JP2020167906A - Electric power supply device - Google Patents

Abstract

To provide an electric power supply device which is not easily broken.SOLUTION: An electric power supply device outputs electric power for charging a rechargeable battery 107 used as a power source of a movable body 106 through a relay 170 having a terminal of the relay 170 and includes: a heat conduction member 180 which contacts with the terminal of the relay 170; and a housing that houses the relay 170 and the heat conduction member 180.SELECTED DRAWING: Figure 5

Description

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

Electric vehicles such as electric vehicles (EVs) and plug-in hybrid vehicles (PHVs) have storage batteries as a power supply source. In order to charge this storage battery, it is charged using a charging stand installed outside (home or commercial facility). Inside the charging station, there is an electrical junction box that houses a circuit board on which a relay is mounted to power the storage battery.

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

Japanese Unexamined Patent Publication No. 2012-165567

By the way, the heat radiating member described in Patent Document 1 has a heat radiating plate whose part is exposed to the outside of the electric junction box, and the heat radiating portion is heat-transferredly attached to the heat radiating plate. As a result, the heat radiating plate dissipates the heat generated when the relay is energized to the outside of the electrical connection box. In this way, if the heat dissipation plate is exposed to the outside of the housing, the user or the like may accidentally touch the heat dissipation plate, which may cause a short circuit between the relay terminals in an undesired state and cause a failure. It was.

In view of the above problems, an object of the present invention is to provide a power supply device that is unlikely to break down.

The power supply device of 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, and includes a heat conductive member that abuts on the relay terminal. It includes a relay and a housing for accommodating the heat conductive member inside.

The power supply device according to the present invention can provide a power supply device that is unlikely to break down.

It is an overall perspective view of the power supply device which concerns on 1st Embodiment. It is an exploded perspective view of the main body part of the power supply device which concerns on 1st Embodiment. FIG. 5 is a sectional view taken along the line AA of the inner box of the power supply device according to the first embodiment. It is a circuit diagram of the power supply device which concerns on 1st Embodiment. It is BB sectional view of the inner box of the power supply device which concerns on 1st Embodiment. It is a perspective view of the heat radiation plate of the power supply device which concerns on 1st Embodiment. It is a perspective view which opened the 1st lid part of the inner box of the power supply device which concerns on 1st Embodiment. It is a front view which opened the 1st lid part of the inner box of the power supply device which concerns on 1st Embodiment. It is BB sectional view of the inner box of the power supply device which concerns on 2nd Embodiment.

The power supply device 100 of this embodiment is a power supply device 100 that outputs power for charging the storage battery 107 used as a power source of the mobile body 106 via a relay 170 having relay terminals 171 and 172. It includes a heat conductive member 180 that abuts on the relay terminals 171 and 172, and a housing 110 that houses the relay 170 and the heat conductive member 180 inside.

Hereinafter, embodiments of the power supply device according to the present disclosure will be described with reference to the drawings. It should be noted that all the embodiments disclosed below are examples, and there is no intention of limiting the power supply device according to the present disclosure.

Further, in the embodiment disclosed below, more detailed description than necessary may be omitted. For example, a detailed description of a well-known matter or a duplicate description of substantially the same configuration may be omitted. This is to facilitate the understanding of those skilled in the art by avoiding unnecessarily redundant explanations.

(First Embodiment)
As shown in FIG. 1, the power supply device 100 according to the first embodiment is attached to a predetermined construction surface 102 of a pole 109 for attaching the power supply device 100. Paul 1
09 is mounted substantially vertically to the ground. The power supply device 100 includes a main body 101, a plug 103, a power line 104 connecting the main body 101 and the plug 103, and a holding unit 1.
It is equipped with 05. In the present embodiment, the back 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 wall surface or a pillar of a building.

The main body 101 outputs electric power for charging the storage battery 107 used as a power source for the mobile body 106. The input side of the main body 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 body 101 to the storage battery of the mobile body 106.
AC power supplied from is used.

The plug portion 103 can be connected to the charging port of the storage battery 107. The main body 101 can charge the storage battery 107 via the plug 103 by outputting the electric power for charging while the plug 103 is connected to the charging port of the storage battery 107. The holding portion 105 holds the plug portion 103 when not in use.

