JP5496845B2 - Electric vehicle - Google Patents

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JP5496845B2
JP5496845B2 JP2010222879A JP2010222879A JP5496845B2 JP 5496845 B2 JP5496845 B2 JP 5496845B2 JP 2010222879 A JP2010222879 A JP 2010222879A JP 2010222879 A JP2010222879 A JP 2010222879A JP 5496845 B2 JP5496845 B2 JP 5496845B2
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heat
board
wiring
wiring board
electric vehicle
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JP2012079873A (en
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智宏 塚本
和己 柴田
崇史 冨永
進 阿久津
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Honda Motor Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02—Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427—Cooling by change of state, e.g. use of heat pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/12—Bikes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/46—Wheel motors, i.e. motor connected to only one wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/36—Temperature of vehicle components or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2270/00—Problem solutions or means not otherwise provided for
    • B60L2270/10—Emission reduction
    • B60L2270/14—Emission reduction of noise
    • B60L2270/147—Emission reduction of noise electro magnetic [EMI]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Description

本発明は、電動車両に関し、特に、電動車両を駆動する電動モータの通電を制御する電動車両用制御回路における放熱構造に関する。 The present invention relates to an electric vehicle , and more particularly, to a heat dissipation structure in an electric vehicle control circuit that controls energization of an electric motor that drives the electric vehicle .

電子部品の放熱構造としては、例えば電動アシスト自転車において、電子部品を収納した制御ボックス内で、発熱素子に対して制御ボックスの蓋に熱伝導シートを介して接触させて放熱させる構造が特許文献１に記載されている。
また、特許文献２には、電動カートのパワーモジュールを複数の層に分けて構成し、各層にそれぞれ素子を配置し、金属プレートを介して接続する構造が記載されている。 As a heat dissipation structure for an electronic component, for example, in a power-assisted bicycle, a structure in which heat is released by contacting a heating element with a lid of a control box via a heat conductive sheet in a control box containing the electronic component is disclosed in Patent Document 1. It is described in.
Patent Document 2 describes a structure in which a power module of an electric cart is divided into a plurality of layers, elements are arranged on each layer, and are connected via a metal plate.

特開２００５−１７４９９４号公報JP 2005-174994 A 特開２００６−６６８９５号公報JP 2006-66895 A

特許文献１においては、放熱性のある蓋に熱伝導シートを介して素子を接触させる構成は記載されているが、複数の素子を有する場合は、各素子を備えた全体構造についての放熱を考慮する必要がある。
特許文献２では、複数素子を積層板（金属プレート）に接続された構造が記載されているが、金属プレートごとに発熱体が実装され積層されているので、全体構造が大型化してしまうばかりか、発熱体同士が同一金属プレートに接続しており、パッケージ内において熱がこもる現象が生じるため、パッケージ単体で判断した場合、十分な放熱性が発揮されないという課題があった。 Patent Document 1 describes a configuration in which an element is brought into contact with a heat-dissipating lid through a heat conductive sheet. However, in the case of having a plurality of elements, heat dissipation is considered for the entire structure including each element. There is a need to.
Patent Document 2 describes a structure in which a plurality of elements are connected to a laminated plate (metal plate). However, since a heating element is mounted and laminated on each metal plate, not only the overall structure is enlarged. Since the heating elements are connected to the same metal plate and heat is trapped in the package, there is a problem that sufficient heat dissipation is not exhibited when judged as a single package.

本発明は上記事情に鑑みて提案されたもので、電動車両を駆動源となる電動モータの通電を制御する制御回路において、制御回路が備える発熱素子の放熱を効果的に行う放熱構造を提供することを目的としている。   The present invention has been proposed in view of the above circumstances, and provides a heat dissipation structure that effectively dissipates heat from a heat generating element included in a control circuit in a control circuit that controls energization of an electric motor that serves as a drive source for an electric vehicle. The purpose is that.

上記目的を達成するため請求項１の発明に係る電動車両は、放熱性基板（１０１）上に、絶縁接着剤（１０２）を介して、それぞれ配線が形成された複数の配線基板（１０３ａ，１０３ｂ，１０３ｃ）を積層配置してなる電動車両において、
最上面に位置する配線基板（１０３ｃ）上面に形成された第１熱伝導部材（１０４）上に発熱素子（１０５）を実装し、
最下面に位置する配線基板（１０３ａ）下面に第２熱伝導部材（１０６）を形成し、
前記第１熱伝導部材（１０４）と第２熱伝導部材（１０６）は前記各配線基板（１０３）を貫通して穿孔されたスルーホール（１０７）内に配された第３熱伝導部材（１０８）を介して接触するとともに、
前記電動車両は、金属製のスイングアーム（３０）の一端を車体に揺動自在に軸支され、他端に設けられた電動モータ（Ｍ）にて後輪を駆動する電動車両であって、前記スイングアーム（３０）内に前記制御回路及び前記電動モータ（Ｍ）に電力を供給するバッテリ（５６）を配置し、該制御回路は、車両前後方向で電動モータ（Ｍ）の前側に配置され、
前記制御回路は複数の基板を有する制御部（５０）であり、該制御部（５０）は制御信号用の素子が実装される制御基板（５０ａ）と、発熱素子が実装される発熱基板（５０ｂ）及び、アルミ基板（５０ｃ）で構成されており、制御基板（５０ａ）が前記複数の配線基板で構成され、
前記制御基板（５０ａ）は、車両前後方向で発熱基板（５０ｂ）の前側に配置され、
前記発熱基板（５０ｂ）は、車両の前後方向で、前記バッテリ（５６）と前記電動モータ（Ｍ）との中間位置に配置され、前記発熱基板（５０ｂ）は、前記スイングアーム（３０）の壁部に取り付けられている
ことを特徴とする。 In order to achieve the above object, an electric vehicle according to the invention of claim 1 includes a plurality of wiring boards (103a, 103b) each having a wiring formed on a heat radiating board (101) via an insulating adhesive (102). , in the electric vehicle comprising a laminate arranged 103c),
The heating element (105) is mounted on the first heat conducting member (104) formed on the upper surface of the wiring board (103c) located on the uppermost surface,
Forming a second heat conductive member (106) on the lower surface of the wiring board (103a) located on the lowermost surface;
The first heat conducting member (104) and the second heat conducting member (106) are arranged in a through hole (107) drilled through the wiring boards (103). ) Through and
The electric vehicle is an electric vehicle in which one end of a metal swing arm (30) is pivotally supported by a vehicle body and a rear wheel is driven by an electric motor (M) provided at the other end. A battery (56) for supplying electric power to the control circuit and the electric motor (M) is disposed in the swing arm (30), and the control circuit is disposed in front of the electric motor (M) in the vehicle longitudinal direction. ,
The control circuit is a control unit (50) having a plurality of substrates. The control unit (50) includes a control board (50a) on which elements for control signals are mounted, and a heat generation board (50b) on which heat generation elements are mounted. ) And an aluminum substrate (50c), and the control substrate (50a) is composed of the plurality of wiring substrates,
The control board (50a) is disposed on the front side of the heat generating board (50b) in the vehicle longitudinal direction,
The heat generating board (50b) is disposed at an intermediate position between the battery (56) and the electric motor (M) in the longitudinal direction of the vehicle, and the heat generating board (50b) is a wall of the swing arm (30). It is attached to the part.

