JP7246020B2 - power supply - Google Patents

Description

The present invention relates to a power supply device for charging storage batteries.

Electric vehicles such as electric vehicles (EV) and plug-in hybrid vehicles (PHV) have storage batteries as power supply sources. In order to charge this storage battery, it is charged using a charging stand installed outside (home or commercial facility). In the charging station, there is an electrical junction box containing a circuit board with relays mounted thereon for supplying power to the storage battery.

A relay generates heat as it is energized. In order to dissipate the generated heat, in Patent Document 1, a heat conducting member is arranged in contact with the leg of the relay. The heat-dissipating member is made of a metal member and is composed of a heat-absorbing portion that absorbs heat generated from the relay and a heat-dissipating portion that transfers the absorbed heat.

JP 2012-165567 A

By the way, the heat dissipating member described in Patent Document 1 has a heat dissipating plate partially exposed to the outside of the electric connection box, and a heat dissipating portion is attached to the heat dissipating plate in a heat conductive manner. Thereby, the heat sink dissipates the heat generated when the relay is energized to the outside of the electric connection box. If the heat sink is exposed to the outside of the housing in this way, there is a possibility that the user, etc., will accidentally touch the heat sink, which could lead to an undesired short circuit between the relay terminals, resulting in a malfunction. rice field.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply device that is less likely to fail.

A power supply device according to the present invention is a power supply device that outputs power for charging a storage battery used as a power source of a mobile body via a relay having a relay terminal, wherein the heat conduction member is in contact with the relay terminal; A housing that accommodates the relay and the thermally conductive member therein is provided. A plurality of the heat conducting members are provided. An insulating member is provided between the plurality of heat conducting members.

The power supply device according to the present invention can provide a power supply device that is less likely to fail.

1 is an overall perspective view of a power supply device according to a first embodiment; FIG. 3 is an exploded perspective view of the main body of the power supply device according to the first embodiment; FIG. FIG. 2 is a cross-sectional view of the inner box of the power supply device according to the first embodiment, taken along the line AA. 1 is a circuit diagram of a power supply device according to a first embodiment; FIG. It is a BB cross-sectional view of the inner box of the power supply device according to the first embodiment. 3 is a perspective view of a heat sink of the power supply device according to the first embodiment; FIG. It is the perspective view which opened the 1st cover part of the inner case of the electric power supply apparatus which concerns on 1st embodiment. It is the front view which opened the 1st cover part of the inner case of the electric power supply apparatus which concerns on 1st embodiment. It is a BB cross-sectional view of the inner case of the power supply device according to the second embodiment.

Power supply device 100 of this embodiment outputs power for charging storage battery 107 used as a power source of mobile body 106 via relay 170 having relay terminals 171 and 172, A heat conducting member 180 abutting on the relay terminals 171 and 172 and a housing 110 accommodating the relay 170 and the heat conducting member 180 are provided.

Hereinafter, embodiments of a power supply device according to the present disclosure will be described based on the drawings. It should be noted that the embodiments disclosed below are all examples, and are not intended to limit the power supply device according to the present disclosure.

Moreover, in the embodiments disclosed below, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the description, thereby facilitating the understanding of those skilled in the art.

(First embodiment)
As shown in FIG. 1, a power supply device 100 according to the first embodiment is attached to a predetermined construction surface 102 of a pole 109 for attaching this power supply device 100 . pole 1
09 is attached substantially vertically to the ground. The power supply device 100 includes a body portion 101 , a plug portion 103 , a power line 104 connecting the body portion 101 and the plug portion 103 , and a holding portion 1 .
05. In this embodiment, the rear surface of the power supply device 100 is attached to the dedicated pole 109, but it can also be attached to a construction surface such as a building wall or a pillar, for example.

Main unit 101 outputs electric power for charging storage battery 107 that is used as a power source for mobile object 106 . The input side of the main unit 101 is connected to the power system 108 via the wiring 200 . This power system 108 is used for the power output from the main unit 101 to the storage battery of the moving body 106 .
AC power supplied from is used.

The plug part 103 can be connected to the charging port of the storage battery 107 . Main unit 101 outputs electric power for charging while plug unit 103 is connected to the charging port of storage battery 107 , thereby charging storage battery 107 with the electric power through plug unit 103 . The holding portion 105 holds the plug portion 103 when not in use.

