is a large number of metal blocks of the same shape mounted on the wiring board . An energization control device for a diesel engine preheating heater according to claim 1,
The power control element is
It is made of metal and has a metal heat radiating part for releasing the heat generated by itself to the outside.
The metal heat dissipating part is mounted in close contact with the element mounting region of one side of the wiring board,
A large number of the above-mentioned metal masses having the same shape as the temperature rise delay means,
Of the opposite other surface is the above one surface of the wiring board, for diesel engines preheating is gold Shokukatamari disposed in close contact with the metal block arrangement region including an element mounting surface opposite region opposite to the element mounting area Heater energization control device. An energization control device for a diesel engine preheating heater according to claim 1 or 2,
The power control element is
It is made of metal and has a metal heat radiating part for releasing the heat generated by itself to the outside.
The metal heat dissipating part is mounted in close contact with the element mounting region of one side of the wiring board,
The temperature rise delay means is in the same shape in addition to a number of the metal masses,
A heat storage member made of metal,
A spaced-apart portion disposed away from the one surface of the wiring board or the other surface opposite to the one surface;
A coupling portion connected to the wiring board in a coupling region connected to the separation portion and around the device mounting region or around the device mounting reverse surface region of the other surface facing the device mounting region. And an energization control device for a diesel engine preheating heater, which is a separated heat storage member. An energization control device for a diesel engine preheating heater according to claim 3,
The spaced heat storage member is
An energization control device for a diesel engine preheating heater that also serves as an external connection terminal.

Images