請求項２は、請求項１の電動車両において、前記第２熱伝導部材（１０６）は、発熱素子（１０５）が実装された位置に対応する部分を含む島状部で形成され、前記島状部に対してスリット（１０９）を隔てて周囲を囲む囲繞部（１１０）を形成し、前記囲繞部（１１０）をグランド電位としたことを特徴としている。 According to a second aspect of the present invention, in the electric vehicle according to the first aspect, the second heat conducting member (106) is formed of an island-shaped portion including a portion corresponding to a position where the heating element (105) is mounted, and the island-shaped portion is formed. A surrounding portion (110) surrounding the periphery of the portion with a slit (109) is formed, and the surrounding portion (110) is set to a ground potential.

請求項３は、請求項１の電動車両において、前記配線基板（１０３）は電源が供給される電源線を備え、最上面に位置する配線基板（１０３ｃ）上面に前記電源線の一方側（Ｘ）を形成し、最下面に位置する配線基板（１０３ａ）下面に電源線の他方側（Ｙ）を形成し、中間層に信号線を形成したことを特徴としている。 According to a third aspect of the present invention, in the electric vehicle according to the first aspect , the wiring board (103) includes a power supply line to which power is supplied, and one side of the power supply line (X ), The other side (Y) of the power supply line is formed on the lower surface of the wiring board (103a) located on the lowermost surface, and the signal line is formed on the intermediate layer.

請求項４は、請求項３の電動車両において、前記発熱素子（１０５）は半導体素子であるとともに、前記配線基板（１０３）は前記半導体素子を制御する信号線（１１３）を備え、前記信号線（１１３）は、前記電源線の電流方向の配線基板の上下層方向に対して直角方向の配線基板の水平面方向に配置することを特徴としている。 According to a fourth aspect of the present invention, in the electric vehicle according to the third aspect, the heating element (105) is a semiconductor element, and the wiring board (103) includes a signal line (113) for controlling the semiconductor element. (113) is characterized in that it is arranged in the horizontal plane direction of the wiring board perpendicular to the upper and lower layer direction of the wiring board in the current direction of the power supply line.

請求項１に記載の発明によれば、最上面に位置する配線基板（１０３ｃ）上面に形成された第１熱伝導部材（１０４）により発熱素子（１０５）の熱を放熱させるとともに、第１熱伝導部材（１０４）の熱は、スルーホール（１０７）内に配された第３熱伝導部材（１０８）を伝わって第２熱伝導部材（１０６）に導かれて放熱性基板（１０１）から放熱されるので、多方面での効率よい放熱を行うことができる。
また、熱的に厳しいスイングアーム内にあって、電動モータの前側に配置することで電動モータの熱影響を避けながら更に制御回路での放熱性を高めることができる。
制御回路を複数の基板に分け、制御基板を複数の配線基板で積層することで、制御を司る基板の放熱性を向上させることができる。
制御信号用の素子が実装される制御基板（５０ａ）を発熱素子が実装される発熱基板（５０ｂ）より前側に配置することで、結果、電動モータ（Ｍ）や発熱基板（５０ｂ）から遠い箇所に制御基板（５０ａ）を配置することができ、他発熱部材からの影響を抑えることができ、更には制御基板（５０ａ）自身でも放熱性の良い構成とすることでより放熱性を発揮することができる。 According to the first aspect of the present invention, the heat of the heating element (105) is dissipated by the first heat conducting member (104) formed on the upper surface of the wiring board (103c) located on the uppermost surface, and the first heat The heat of the conductive member (104) is transmitted to the second heat conductive member (106) through the third heat conductive member (108) disposed in the through hole (107) and is radiated from the heat dissipation substrate (101). Therefore, efficient heat dissipation can be performed in many fields.
Further, by disposing in the thermally severe swing arm and on the front side of the electric motor, it is possible to further improve the heat dissipation in the control circuit while avoiding the thermal influence of the electric motor.
By dividing the control circuit into a plurality of substrates and laminating the control substrate with a plurality of wiring substrates, it is possible to improve the heat dissipation of the substrate responsible for control.
By disposing the control board (50a) on which the control signal elements are mounted on the front side of the heat generating board (50b) on which the heat generating elements are mounted, the result is a place far from the electric motor (M) or the heat generating board (50b). The control board (50a) can be disposed on the control board, the influence from other heat generating members can be suppressed, and further, the control board (50a) itself can also exhibit heat dissipation by adopting a structure with good heat dissipation. Can do.

請求項２に記載の発明によれば、第１熱伝導部材（１０４）、第２熱伝導部材（１０６）第３熱伝導部材（１０８）が配線に兼用された電流が流れた場合、第２熱伝導部材（１０６）の島状部に対してスリット（１０９）を隔てて周囲を囲む囲繞部（１１０）が存在し、囲繞部（１１０）がグランド電位となることで、スリット（１０９）により第１熱伝導部材（１０４）側と第２熱伝導部材（１０６）の短絡を防止するための沿面距離を確保することができる。
また、発熱素子（１０５）の熱が基板の水平面の方向に伝熱することを防止し、他の部品への影響を抑えることができる。 According to the second aspect of the present invention, when a current that is shared by the first heat conducting member (104), the second heat conducting member (106), and the third heat conducting member (108) flows, the second There is an surrounding part (110) surrounding the island-like part of the heat conducting member (106) with the slit (109) interposed therebetween, and the surrounding part (110) becomes the ground potential, so that the slit (109) A creeping distance for preventing a short circuit between the first heat conducting member (104) side and the second heat conducting member (106) can be secured.
Further, the heat of the heating element (105) can be prevented from transferring in the direction of the horizontal plane of the substrate, and the influence on other components can be suppressed.