The moving body 106 has a storage battery 107 and moves using the electric energy charged in the storage battery 107 . The moving object 106 is, for example, an electric vehicle (EV), a plug-in hybrid vehicle (PHEV) that runs by combining the output of an engine and the output of an electric motor, a fuel cell vehicle (
FCV), electric carts, electric motorcycles, electric tricycles, and four-wheeled buggies. Electric two-wheeled vehicles include motorcycles, electric motorcycles, and electrically assisted two-wheeled vehicles. Electric tricycles include electric motorcycles and electrically assisted tricycles. Furthermore, the mobile object 106 can be a drone,
Air vehicles such as aircraft are also included, and are not particularly limited.
(Body)
As shown in FIG. 2, the main body 101 is composed of an inner box 110 (housing) and an outer box 130 in a double box, and is made of resin, for example. In particular, since the inner box 110 accommodates heat-generating components such as a relay 170 to be described later, it is preferably made of a highly heat-resistant resin such as polyethylene, polypropylene, polycarbonate, polyphenylene sulfide, polyvinylidene chloride, etc., but is not particularly limited. do not have. The inner box 110 includes a first body portion 111 and a first lid portion 112 . The outer box 130 includes a second body portion 131 and a second lid portion 132 and accommodates the inner box 110 .

The first body portion 111 is formed in a box-like shape having a first opening portion 113 with one end face open, and has a substantially rectangular first bottom plate 114 and an opening from the periphery of the first bottom plate 114 to the first bottom plate 114 . Four substantially vertically extending side plates, that is, a first left side plate 115, a first right side plate 116, and a first upper side plate 117
, and the first lower plate 118 .

In this embodiment, unless otherwise specified, the back side of the power supply device 100 is the rear side and the front side is the front side, with the main body attached to a pole. Also, the vertical direction with respect to the ground is defined as the up-down direction, and the left-right direction as viewed from the front side of the power supply device 100 is defined as the left-right direction.

The first body portion 111 can accommodate the first substrate 150 and the second substrate 151 in the inner space.

Further, the first main body portion 111 includes a first left side plate 115, a first right side plate 116, and a first upper side plate 117.
, a first flange 119 extending outward (on the outer peripheral side of the first body portion 111) from the edge forming the first opening 113 of the first lower plate 118, respectively.

A first flange 119 extending from the first upper plate 117 and a first flange extending from the first lower plate 118
The flange 119 is provided with a first screw hole 121 for fixing the first lid portion 112 with a screw. The number of first screw holes 121 is one, but may be two or more and is not particularly limited. Also, the first screw holes 121 may be provided in other flanges extending from the side plates 115 and 116 .

The first lid portion 112 has a box shape with an opening, a substantially rectangular second bottom plate 122, and four side plates extending substantially perpendicularly to the second bottom plate 122 from the periphery of the second bottom plate 122, that is, It consists of a second left plate 123 , a second right plate 124 , a second upper plate 125 and a second lower plate 126 .

The first lid portion 112 extends outward from the edges forming the openings of the second left side plate 123, the second right side plate 124, the second upper side plate 125, and the second lower side plate 126 (the outer peripheral side of the first lid portion 112). A second flange 127 is provided that extends to. The second flange 127 has approximately the same size as the first flange (
or slightly smaller) and shape.

A second flange 127 extending from the second upper plate 125 and a second flange extending from the second lower plate 126
The flange 127 is provided with a notch 129 for connecting the first lid portion 112 to the first flange 119 of the first body portion 111 with screws. By adopting such a structure, the first lid portion 112 can be detachably attached to the first opening portion 113 and can seal the inside of the first main body portion 111 . In addition, when sealing, a packing (not shown) is sandwiched between the first body portion 111 and the first lid portion 112 to improve the waterproof performance.

Lengths in the front-rear direction of the first left side plate 115 and the first right side plate 116 (depth of the first main body portion 111)
is designed to be longer than the longitudinal length of the second left side plate 123 and the second right side plate 124 (the depth of the first lid portion). It has a box shape with a deeper dimension than 112 . A peripheral wall rises from the outer periphery of the first flange 119, and the length of the peripheral wall in the front-rear direction is substantially the same as the length of the first cover portion 112 in the front-rear direction.
A first lid 112 can be housed within the flange 119 . Therefore, the first body portion 1
11 and the first lid portion 112 (the mating surface of the first flange 119 and the second flange 128) is formed inside the first main body, the waterproof performance can be enhanced.