The mobile body 106 has a storage battery 107, and moves using the electric energy charged in the storage battery 107. The moving body 106 is, for example, an electric vehicle (EV), a plug-in hybrid vehicle (PHEV) that travels by combining the output of an engine and the output of an electric motor, and a fuel cell vehicle (PHEV).
FCV), electric carts, electric motorcycles, electric tricycles, four-wheel buggies, etc. Electric motorcycles include motorcycles, electric motorcycles and electrically assisted motorcycles. Further, the electric tricycle includes an electric motorcycle and an electric assist tricycle. In addition, the mobile 106 is a drone,
Aircraft and other flying objects are also included, and are not particularly limited.
(Main 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, for example, resin. In particular, since the inner box 110 accommodates heat-generating parts such as a relay 170 described later, it is preferably a highly heat-resistant resin such as polyethylene, polypropylene, polycarbonate, polyphenylene sulfide, or polyvinylidene chloride, but it is not particularly limited. Absent. The inner box 110 includes a first main body portion 111 and a first lid portion 112. The outer box 130 includes a second main body portion 131 and a second lid portion 132, and houses the inner box 110.

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

In the present embodiment, the back side of the power supply device 100 is the rear side and the front side is the front side in the state where the main body is attached to the pole unless otherwise specified. Further, the vertical direction with respect to the ground is the vertical direction, and the left and right directions are the left and right directions when the power supply device 100 is viewed from the front side.

The first main 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 plate 117.
, A first flange 119 extending outward (outer peripheral side of the first main body 111) from an edge forming the first opening 113 of the first lower plate 118 is provided.

A first flange extending from the first upper plate 117 and a first 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 the first screw holes 121 is one each, but the number may be two or more and is not particularly limited. Further, the first screw hole 121 may be provided in the flange extending from the other side plates 115 and 116.

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

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

A second flange 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 main body portion 111 with a screw. By adopting such a structure, the first lid portion 112 can be detachably attached to the first opening 113, and the inside of the first main body portion 111 can be sealed. Further, when sealing, the waterproof performance is improved by sandwiching the packing between the first main body portion 111 and the first lid portion 112 (not shown).

The length of the first left plate 115 and the first right plate 116 in the front-rear direction (depth of the first main body 111).
Is designed to be longer than the length in the front-rear direction (depth of the first lid portion) of the second left side plate 123 and the second right side plate 124, so that the first main body portion 111 is the first lid portion. It has a box shape with a deeper depth than 112. Further, a peripheral wall stands up 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 lid portion 112 in the front-rear direction.
The first lid portion 112 can be housed in the flange 119. Therefore, the first main body 1
Since the boundary portion between the 11 and the first lid portion 112 (the mating surface of the first flange 119 and the second flange 128) is formed in the first main body, the waterproof performance can be improved.

The second main body 131 of the outer box 130 is formed in a box shape having a second opening 133 having an opening at one end surface, and is a substantially rectangular third bottom plate 134, from the peripheral edge of the first bottom plate 134 to the first bottom plate. 134
Side plates extending substantially perpendicular to the vertical and horizontal directions, that is, the third left plate 135 and the third right plate 13.
6. It is composed of a third upper plate 137 and a third lower plate 138. The outer surface of the third bottom plate 134 corresponds to the back surface of the power supply device 100 and comes into contact with the construction surface 102 described above.

The inner box 110 has a second main body portion with the first opening 113 covered with the first lid portion 112 so that the first lid portion 112 side faces the third bottom plate 134 side of the second main body portion 131. It is housed in 131 and attached to the third bottom plate 134 of the outer box. Then, the inner box 110 is sealed in the outer box 130 by covering the second lid portion 132 so as to close the second opening 133. Further, when sealing, the waterproof performance is improved by sandwiching the packing between the second main body portion 131 and the second lid portion 132 (not shown).

As shown in FIG. 2, the vertical size of the inner box 110 is about two-thirds the size of the outer box 130, and the inner box 110 is moved upward and attached to the outer box 130. Therefore, a space is formed in the lower part of the outer box 130. This space is a space in which a power line terminal block 140, which will be described later, and a power line 104 and wiring 200 connected to the power line terminal block 140 are accommodated.

As shown in FIG. 3, the first main body 111 of the inner box 110 accommodates the first substrate 150 and the second substrate 151 formed in a substantially rectangular shape in a plan view and a plate shape, and is a power line terminal block 140 (FIG. 2). ) Is provided on the outside of the first lower plate 118 side. The second substrate 151 is equipped with electronic components such as a control circuit (control unit 160) and a communication circuit whose main configuration is a computer system including a memory and a processor, and the surface on which the electronic components are mounted is a first opening. First bottom plate 11 toward 113
A screw is passed through the first substrate screw hole 154 formed in No. 4 and fixed. The first substrate 150 is arranged directly above the second substrate 151 (on the side of the first opening 113).

The first substrate 150 is a rigid substrate whose base material is made of glass epoxy resin, and electronic components such as a power supply circuit (FIG. 5), at least two relays 170, and a heat conductive 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 conductive member 180 are arranged facing the first opening 113 side.