請求項３に記載の発明によれば、電源線の＋−の配線パターンを上下層で分け、対向配置させることにより、配線によるインダクタンス成分を小さくすることができる。
その結果、配線基板に配置される平滑コンデンサの容量を小さくできるので、基板面積が小さくなり、制御回路全体のコンパクト化を図ることができる。 According to the third aspect of the present invention, the inductance component due to the wiring can be reduced by dividing the +-wiring pattern of the power supply line by the upper and lower layers and arranging them in opposition.
As a result, since the capacity of the smoothing capacitor disposed on the wiring board can be reduced, the board area can be reduced and the entire control circuit can be made compact.

請求項４に記載の発明によれば、電流方向に対して信号線（１１３）を直角に配することで、電源電流に対して微弱電流である信号線（１１３）へのノイズの影響を小さくすることができる。   According to the fourth aspect of the present invention, by arranging the signal line (113) at right angles to the current direction, the influence of noise on the signal line (113), which is a weak current with respect to the power supply current, is reduced. can do.

電動車両用バッテリが搭載された電動二輪車の左側面図である。It is a left view of the electric motorcycle carrying the battery for electric vehicles. 電動車両用バッテリの実施形態の一例を示すもので、電動車両用バッテリが配置されたスイングアーム部分のカバーを外した状態を示す左側面図である。It is an example of embodiment of the battery for electric vehicles, and is a left view which shows the state which removed the cover of the swing arm part in which the battery for electric vehicles is arrange | positioned. 図２の電動車両用バッテリが配置されたスイングアーム部分の上面図である。FIG. 3 is a top view of a swing arm portion where the electric vehicle battery of FIG. 2 is disposed. スイングアームの分解斜視図である。It is a disassembled perspective view of a swing arm. 本発明の電動車両用制御回路（アルミ基板）の平面図である。It is a top view of the control circuit (aluminum board | substrate) for electric vehicles of this invention. 電動車両用制御回路において発熱素子が実装された部分を示すもので、（ａ）は平面図、（ｂ）は（ａ）のＡ−Ａ線断面図である。The part by which the heat generating element was mounted in the control circuit for electric vehicles is shown, (a) is a top view, (b) is the sectional view on the AA line of (a). モータ駆動に着目した電動車両用制御回路（アルミ基板）の簡易等価回路図である。It is a simple equivalent circuit diagram of an electric vehicle control circuit (aluminum substrate) focusing on motor drive. 図７の電動車両用制御回路の部品面Ａの一部分を示す平面図である。It is a top view which shows a part of component surface A of the control circuit for electric vehicles of FIG. 図８に対応する電動車両用制御回路の信号線面Ｂの一部分を示す平面図である。FIG. 9 is a plan view showing a part of a signal line plane B of the electric vehicle control circuit corresponding to FIG. 8. 図９に対応する電動車両用制御回路の信号線面Ｃの一部分を示す平面図である。FIG. 10 is a plan view showing a part of a signal line surface C of the electric vehicle control circuit corresponding to FIG. 9. 図１０に対応する電動車両用制御回路の放熱面Ｄの一部分を示す平面図である。It is a top view which shows a part of heat radiating surface D of the control circuit for electric vehicles corresponding to FIG.

以下、図面を参照して本発明の好ましい実施の形態について詳細に説明する。図１は、本発明の一実施形態に係る電動二輪車１の側面図である。
電動二輪車１は、低床フロア１６を有するスクータ型の鞍乗型車両であり、スイングアーム（ユニットスイング）３０に収納された電動モータＭによって後輪ＷＲを駆動する。車体フレーム２の前部には、ステムシャフト（不図示）を回転自在に軸支するヘッドパイプ３が結合されている。ステムシャフトの上部には、ハンドルカバー１１で覆われる操向ハンドル８が結合されており、一方の下部には、車軸７によって前輪ＷＦを回動自在に軸支する左右一対のフロントフォーク６が結合されている。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of an electric motorcycle 1 according to an embodiment of the present invention.
The electric motorcycle 1 is a scooter type straddle-type vehicle having a low floor 16 and drives a rear wheel WR by an electric motor M housed in a swing arm (unit swing) 30. A head pipe 3 that rotatably supports a stem shaft (not shown) is coupled to the front portion of the vehicle body frame 2. A steering handle 8 covered with a handle cover 11 is coupled to the upper portion of the stem shaft, and a pair of left and right front forks 6 that pivotally support the front wheel WF by the axle 7 are coupled to one lower portion. Has been.

車体フレーム２は、ヘッドパイプ３の後部から下方に延びるメインパイプ４と、該メインパイプ４の後端部に連結されて車体後部上方へ延びるリヤフレーム５とを備える。低床フロア１６の下部に位置するメインパイプ４には、低床フロア１６を支持するフロアフレーム１５が取り付けられている。また、メインパイプ４とリヤフレーム５との結合部には、左右一対のピボットプレート１７が取り付けられている。   The vehicle body frame 2 includes a main pipe 4 that extends downward from the rear portion of the head pipe 3, and a rear frame 5 that is connected to the rear end portion of the main pipe 4 and extends upward of the rear portion of the vehicle body. A floor frame 15 that supports the low floor 16 is attached to the main pipe 4 that is positioned below the low floor 16. A pair of left and right pivot plates 17 are attached to the joint between the main pipe 4 and the rear frame 5.