The second main body portion 131 of the outer box 130 is formed in a box shape having a second opening portion 133 with one end face open, and has a substantially rectangular third bottom plate 134 and a peripheral edge of the first bottom plate 134 to the first bottom plate. 134
Up, down, left and right four side plates extending substantially perpendicularly to the third left side plate 135 and the third right side plate 13
6, a third upper plate 137 and a third lower plate 138; The outer surface of the third bottom plate 134 corresponds to the rear surface of the power supply device 100 and is brought into contact with the construction surface 102 described above.

The inner box 110 is oriented so that the first lid portion 112 side faces the third bottom plate 134 side of the second body portion 131 with the first lid portion 112 covering the first opening portion 113 . 131 and attached to the third bottom plate 134 of the outer box. The inner box 110 is sealed with the outer box 130 by covering the second opening 133 with the second lid 132 . Moreover, when sealing, a packing (not shown) is sandwiched between the second main body portion 131 and the second lid portion 132 to improve the waterproof performance.

As shown in FIG. 2, the size of the inner box 110 in the vertical direction is about two-thirds the size of the outer box 130, and is attached to the outer box 130 while being moved upward. Therefore, a space is formed under the outer case 130 . In this space, a power line terminal block 140, which will be described later, and power lines 104 and wires 200 connected to the power line terminal block 140 are accommodated.

As shown in FIG. 3, the first body portion 111 of the inner box 110 accommodates a first substrate 150 and a second substrate 151 which are formed in a substantially rectangular plate shape in plan view, and a power line terminal block 140 (FIG. 2). ) is provided outside the first lower plate 118 side. The second substrate 151 is mounted with electronic components such as a control circuit (control unit 160) and a communication circuit mainly composed of a computer system including a memory and a processor. toward 113, the first bottom plate 11
A screw is passed through a first board screw hole 154 formed at 4 and fixed. The first substrate 150 is arranged directly above the second substrate 151 (on the first opening 113 side).

The first board 150 is a hard board whose base material is glass epoxy resin, and electronic components such as a power supply circuit (FIG. 5), at least two relays 170, and a heat conducting member 180 are mounted. The first substrate 150 is fixed to the first main body portion 111 with the substrate surface on which the electronic components, the relay 170 and the heat conducting member 180 are arranged facing the first opening portion 113 side.

As shown in FIG. 4, wiring 200 from power system 108 is connected to input section 1 of power line terminal block 140 .
57 and the power line 104 is connected to the output 158 of the power line terminal block 140 .
An input portion 157 and an output portion 158 of the power line terminal block 140 are connected by a pair of power paths 159 , and two relays 170 are interposed in each of the pair of power paths 159 .

AC power supplied from the power system 108 is supplied to the input portion 157 of the power line terminal block 140 and the output portion 158 of the power line terminal block 140 via the relay 170, and the power line terminal block 14
0 to the mobile body 106 via the power line 104 and the plug portion 103 connected to the power line 104.
is supplied to the storage battery 107 of .

The power supply device 100 also includes a control unit 160 for opening and closing the relay 170 .
06 via a communication line 161, and the relay 170 is opened and closed according to a charge/discharge command from the moving body 106 side.

The relay 170 will be described below, but since the two relays 170 have the same configuration,
One relay 170 will be described.

The relay 170 has four contacts, two of the four first contacts 164 are connected to the power path 159 on the input section 157 side via the legs (first relay terminals 171) of the relay 170, respectively, The remaining two second contacts 165 are connected to the power path 159 on the output section 158 side via the legs of the relay 170 (second relay terminals 172).

The relay 170 includes a first switch 162 for opening and closing between one of the two first contacts 164 and one of the two second contacts 164, A second segment 16 for opening and closing between the other contact and the other of the two second contacts 165
3 and .

As shown in FIG. 5, the relay 170 has a rectangular box-shaped relay case 173 made of synthetic resin. The relay case 173 includes the contacts 164 and 165 and the segment 162 described above.
, 163, and a coil (not shown) for operating the segment, etc. are housed, forming a relay body.

The first relay terminal 171 and the second relay terminal 172 are formed in the shape of a metal bar and protrude vertically from a terminal projecting surface 175, which can also be called the bottom surface of the relay body.