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

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

Further, in the power supply device 100, a control unit 160 for opening and closing the relay 170 is a mobile body 1.
It is connected to 06 by a communication line 161 and opens and closes the relay 170 by 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, and two of the four first contacts 164 are connected to the power path 159 on the input unit 157 side via the legs (first relay terminal 171) of the relay 170, respectively. The remaining two second contacts 165 are connected to the power path 159 on the output unit 158 side via the legs of the relay 170 (second relay terminal 172), respectively.

The relay 170 has a first section 162 for opening and closing between one of the two first contacts 164 and one of the two second contacts 164, and one of the two first contacts 164. Second section 16 for opening and closing between the other contact and the other contact of the two second contacts 165
It has 3 and.

As shown in FIG. 5, the relay 170 has a box-shaped relay case 173 made of synthetic resin having a rectangular parallelepiped shape. The relay case 173 has the above-mentioned contacts 164 and 165 and sections 162.
, 163, and a coil (not shown) for operating the section are housed in the relay body.

The first relay terminal 171 and the second relay terminal 172 are formed in the shape of a metal rod, and are provided so as to project vertically from the terminal protruding surface 175, which can also be called the bottom surface of the relay main body.

As shown in FIG. 4, if the first section 162 and the first section 163 are in the ON state (conducting state), the moving body 106 such as EV from the power supply source (for example, the power system 108 or the photovoltaic power generation facility). It becomes possible to supply electric power to the storage battery 107. On the other hand, the first section 162 and the first
If the intercept 163 is in the off state (blocked state), the power system 108 does not supply power to the storage battery 107 to the mobile body 106.

As described above, the relay 170 may be controlled by the control unit 160, and in the present embodiment, a mechanical relay having mechanical contacts is used. The relay 170 may be a mechanical relay or a semiconductor relay having no mechanical contacts, and is not particularly limited.

The relay 170 generates heat when the power is supplied to the storage battery 107 of the mobile body 106 (when the power is turned on), and if this heat generation is left unattended, the sections 162 and 163 of the relay 170 remain closed, causing welding. It will be easier. A heat conductive member 180 is provided to dissipate the heat of the relay 170.

The heat conductive member 180 is provided at each of the two first relay terminals 171 and the two second relay terminals 172. In the following description, the heat conductive member 180 provided at the first relay terminal 171 and the heat conductive member 180 provided at the second relay terminal 172 have the same configuration. Therefore, in order to simplify the description, the first relay terminal 171 , And the second relay terminal 172 is simply relay terminal 1
It may be expressed as 71 or 172.

As shown in FIG. 6, the heat conductive member 180 is made of a metal having excellent heat conductivity such as a plate-shaped pure copper or a copper alloy, and has an L-shape in a side view. L-shaped heat conductive member 18
0 is a plate member bent, one of which is a heat absorbing portion 181 (first heat conductive portion) and the other of which is a heat radiating portion 1.
It is used as 82 (second heat conduction part). The heat conductive member 180 may be made of a material having a high thermal conductivity, and may be made of another metal such as iron or aluminum or another material. Further, the heat radiating portion 182 does not necessarily have to be bent in a direction (90 degrees) substantially orthogonal to the side view, and may be 80 degrees or 95 degrees, and is not particularly limited.

The heat absorbing portion 181 comes into contact with the relay terminals 171 and 172, and absorbs the heat generated by energizing the relay 170. The heat radiating unit 182 dissipates the heat absorbed by the heat absorbing unit 181.

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

As shown in FIG. 8, the heat conductive member 180 has the first relay terminal 171 of the two relays 170.
And the second relay terminal 172 are provided respectively. At this time, the heat radiating portion 182 is formed so as to extend along the first left side plate 115 or the first right side plate 116.

Hereinafter, the heat conductive member 180 will be described, but the first left plate 115 and the first right plate 116
Since the heat conductive member 180 provided on the side has the same configuration, the heat conductive member 180 provided on the first right side plate 116 side will be described.

The heat absorbing portion 181 is provided with a through hole 183 for penetrating the relay terminals 171 and 172. The through hole 183 preferably has substantially the same size and shape as the diameters of the relay terminals 171 and 172.

In the present embodiment, the through hole 183 is rectangular, but may be circular, for example.
There is no particular limitation. By adopting such a structure, the relay terminals 171 and 1
The 72 passes through the through hole 183 of the heat absorbing portion 181 and penetrates the through hole of the first substrate 150. At this time, the tips of the relay terminals 171 and 172 project from the back surface (the surface on which the circuit components are not mounted) of the first substrate 150 and are soldered to the relay 170 terminals.
The heat conductive member 180 is fixed to the first substrate 150. By taking such a structure
The relay 170 and the heat conductive member 180 can be easily fixed to the first substrate 150.