スイングアーム３０は、車幅方向左側のみにアーム部を有する片持ち式であり、ピボットプレート１７に取り付けられたリンク１８を貫通する揺動軸１９を介して、車体フレーム２に揺動自在に軸支されている。スイングアーム３０は、アルミ等の金属からなる一部中空構造体であり、車軸３２の近傍に電動モータＭが収納されると共に、電動モータＭの車体前方には、制御装置としての基板（制御部）５０が配設されている。電動モータＭに電力を供給するバッテリ５６（図３参照）は、基板（制御部）５０の車幅方向右側に配設されている。   The swing arm 30 is a cantilever type having an arm portion only on the left side in the vehicle width direction, and is pivotable to the vehicle body frame 2 via a swing shaft 19 that passes through a link 18 attached to the pivot plate 17. It is supported. The swing arm 30 is a partially hollow structure made of metal such as aluminum, and the electric motor M is accommodated in the vicinity of the axle 32, and a board (control unit) as a control device is disposed in front of the electric motor M in the vehicle body. ) 50 is provided. A battery 56 (see FIG. 3) for supplying electric power to the electric motor M is disposed on the right side of the board (control unit) 50 in the vehicle width direction.

後輪ＷＲは、車軸３２によってスイングアーム３０に回転自在に軸支されており、スイングアーム３０の後端部は、リヤクッション２６を介してリヤフレーム５に吊り下げられている。また、シート２０の下部には、ヘルメットや荷物入れスペースとなる収納ボックス２１が、左右一対のリヤフレーム５に挟まれるように配設されている。   The rear wheel WR is rotatably supported on the swing arm 30 by the axle 32, and the rear end portion of the swing arm 30 is suspended from the rear frame 5 via the rear cushion 26. In addition, a storage box 21 serving as a helmet or a luggage storage space is disposed below the seat 20 so as to be sandwiched between a pair of left and right rear frames 5.

車体フレーム２のメインパイプ４は、車体前方側のフロントカウル１３および車体後方側のレッグシールド１２で覆われている。ハンドルカバー１１の上部には、メータ装置９が配設されており、メータ装置９の車体前方側には前照灯１０が取り付けられている。フロントフォーク６の上部には、前輪ＷＦを覆うフロントフェンダ１４が固定されている。   The main pipe 4 of the vehicle body frame 2 is covered with a front cowl 13 on the front side of the vehicle body and a leg shield 12 on the rear side of the vehicle body. A meter device 9 is disposed on the handle cover 11, and a headlamp 10 is attached to the front side of the meter device 9 on the vehicle body. A front fender 14 that covers the front wheel WF is fixed to the top of the front fork 6.

リヤフレーム５の車幅方向外側はシートカウル２３で覆われており、シートカウル２３の後端部には尾灯装置２４が取り付けられている。尾灯装置２４の上方には、リヤフレーム５に結合されたリヤキャリア２２が突出しており、尾灯装置２４の下方には、後輪ＷＲの後方上方を覆うリヤフェンダ２５が設けられている。   The outer side of the rear frame 5 in the vehicle width direction is covered with a seat cowl 23, and a tail lamp device 24 is attached to the rear end portion of the seat cowl 23. A rear carrier 22 coupled to the rear frame 5 protrudes above the taillight device 24, and a rear fender 25 is provided below the taillight device 24 to cover the rear upper side of the rear wheel WR.

図２は、電動車両用バッテリを搭載するスイングアーム３０の拡大側面図である。また、図３はスイングアーム３０の上面図であり、図４は、スイングアーム３０の分解斜視図である。前記と同一符号は、同一または同等部分を示す。前記したように、スイングアーム３０は、アルミ等の金属からなる一部中空構造体であり、後輪ＷＲを車幅方向左側のアーム部３９で支持する片持ち式とされる。スイングアーム３０の車体前方側下部には、揺動軸１９（図１参照）の貫通孔１９ａが形成された左右一対のピボットフランジ３６が設けられている。   FIG. 2 is an enlarged side view of the swing arm 30 on which the electric vehicle battery is mounted. FIG. 3 is a top view of the swing arm 30, and FIG. 4 is an exploded perspective view of the swing arm 30. The same reference numerals as those described above denote the same or equivalent parts. As described above, the swing arm 30 is a partially hollow structure made of metal such as aluminum, and is a cantilever type in which the rear wheel WR is supported by the left arm portion 39 in the vehicle width direction. A pair of left and right pivot flanges 36 in which through holes 19a of the swing shaft 19 (see FIG. 1) are formed are provided at the lower part of the swing arm 30 on the front side of the vehicle body.

ピボットフランジ３６の車体上方側には、複数のバッテリセル５６が挿入される収納空間３５が形成されており、この収納空間３５の外殻部を形成する幅広ケース部３８とアーム部３９とは、湾曲部４０を介して連続的に形成されている。収納空間３５およびアーム部３９の車幅方向左側には、基板（制御部）５０および電動モータＭを一体的に覆う薄板状のスイングアームカバー５７が取り付けられている。   A storage space 35 into which a plurality of battery cells 56 are inserted is formed on the vehicle body upper side of the pivot flange 36. The wide case portion 38 and the arm portion 39 that form the outer shell portion of the storage space 35 are: It is formed continuously via the bending portion 40. A thin plate-like swing arm cover 57 that integrally covers the board (control unit) 50 and the electric motor M is attached to the left side of the storage space 35 and the arm part 39 in the vehicle width direction.

アーム部３９の後端部には、電動モータＭの回転を減速する減速機が収納された減速機ケース３３，４１が取り付けられている。車軸３２は、減速機ケース４１から車幅方向右側に向けて突出しており、この車軸３２の端部に、後輪ＷＲのホイール３４がナット３２ａによって固定されている。後輪ＷＲにはチューブレスタイヤが使用され、ホイール３４にはエアバルブ４２が設けられている。また、減速機ケース３３には、リヤクッション２６（図１参照）を取り付けるための貫通孔２６ａが形成された取付フランジ３７が設けられている。   Reducer cases 33 and 41 in which a reducer that decelerates the rotation of the electric motor M is housed are attached to the rear end of the arm portion 39. The axle 32 protrudes from the reduction gear case 41 toward the right side in the vehicle width direction, and a wheel 34 of the rear wheel WR is fixed to an end portion of the axle 32 by a nut 32a. A tubeless tire is used for the rear wheel WR, and an air valve 42 is provided on the wheel 34. The reduction gear case 33 is provided with an attachment flange 37 in which a through hole 26a for attaching the rear cushion 26 (see FIG. 1) is formed.