As shown in FIG. 4, when the first segment 162 and the first segment 163 are in the ON state (conducting state), the power supply source (for example, the power system 108 or the solar power generation facility) is connected to the moving body 106 such as the EV. can supply electric power to the storage battery 107 of . On the other hand, the first segment 162 and the first
If the switch 163 is in an OFF state (interrupted state), power is not supplied from the power system 108 to the storage battery 107 to the moving body 106 .

As described above, the relay 170 only needs to be controllable by the control unit 160, and in this embodiment, a mechanical relay having mechanical contacts is used. The relay 170 may be a mechanical relay or a semiconductor relay without mechanical contacts, and is not particularly limited.

Relay 170 generates heat when electric power is supplied to storage battery 107 of moving body 106 (when energized), and if this heat generation is left unattended, pieces 162 and 163 of relay 170 are welded to remain closed. easier. A heat conducting member 180 is provided to dissipate heat from the relay 170 .

A heat conducting member 180 is provided to each of the two first relay terminals 171 and the two second relay terminals 172 . In the following description, the heat conducting member 180 provided on the first relay terminal 171 and the heat conducting member 180 provided on the second relay terminal 172 have the same configuration. , and the second relay terminal 172 simply referred to as relay terminal 1
It may be expressed as 71, 172.

As shown in FIG. 6, the thermally conductive member 180 is made of a plate-shaped pure copper, a copper alloy, or another highly thermally conductive metal, and has an L-shape when viewed from the side. L-shaped heat conducting member 18
0 is a single plate member that is bent to form a heat absorption part 181 (first heat conduction part) on one side and a heat dissipation part 1 on the other side.
It is utilized as 82 (second heat conducting portion). Note that the heat conducting member 180 may be made of a material having a high thermal conductivity, and may be made of other metals such as iron and aluminum, or other materials. Moreover, the heat radiation portion 182 does not necessarily have to be bent in a direction (90 degrees) substantially perpendicular to the side view, and may be 80 degrees or 95 degrees, and is not particularly limited.

The heat absorbing portion 181 abuts on the relay terminals 171 and 172 and absorbs heat generated when the relay 170 is energized. The heat radiating portion 182 radiates the heat absorbed by the heat absorbing portion 181 .

The heat absorbing portion 181 has an elongated flat plate shape and is provided between the relay body portion and the first substrate 150 .

As shown in FIG. 8, the heat-conducting member 180 includes the first relay terminals 171 of the two relays 170,
and the second relay terminal 172, respectively. At this time, the heat radiation part 182 is formed so as to extend along the first left side plate 115 or the first right side plate 116 .

The heat conducting member 180 will be described below.
Since the heat-conducting member 180 provided on the side has the same configuration, the heat-conducting member 180 provided on the first right side plate 116 side will be described.

The heat absorbing portion 181 is provided with through holes 183 through which the relay terminals 171 and 172 pass. It is preferable that the through-hole 183 has substantially the same size and shape as the diameter of the relay terminals 171 and 172 .

Although the through-hole 183 is rectangular in this embodiment, it may be circular, for example.
It is not particularly limited. By adopting such a structure, the relay terminals 171, 1
72 passes through the through hole 183 of the heat absorbing portion 181 and through the through hole of the first substrate 150 . At this time, the tips of the relay terminals 171 and 172 protrude from the rear surface of the first substrate 150 (the surface on which circuit components are not mounted), and are soldered to form the terminals of the relays 170 and 172.
The heat conducting member 180 is fixed to the first substrate 150 . By adopting such a structure,
The relay 170 and the heat conducting member 180 can be easily fixed to the first substrate 150 .

As shown in FIG. 7 , the heat radiation portion 182 is formed extending from the heat absorption portion 181 along the first left side plate 115 or the first right side plate 116 . In general, each component on the board needs to be spaced apart from each other to avoid short-circuiting. 1, there is no need to consider the distance to each part because it is provided along the left side plate 115. Therefore, it is not necessary to provide an extra space, and the miniaturization of the substrate can be expected.

Furthermore, as shown in FIG. 8, since the heat radiating portion 182 is arranged along the wall, even if the heat radiating portion 182 is extended, it is unlikely to interfere with other parts, and a large heat radiating area can be secured.

