RELAY UNIT

To inhibit a temperature of a relay device from reaching a usage upper limit temperature when an on-vehicle battery is charged through the relay device while preventing increasing in the physical constitution of the relay device and costs as much as possible.SOLUTION: A relay unit 15 includes: first...

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Bibliographic Details
Main Authors KAMIYA YUKI, HIGUCHI HIROAKI
Format Patent
LanguageEnglish
Japanese
Published 25.05.2023
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES
ELECTRICITY
ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL
GENERATION
MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES
PERFORMING OPERATIONS
SYSTEMS FOR STORING ELECTRIC ENERGY
TRANSPORTING
VEHICLES IN GENERAL
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Summary:To inhibit a temperature of a relay device from reaching a usage upper limit temperature when an on-vehicle battery is charged through the relay device while preventing increasing in the physical constitution of the relay device and costs as much as possible.SOLUTION: A relay unit 15 includes: first bus bars 12a, 12b, 14a, 14b forming current paths between an inlet 42 to which a charging connector of an external charger is connected and a high-voltage battery 34; relay devices 26, 28 which are provided at the first bus bars and closed when an on-vehicle battery is charged by the external charger; and second bus bars 12, 14 forming current paths between the high-voltage battery and an electric power conversion system 36 for driving a driving motor. The first bus bars are branched from the second bus bars and form the current paths extending from branch points 18, 20 and reaching the inlet through the relay devices. The relay unit 15 includes a heat radiation structure which radiates heat from the first bus bars 12a, 14a in at least areas between each branch point to each relay device.SELECTED DRAWING: Figure 1 【課題】リレー装置の体格増加やコストアップを極力招くことなく、リレー装置を介して車載バッテリを充電する間に、リレー装置の温度が使用上限温度に達することを抑制すること。【解決手段】リレーユニット１５は、外部充電装置の充電コネクタが接続されるインレット４２と高圧バッテリ３４との間の電流経路をなす第１バスバー１２ａ、１２ｂ、１４ａ、１４ｂと、第１バスバーに設けられ、外部充電装置による車載バッテリの充電時に閉成されるリレー装置２６、２８と、高圧バッテリと走行用モータを駆動するための電力変換装置３６との間の電流経路をなす第２バスバー１２、１４と、第１バスバーは、第２バスバーから分岐し、その分岐点１８、２０からリレー装置を介してインレットに達する電流経路を形成するものであり、少なくとも分岐点からリレー装置までの間の第１バスバー１２ａ、１４ａから熱を放熱させる放熱構造と、を備える。【選択図】図１
Bibliography:Application Number: JP20210185882