スイングアーム３０の一端側の揺動軸近傍には、内部に方形状の収納空間３５が一体的に形成されている。収納空間３５は、スイングアーム３０を電動車両に装着した場合に、電動車両の側方に収納空間３５の開口側（開口部）が位置し、この開口側からバッテリ５６を挿入可能なようになっている。   In the vicinity of the swing shaft on one end side of the swing arm 30, a rectangular storage space 35 is integrally formed. When the swing arm 30 is mounted on an electric vehicle, the storage space 35 has an opening side (opening) of the storage space 35 on the side of the electric vehicle, and the battery 56 can be inserted from this opening side. ing.

制御部５０は、制御基板５０ａと発熱素子基板５０ｂとアルミ基板５０ｃとで構成され、バッテリ５６とアルミ基板５０ｃとの間には、所定の厚みを有するスポンジラバー５０１が配設されている。スポンジラバー５０１には、各バッテリセルの図示左端部に設けられた板状端子を差し込むための複数のスリットが形成されている。板状端子５００を各スリットに挿入することで、板状端子の位置が規定されることとなる。また、スポンジラバー５０１によれば、後述するポッティング処理時のポッティング剤５９の使用量を低減して、スイングアーム３０の軽量化を図ることができる。アルミ基板５０ｃは、このスポンジラバー５０１に近接配置されている。   The control unit 50 includes a control board 50a, a heating element board 50b, and an aluminum board 50c, and a sponge rubber 501 having a predetermined thickness is disposed between the battery 56 and the aluminum board 50c. The sponge rubber 501 is formed with a plurality of slits for inserting plate-like terminals provided at the left end of each battery cell in the figure. By inserting the plate-like terminal 500 into each slit, the position of the plate-like terminal is defined. Further, according to the sponge rubber 501, it is possible to reduce the amount of the potting agent 59 used in the potting process described later and to reduce the weight of the swing arm 30. The aluminum substrate 50c is disposed close to the sponge rubber 501.

制御基板５０ａには、制御信号用のほとんど発熱しない素子が実装されている。これに対し、大電流が流れて発熱する素子は、発熱素子基板５０ｂ及びアルミ基板５０ｃに実装されている。そして、発熱素子の内、熱容量が大きいサーミスタ５１、充電器用の入出力フィルタ群５２、充電器力率改善用インダクタ５３、充電器力率改善用コンデンサ５４、ＤＣ出力用平滑コンデンサ５５等は発熱素子基板５０ｂに実装し、発熱素子の内、熱容量が小さい電子部品がアルミ基板５０ｃに実装されている。   On the control board 50a, an element that hardly generates heat for the control signal is mounted. On the other hand, the elements that generate heat when a large current flows are mounted on the heating element substrate 50b and the aluminum substrate 50c. Among the heat generating elements, a thermistor 51 having a large heat capacity, a charger input / output filter group 52, a charger power factor improving inductor 53, a charger power factor improving capacitor 54, a DC output smoothing capacitor 55, and the like are heat generating elements. An electronic component having a small heat capacity is mounted on the aluminum substrate 50c, mounted on the substrate 50b.

次に、本発明の電動車両に搭載される電動車両用制御回路であるアルミ基板５０ｃの詳細構造について、図５〜図１１を参照しながら説明する。
図５は、アルミ基板５０ｃ全体を上面から見たものであり、複数のＦＥＴ（発熱素子）１０５が所望の位置に実装されている。 Next, the detailed structure of the aluminum substrate 50c, which is an electric vehicle control circuit mounted on the electric vehicle of the present invention, will be described with reference to FIGS.
FIG. 5 is a top view of the entire aluminum substrate 50c, and a plurality of FETs (heating elements) 105 are mounted at desired positions.

図５における発熱素子が実装された電動車両用制御回路の一部分は、図６に示すように、放熱性基板１０１上に、絶縁接着剤１０２を介して、積層された配線基板１０３を装着して形成されている。配線基板１０３は、それぞれ配線が形成された複数（３枚）の配線基板１０３ａ，１０３ｂ，１０３ｃが積層されて構成されている。放熱性基板１０１は、伝導性が良好な部材、例えばアルミ基板で構成されている。
配線基板１０３の最上面に位置する配線基板１０３ｃ上面には、第１熱伝導部材１０４が形成され、この上に複数のＦＥＴ（半導体素子）１０５が実装されている。１０５ａは、ＦＥＴ（半導体素子）１０５を配線基板１０３ｃ上面に固定して実装するための端子を示している。
また、最下面に位置する配線基板１０３ａ下面に第２熱伝導部材１０６が形成されている。各配線基板は、ガラスエポキシ樹脂で構成され、第１熱伝導部材１０４及び第２熱伝導部材１０６は、ガラスエポキシ樹脂上にメッキ処理された熱伝導性及び導電性を有する所望パターンの銅箔で形成されている。 As shown in FIG. 6, a part of the control circuit for an electric vehicle on which the heating element in FIG. 5 is mounted has a laminated wiring board 103 mounted on a heat radiating board 101 with an insulating adhesive 102 interposed therebetween. Is formed. The wiring board 103 is configured by laminating a plurality (three) of wiring boards 103a, 103b, and 103c each having a wiring formed thereon. The heat dissipating substrate 101 is made of a member having good conductivity, such as an aluminum substrate.
The wiring substrate 103c upper surface located on the uppermost surface of the wiring board 103, the first thermal conductive member 104 is formed, a plurality of the FET (semiconductor element) 105 is mounted on this. Reference numeral 105a denotes a terminal for mounting the FET (semiconductor element) 105 fixed on the upper surface of the wiring substrate 103c.
A second heat conductive member 106 is formed on the lower surface of the wiring board 103a located on the lowermost surface. Each wiring board is made of glass epoxy resin, and the first heat conductive member 104 and the second heat conductive member 106 are made of copper foil of a desired pattern having thermal conductivity and conductivity plated on the glass epoxy resin. Is formed.

