To provide a relay diagnostic device for an electric vehicle capable of suppressing increase of a changeover frequency of a relay and performing deposition diagnosis of a relay.SOLUTION: A relay diagnostic device (33) for an electric vehicle is mounted on an electric vehicle which comprises: a first relay set (B1) for opening and closing a pair of power source lines (L0); and a second relay set (B2) for opening and closing a pair of branch lines (L1) branched from the pair of power source lines. The relay diagnostic device comprises a diagnosis processing unit (36) for operating either of the first relay set and the second relay set, and inspecting a voltage between the pair of branch lines, and performing deposition diagnosis of the second relay set. The diagnosis processing unit (36) performs deposition diagnosis of respective relays included in the second relay set in a processing period of system start-up of the electric vehicle, a processing period of use finish of the branch lines, or in both of processing periods, and performs deposition diagnosis of one or less relay in one processing period.SELECTED DRAWING: Figure 1

    【課題】リレーの切り替え回数の増加を抑制しつつリレーの溶着診断を行うことのできる電動車両のリレー診断装置を提供する。【解決手段】一対の電源ライン(L0)をそれぞれ開閉する第1リレーセット(B1)と、一対の電源ラインから分岐した一対の分岐ライン(L1)をそれぞれ開閉する第2リレーセット(B2)とを有する電動車両に搭載される電動車両のリレー診断装置(33)である。そして、第1リレーセット及び第2リレーセットのいずれかのリレーを動作させ、かつ、一対の分岐ライン間の電圧を検査し、第2リレーセットの溶着診断を行う診断処理部(36)を備え、診断処理部(36)は、電動車両のシステム起動の処理期間、分岐ラインの使用終了の処理期間、あるいは、これら両方の処理期間に、第2リレーセットに含まれる個々のリレーの溶着診断を行い、かつ、1回の処理期間に1個以内のリレーの溶着診断を行う。【選択図】図1


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    Title :

    RELAY DIAGNOSTIC DEVICE FOR ELECTRIC VEHICLE


    Additional title:

    電動車両のリレー診断装置


    Contributors:

    Publication date :

    2020-04-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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