The height of the heat radiating portion 182 is formed to be shorter than the heights of the first left side plate 115 and the first right side plate 116 . Therefore, when the first main body portion 111 is covered with the first lid portion 112 , all the heat conducting members 180 in contact with the relay terminals 171 and 172 can be accommodated inside the inner box 110 . With such a configuration, even if the second lid portion 132 of the outer case 130 is opened when inspecting the power supply device 100, the heat-conducting member is accommodated in the inner case 110. A short circuit caused by touching the heat conducting member 180 can be prevented.

As shown in FIG. 8, when the relay 170 and the heat conducting member 180 are arranged on the first substrate 150, the heat conducting member 180 is arranged so as to fit within the relay 170 in the vertical direction.
By doing so, the mounting surface of the electronic components of the first substrate 150 can be widened, and the size of the substrate can be reduced.

As shown in FIG. 8, the heat conducting member 180 contacting the first relay terminal 171 and the heat conducting member 180 contacting the second relay terminal 172 are arranged adjacent to each other.

An insulating member 190 is provided in the gap between adjacent heat conducting members 180 . Insulating member 1
Reference numeral 90 denotes a part of the first left side plate 115 and the first right side plate 116 that extends and is formed integrally with the inner box 110 . Also, the thickness of the insulating member 190 is formed so as to be shorter than the gap between adjacent heat conducting members 180 . Furthermore, the height of the insulating member 190 is equal to that of the heat conducting member 1
It is formed to be higher than the height of 80.

Since the first relay terminal 171 and the second relay terminal 172 have different potentials, the heat conducting members 180 soldered to them also have different potentials. If these thermally conductive members 180 are arranged nearby, for example, when an earthquake occurs, the thermally conductive members 18 will suddenly become unusable.
0 may be shorted. By providing the insulating member 190 as described above,
Such a short circuit can be suppressed.

Note that the insulating member 190 does not necessarily have to be formed integrally with the first left side plate 115 and the first right side plate 116, and may be formed by separate members. For example, this separate member may be attached to the first left side plate 115 and the first right side plate 116 , or may be attached to the first substrate 150 . By adopting such a structure, another member can be attached later, so that the insulating member 190 does not become an obstacle when the first substrate 150 is arranged in the inner box, and the attachment can be easily performed.
(Second embodiment)
In the first embodiment, the heat radiating portion 182 is used without being bent, but as shown in FIG. The ends are folded and used. Specifically, it is folded. Although it is folded only once in the figure, it may be folded any number of times. At this time, it is preferable to form them in a substantially U-shape when viewed from the side. By adopting such a structure, the vertical length of the heat radiating portion 182 can be suppressed, and the heat radiating area can be increased. As a result, it is possible to further increase the heat dissipation capacity while maintaining the housing of the heat conducting member 180 in the inner case 110 .

REFERENCE SIGNS LIST 100 power supply device 101 main unit 102 construction surface 103 plug unit 104 power line 105 holding unit 106 moving body 107 storage battery 108 electric power system 109 pole 110 inner box (housing)
130 Outer box 150 First substrate 151 Second substrate 160 Control unit 170 Relay 171 First relay terminal 172 Second relay terminal 173 Relay case 175 Terminal projecting surface 180 Thermal conduction member 181 Heat absorbing unit 182 Heat radiating unit 183 Through hole

Claims (5)

In a power supply device that outputs power for charging a storage battery used as a power source of a mobile object via a relay having a relay terminal,
a thermally conductive member in contact with the relay terminal;
a housing that accommodates the relay and the heat conduction member inside ,
A plurality of the heat-conducting members are provided,
An electric power supply device , wherein an insulating member is provided between a plurality of said heat conducting members . A board for mounting the relay,
The heat-conducting member includes a first heat-conducting portion that is bent and arranged between the relay and the board and abuts against the relay terminal, and a second heat-conducting portion that is provided along the wall surface of the housing. 2. The power supply device according to claim 1, wherein . 3. The power supply device according to claim 1, wherein the insulating member is integrally formed with the housing. 3. The power supply device according to claim 2, wherein the end of the second heat conducting part is bent. The heat conducting member has a through hole,
3. The power supply device according to claim 2, wherein the relay terminal passing through the through-hole and the through-hole of the board is soldered to the board together with the heat conducting member.

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