前記第１熱伝導部材１０４と第２熱伝導部材１０６は、前記各配線基板１０３を貫通して穿孔されたスルーホール１０７内に配された第３熱伝導部材１０８を介して接触している。第３熱伝導部材１０８は、スルーホール１０７の周囲の壁面に対して銅メッキ処理することで孔の内周に沿って形成されている。
第２熱伝導部材１０６は、配線基板１０３ａの裏面において、配線基板１０３ｃの発熱素子１０５が実装された位置に対応する部分を含む方形状の島状部で構成され、この島状部に対してスリット（切れ込み）１０９を隔てて周囲を囲むように囲繞部１１０が形成される。囲繞部（１１０）は接地されることで、グランド電位となっている。 The first heat conducting member 104 and the second heat conducting member 106 are in contact with each other through a third heat conducting member 108 disposed in a through hole 107 that is drilled through each wiring board 103. The third heat conducting member 108 is formed along the inner periphery of the hole by performing copper plating on the wall surface around the through hole 107.
The second heat conducting member 106 is formed of a rectangular island-shaped portion including a portion corresponding to the position where the heating element 105 of the wiring substrate 103c is mounted on the back surface of the wiring substrate 103a. The surrounding portion 110 is formed so as to surround the periphery of the slit (cut) 109. The surrounding portion (110) is grounded to be at a ground potential.

この構成により、第１熱伝導部材１０４、第２熱伝導部材１０６、第３熱伝導部材１０８が配線に兼用されて電流が流れた場合、第２熱伝導部材１０６の島状部に対してスリット１０９を隔てて囲繞部１１０が存在し、囲繞部１１０がグランド電位となることで、第１熱伝導部材１０４側と第２熱伝導部材１０６の短絡を防止するための沿面距離を確保することができる。
また、囲繞部１１０は、発熱素子１０５からの伝熱熱が水平面方向に伝わらないようにすることで、他の部品への影響を抑えることができる。 With this configuration, when the first heat conducting member 104, the second heat conducting member 106, and the third heat conducting member 108 are also used as wiring and a current flows, a slit is formed with respect to the island-shaped portion of the second heat conducting member 106. The surrounding portion 110 exists at 109, and the surrounding portion 110 becomes a ground potential, so that a creeping distance for preventing a short circuit between the first heat conducting member 104 side and the second heat conducting member 106 can be secured. it can.
Moreover, the surrounding part 110 can suppress the influence on other components by preventing the heat-transfer heat from the heat generating element 105 from being transmitted in the horizontal plane direction.

モータＭの駆動に着目した電動車両用制御回路（アルミ基板）の簡易等価回路図は図７に示すようになり、各半導体のオン・オフを制御することにより電源線を介して電源電圧が供給されモータＭが駆動される。この場合において、電源線の＋側である配線Ｘは、配線基板１０３ｃの上面に配置された第１熱伝導部材１０４と同じ面に銅箔で形成され、第１熱伝導部材１０４に接続されている。
また、電源線の−側である配線Ｙは、配線基板１０３ａの下面に配置された囲繞部１１０及び第２熱伝導部材１０６と同じ面に銅箔で形成され、囲繞部１１０及び第２熱伝導部材１０６はグランド電位に接続されている。配線Ｘと配線Ｙとは、スルーホール１０７に配された第３の熱伝導部材１０８により接続し、電気的接続と放熱通路とを兼用することで、配線基板の上下方向に駆動電流が流れる。
したがって、配線Ｘ，Ｙに対しては、スリット１０９を設けた囲繞部１１０が存在することにより、配線ＸとＹの短絡を防止するための沿面距離を確保することができる。
また、電源線を異なる配線基板の各層に形成し、２層に分けて対向配置することにより、配線によるインダクタンス成分を小さくすることができる。また、インダクタンス成分を小さくすることにより、配線基板に実装する平滑コンデンサの容量も小さくすることができ、配線基板の基板面積も小さくすることができる。 A simplified equivalent circuit diagram of an electric vehicle control circuit (aluminum substrate) focusing on driving of the motor M is as shown in FIG. 7, and a power supply voltage is supplied via a power supply line by controlling on / off of each semiconductor. Then, the motor M is driven. In this case, the wiring X which is the + side of the power supply line is formed of copper foil on the same surface as the first heat conductive member 104 disposed on the upper surface of the wiring board 103c, and is connected to the first heat conductive member 104. Yes.
The wiring Y, which is the negative side of the power supply line, is formed of copper foil on the same surface as the surrounding portion 110 and the second heat conducting member 106 disposed on the lower surface of the wiring board 103a. The member 106 is connected to the ground potential. The wiring X and the wiring Y are connected by the third heat conducting member 108 disposed in the through hole 107, and the electric current and the heat radiation path are combined, so that a drive current flows in the vertical direction of the wiring board.
Therefore, for the wirings X and Y, the presence of the surrounding portion 110 provided with the slit 109 makes it possible to secure a creepage distance for preventing a short circuit between the wirings X and Y.
Further, by forming the power supply lines in each layer of different wiring boards and arranging the power supply lines in two layers so as to face each other, the inductance component due to the wiring can be reduced. Further, by reducing the inductance component, the capacity of the smoothing capacitor mounted on the wiring board can be reduced, and the board area of the wiring board can also be reduced.

図６における配線基板１０３は３枚で構成されるが、配線や熱伝導部材が形成される形成面は、配線基板１０３ｃの上面である部品面（電源線面）Ａ，配線基板１０３ｂの上面である信号線面Ｂ，配線基板１０３ａの上面である信号線面Ｃ，配線基板１０３ａの下面である放熱面（ＧＮＤ線面）Ｄの４層で構成される。図６の一部分（配線基板１０３の上下において同一部分）を含む部品面Ａ，信号線面Ｂ，信号線面Ｃ，放熱面Ｄの平面を示すと、図８〜図１１のようになる。 Is composed of three wiring board 103 in FIG. 6, formed surface wiring and the heat conductive member is formed, which is the upper surface of the wiring board 103c component side (power supply line side) A, the upper surface of the wiring board 10 3b in a signal line side B, the wiring substrate 103 a top surface and a signal line side C of the composed of four layers of the lower surface is a heat radiating surface of the wiring board 10 3a (GND line plane) D. Component side A comprising a portion of FIG. 6 (the same portion in the upper and lower wiring board 10 3), the signal line side B, the signal line plane C, and shows the plane of the radiating surface D, is shown in FIGS. 8 to 11.