As shown in FIG. 7, the heat radiating portion 182 is formed so as to extend from the heat absorbing portion 181 along the first left side plate 115 or the first right side plate 116. Generally, each component on the substrate needs to be arranged at a certain distance so as not to cause a short circuit, but in the present embodiment, the heat radiating portion of the heat conductive member 180 is the first right plate 116 or the first right plate 116 or the first. 1 Since it is provided along the left side plate 115, it is not necessary to consider the distance to each component. Therefore, it is not necessary to provide an extra space, and the size of the substrate can be expected to be reduced.

Further, 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 does not easily interfere with other parts, and a large heat radiating area can be secured.

The height of the heat radiating portion 182 is formed so as to be shorter than the heights of the first left plate 115 and the first right plate 116. Therefore, when the first main body 111 is covered with the first lid 112, all the heat conductive members 180 that come into contact with the relay terminals 171 and 172 can be housed in the inner box 110. With such a configuration, even if the second lid 132 of the outer box 130 is opened when inspecting the power supply device 100 or the like, the heat conductive member is housed in the inner box 110, which is unexpected. It is possible to prevent a short circuit due to touching the heat conductive member 180.

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

As shown in FIG. 8, the heat conductive member 180 that comes into contact with the first relay terminal 171 and the heat conductive member 180 that comes into contact with the second relay terminal 172 are arranged adjacent to each other.

An insulating member 190 is provided in the gap between the adjacent heat conductive members 180. Insulation member 1
Reference numeral 90 denotes a part of the first left side plate 115 and the first right side plate 116 extending and integrally formed with the inner box 110. Further, the thickness of the insulating member 190 is formed so as to be shorter than the gap between the adjacent heat conductive members 180. Further, the height of the insulating member 190 is the heat conductive member 1
It is formed so as 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 conductive members 180 soldered to them also have different potentials. When these heat conductive members 180 are arranged close to each other, for example, when an earthquake or the like occurs, the heat conductive member 18 can be beaten.
There is a risk that 0s will be short-circuited. By providing the insulating member 190 as described above,
Such a short circuit can be suppressed.

The insulating member 190 does not necessarily have to be integrally formed with the first left side plate 115 and the first right side plate 116, and may be formed of another member. 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, since another member can be attached later, the insulating member 190 does not get in the way 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 was used without being bent, but as shown in FIG. 9, in the second embodiment, the heat radiating portion 182 is on the opposite side of the end portion in contact with the heat absorbing portion 181. The end is bent and used. Specifically, it is folded back. In the figure, it is folded only once, but it may be folded any number of times. At this time, it is preferable to form the side view in a substantially U-shape. By adopting such a structure, the length of the heat radiating portion 182 in the vertical direction can be suppressed and the heat radiating area can be increased. As a result, the heat dissipation capacity can be further increased while maintaining the heat conductive member 180 housed in the inner box 110.

100 Power supply device 101 Main body 102 Construction surface 103 Plug part 104 Power line 105 Holding part 106 Mobile body 107 Storage battery 108 Power system 109 Pole 110 Inner box (housing)
130 Outer box 150 1st board 151 2nd board 160 Control unit 170 Relay 171 1st relay terminal 172 2nd relay terminal 173 Relay case 175 Terminal protruding surface 180 Heat conductive member 181 Heat absorbing part 182 Heat dissipation part 183 Through hole

Claims (6)

In a power supply device that outputs power for charging a storage battery used as a power source for a mobile body via a relay having a relay terminal.
A heat conductive member that comes into contact with the relay terminal,
A power supply device including the relay and a housing for accommodating the heat conductive member inside. A board on which the relay is mounted is provided.
The heat conductive member includes a first heat conductive portion that is bent and arranged between the relay and the substrate and abuts on the relay terminal, and a second heat conductive portion provided along the wall surface of the housing. ,
The power supply device according to claim 1, wherein the power supply device is formed. A plurality of the heat conductive members are provided,
The power supply device according to claim 2, wherein an insulating member is provided between the plurality of heat conductive members. The power supply device according to any one of claims 1 to 3, wherein the insulating member is integrally formed on the housing. The power supply device according to claim 2, wherein the end portion of the second heat conductive portion is bent. The heat conductive member has a through hole and has a through hole.
The power supply according to any one of claims 1 to 5, wherein the relay terminal penetrating the through hole and the through hole of the substrate is soldered to the substrate together with the heat conductive member. apparatus.

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