PROTECTION SYSTEM FOR ELECTROMAGNETIC RELAY

• Main Author: KARASAWA YUKIO
• Format: Patent
• Language: English; Japanese
• Published: 27.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; EMERGENCY PROTECTIVE DEVICES; GENERATION; RELAYS; SELECTORS

To provide a protection system for an electromagnetic relay for preventing conduction failure of a contact point due to freezing of the electromagnetic relay with a simple configuration.SOLUTION: A protection system 10 for an electromagnetic relay prevents, in advance, occurrence of connection failure due to freezing of the electromagnetic relay (a positive electrode side electromagnetic relay 18 and a negative electrode side electromagnetic relay 22) mounted on a battery pack 12 of a vehicle, and includes: temperature detection means 34 for sequentially measuring and storing ambient temperature of a place where the electromagnetic relay is installed; cooling means 30 for cooling a power line 24 connected to a fixed terminal of the electromagnetic relay; and a control unit 32 for operating the cooling means 30 to cool the power line 24 when it is determined that the electromagnetic relay may freeze based on temperature information from the temperature detection means 34.SELECTED DRAWING: Figure 1 【課題】簡単な構成で電磁リレーの凍結による接点の導通不良を防止する電磁リレーの保護システムを提供する。【解決手段】車両の電池パック１２に搭載された電磁リレー（正極側電磁リレー１８、負極側電磁リレー２２）の凍結による接続不良の発生を未然に防止する電磁リレーの保護システム１０において、電磁リレーが設置された場所の環境温度を逐次測定して記憶する温度検知手段３４と、電磁リレーの固定端子に接続された電力線２４を冷却する冷却手段３０と、温度検知手段３４からの温度情報に基づき、電磁リレーが凍結する怖れが有ると判断したときに、冷却手段３０を作動させて電力線２４を冷却する制御部３２と、を有する。【選択図】図１