図８の部品面（１層目）Ａには、図５の一部（ほぼ丸印部分に相当する）であり、発熱素子１０５より一回り大きい方形状の第１熱伝導部材１０４に発熱素子１０５がそれぞれ実装されている。第１熱伝導部材１０４の周囲適宜位置には、スルーホール１０７にメッキ処理された複数の円状の第３熱伝導部材１０８が形成されている。   The component surface (first layer) A in FIG. 8 is a part of FIG. 5 (substantially corresponding to a circle), and the first heat conducting member 104 having a shape slightly larger than the heat generating element 105 has a heat generating element. 105 are respectively mounted. A plurality of circular third heat conduction members 108 plated in the through holes 107 are formed at appropriate positions around the first heat conduction member 104.

図９の信号線面（２層目）Ｂには、部品面（１層目）Ａの第３熱伝導部材１０８に対応する位置に第３熱伝導部材１０８が形成されている。
図１０の信号線面（３層目）Ｃには、信号線面（２層目）Ｂと同様に、部品面（１層目）Ａの第３熱伝導部材１０８に対応する位置に第３熱伝導部材１０８が形成されている。 On the signal line surface (second layer) B in FIG. 9, a third heat conductive member 108 is formed at a position corresponding to the third heat conductive member 108 on the component surface (first layer) A.
Similarly to the signal line surface (second layer) B, the signal line surface (third layer) C in FIG. 10 has a third position at a position corresponding to the third heat conducting member 108 on the component surface (first layer) A. A heat conducting member 108 is formed.

また、図９の信号線面（２層目）Ｂには、例えば２次側トランスの出力（＋）の配線パターン１１１が、図１０の信号線面（３層目）Ｃには、２次側トランスの出力（−）の配線パターン１１２がそれぞれ形成されている。配線パターン１１１，１１２が上下層で対向配置するように形成される構成により、配線パターンが近接し、ループによるインダクタンス成分を小さくすることができる。   Further, the signal line plane (second layer) B of FIG. 9 has, for example, the output (+) wiring pattern 111 of the secondary transformer, and the signal line plane (third layer) C of FIG. A wiring pattern 112 for the output (−) of the side transformer is formed. With the configuration in which the wiring patterns 111 and 112 are formed so as to face each other in the upper and lower layers, the wiring patterns are close to each other, and the inductance component due to the loop can be reduced.

また、信号線面（２層目）Ｂには、ＦＥＴを制御する信号線１１３が形成されている。信号線１１３は、電源線（Ｘ，Ｙ）の電流方向（図における裏面方向）に対して直角（図における紙面方向）に配置することで、信号線１１３と同じ平面に電源電流が流れないのでその影響が小さくなり、ノイズの影響を受けることを小さくすることができる。   On the signal line surface (second layer) B, a signal line 113 for controlling the FET is formed. Since the signal line 113 is arranged at a right angle (the paper surface direction in the drawing) with respect to the current direction (the back surface direction in the drawing) of the power supply line (X, Y), the power supply current does not flow in the same plane as the signal line 113. The influence is reduced, and the influence of noise can be reduced.

図１１の放熱面（４層目）Ｄには、放熱性基板（アルミ基板）１０１に対して絶縁樹脂を介して接触する第２熱伝導部材１０６が形成されている。また、信号線面（２層目）Ｂ及び信号線面（２層目）Ｂと同様に、部品面（１層目）Ａの第３熱伝導部材１０８に対応する位置に第３熱伝導部材１０８が形成されている。   On the heat dissipation surface (fourth layer) D in FIG. 11, a second heat conductive member 106 that contacts the heat dissipating substrate (aluminum substrate) 101 via an insulating resin is formed. Similarly to the signal line surface (second layer) B and the signal line surface (second layer) B, the third heat conductive member is located at a position corresponding to the third heat conductive member 108 on the component surface (first layer) A. 108 is formed.

上述の構成によれば、発熱素子１０５の熱が発生すると、第１熱伝導部材１０４により発生熱を上面から放熱させるとともに、第１熱伝導部材１０４の熱は、スルーホール１０７内に配された第３熱伝導部材１０８を伝わって第２熱伝導部材１０６に導かれ、第２熱伝導部材１０６から絶縁接着剤１０２を介して放熱性基板１０１に伝熱し、放熱性基板１０１の下面から積極的に放熱される。
その結果、発熱素子１０５の発生熱に対して、多方面（上面及び下面）での効率よい放熱を行うことができる。 According to the above-described configuration, when the heat of the heating element 105 is generated, the generated heat is radiated from the upper surface by the first heat conducting member 104, and the heat of the first heat conducting member 104 is arranged in the through hole 107. The heat is transferred to the second heat conductive member 106 through the third heat conductive member 108, transferred from the second heat conductive member 106 to the heat radiating substrate 101 through the insulating adhesive 102, and actively transmitted from the lower surface of the heat radiating substrate 101. Heat is dissipated.
As a result, it is possible to efficiently dissipate heat in many directions (upper surface and lower surface) with respect to the heat generated by the heating element 105.

１…電動二輪車、 ２…車体フレーム、 ８…操向ハンドル、 ９…メータ装置、 １６…低床フロア、 １９…揺動軸、 ３０…スイングアーム、 ３２…車軸、 ３５…収納空間、 ３８…幅広ケース部、 ３８ａ…貫通孔、 ３９…アーム部、 ４０…湾曲部、 ４４…ガイド溝、 ４５…塞栓、 ５０…基板（制御部）、 ５０ａ…制御基板、 ５０ｂ…発熱素子基板、 ５０ｃ…電動車両用制御回路、 ５６…バッテリ、 ５７…スイングアームカバー、 １０１…放熱性基板（アルミ基板）、 １０２…絶縁接着剤、 １０３ａ，１０３ｂ，１０３ｃ…配線基板、 １０４…第１熱伝導部材、 １０５…発熱素子（半導体素子）、 １０６…第２熱伝導部材（島状部）、 １０７…スルーホール、 １０８…第３熱伝導部材、 １０９…スリット、 １１０…囲繞部、 １１１，１１２…配線パターン、 １１３…信号線、 Ａ…部品面、 Ｂ…信号線面、 Ｃ…信号線面、 Ｄ…放熱面、 Ｍ…電動モータ、 Ｘ，Ｙ…配線（電源線）、 ＷＲ…後輪。   DESCRIPTION OF SYMBOLS 1 ... Electric motorcycle, 2 ... Body frame, 8 ... Steering handle, 9 ... Metering device, 16 ... Low floor floor, 19 ... Swing axis, 30 ... Swing arm, 32 ... Axle, 35 ... Storage space, 38 ... Wide Case part 38a ... Through hole 39 ... Arm part 40 ... Curved part 44 ... Guide groove 45 ... Embolization 50 ... Board (control part) 50a ... Control board 50b ... Heating element board 50c ... Electric vehicle Control circuit 56 ... battery 57 ... swing arm cover 101 ... heat dissipation board (aluminum board) 102 ... insulating adhesive 103a, 103b, 103c ... wiring board 104 ... first heat conducting member 105 ... heat generation Element (semiconductor element), 106 ... second heat conducting member (island-like part), 107 ... through hole, 108 ... third heat conducting member, 109 ... slit, DESCRIPTION OF SYMBOLS 10 ... Go part, 111, 112 ... Wiring pattern, 113 ... Signal line, A ... Component surface, B ... Signal line surface, C ... Signal line surface, D ... Heat radiation surface, M ... Electric motor, X, Y ... Wiring ( Power line), WR ... rear wheel.

Claims (4)

放熱性基板（１０１）上に、絶縁接着剤（１０２）を介して、それぞれ配線が形成された複数の配線基板（１０３ａ，１０３ｂ，１０３ｃ）を積層配置してなる電動車両において、
最上面に位置する配線基板（１０３ｃ）上面に形成された第１熱伝導部材（１０４）上に発熱素子（１０５）を実装し、
最下面に位置する配線基板（１０３ａ）下面に第２熱伝導部材（１０６）を形成し、
前記第１熱伝導部材（１０４）と第２熱伝導部材（１０６）は前記各配線基板（１０３）を貫通して穿孔されたスルーホール（１０７）内に配された第３熱伝導部材（１０８）を介して接触するとともに、
前記電動車両は、金属製のスイングアーム（３０）の一端を車体に揺動自在に軸支され、他端に設けられた電動モータ（Ｍ）にて後輪を駆動する電動車両であって、前記スイングアーム（３０）内に前記制御回路及び前記電動モータ（Ｍ）に電力を供給するバッテリ（５６）を配置し、該制御回路は、車両前後方向で電動モータ（Ｍ）の前側に配置され、
前記制御回路は複数の基板を有する制御部（５０）であり、該制御部（５０）は制御信号用の素子が実装される制御基板（５０ａ）と、発熱素子が実装される発熱基板（５０ｂ）及び、アルミ基板（５０ｃ）で構成されており、制御基板（５０ａ）が前記複数の配線基板で構成され、
前記制御基板（５０ａ）は、車両前後方向で発熱基板（５０ｂ）の前側に配置され、
前記発熱基板（５０ｂ）は、車両の前後方向で、前記バッテリ（５６）と前記電動モータ（Ｍ）との中間位置に配置され、前記発熱基板（５０ｂ）は、前記スイングアーム（３０）の壁部に取り付けられている
ことを特徴とする電動車両。 In an electric vehicle in which a plurality of wiring boards (103a, 103b, 103c) each having a wiring formed thereon are arranged on a heat dissipating board (101) via an insulating adhesive (102) ,
The heating element (105) is mounted on the first heat conducting member (104) formed on the upper surface of the wiring board (103c) located on the uppermost surface,
Forming a second heat conductive member (106) on the lower surface of the wiring board (103a) located on the lowermost surface;
The first heat conducting member (104) and the second heat conducting member (106) are arranged in a through hole (107) drilled through the wiring boards (103). ) Through and
The electric vehicle is an electric vehicle in which one end of a metal swing arm (30) is pivotally supported by a vehicle body and a rear wheel is driven by an electric motor (M) provided at the other end. A battery (56) for supplying electric power to the control circuit and the electric motor (M) is disposed in the swing arm (30), and the control circuit is disposed in front of the electric motor (M) in the vehicle longitudinal direction. ,
The control circuit is a control unit (50) having a plurality of substrates. The control unit (50) includes a control board (50a) on which elements for control signals are mounted, and a heat generation board (50b) on which heat generation elements are mounted. ) And an aluminum substrate (50c), and the control substrate (50a) is composed of the plurality of wiring substrates,
The control board (50a) is disposed on the front side of the heat generating board (50b) in the vehicle longitudinal direction,
The heat generating board (50b) is disposed at an intermediate position between the battery (56) and the electric motor (M) in the longitudinal direction of the vehicle, and the heat generating board (50b) is a wall of the swing arm (30). An electric vehicle characterized by being attached to a part. 前記第２熱伝導部材（１０６）は発熱素子（１０５）が実装された位置に対応する部分を含む島状部で形成され、前記島状部に対してスリット（１０９）を隔てて周囲を囲む囲繞部（１１０）を形成し、前記囲繞部（１１０）をグランド電位とした請求項１に記載の電動車両。 The second heat conducting member (106) is formed of an island-shaped portion including a portion corresponding to a position where the heating element (105) is mounted, and surrounds the island-shaped portion with a slit (109) therebetween. The electric vehicle according to claim 1, wherein an enclosure (110) is formed, and the enclosure (110) is set to a ground potential. 前記配線基板（１０３）は電源が供給される電源線を備え、
最上面に位置する配線基板（１０３ｃ）上面に前記電源線の一方側（Ｘ）を形成し、最下面に位置する配線基板（１０３ａ）下面に電源線の他方側（Ｙ）を形成し、中間層に信号線を形成した請求項１に記載の電動車両。 The wiring board (103) includes a power supply line to which power is supplied,
One side (X) of the power supply line is formed on the upper surface of the wiring board (103c) located on the uppermost surface, and the other side (Y) of the power supply line is formed on the lower surface of the wiring board (103a) located on the lowermost surface. The electric vehicle according to claim 1, wherein a signal line is formed in the layer. 前記発熱素子（１０５）は半導体素子であるとともに、前記配線基板（１０３）は前記半導体素子を制御する信号線（１１３）を備え、
前記信号線（１１３）は、前記電源線の電流方向（配線基板の上下層方向）に対して直角（配線基板の水平面方向）に配置する請求項３に記載の電動車両。 The heating element (105) is a semiconductor element, and the wiring board (103) includes a signal line (113) for controlling the semiconductor element,
The electric vehicle according to claim 3, wherein the signal line (113) is arranged at a right angle (horizontal direction of the wiring board) with respect to a current direction of the power supply line (upper and lower layers direction of the wiring board).
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