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1. (WO2015045226) POWER SOURCE SWITCHING DEVICE AND STORAGE BATTERY SYSTEM

Pub. No.:    WO/2015/045226    International Application No.:    PCT/JP2014/003344
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Jun 24 01:59:59 CEST 2014
IPC: H01H 47/00
H02J 9/06
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: KURANUKI, Masaaki
倉貫 正明
KUBO, Masahiko
久保 昌彦
Title: POWER SOURCE SWITCHING DEVICE AND STORAGE BATTERY SYSTEM
Abstract:
The output from a first alternating current power source supplied through a first relay or the output from a second alternating current power source supplied through a second relay is fed to a load by a third relay switching therebetween. A welding detection unit detects welding in the first relay. When switching from feeding the output from the first alternating current power source to the load to feeding the output from the second alternating current power source to the load, a power source switching control unit causes the first relay to switch from the closed state to the open state, causes switching of the third relay so that the output from the second alternating current power source is selected and supplied, and then, prohibits switching of the second relay from the open state to the closed state until a first relay welding detection process at the welding detection unit is completed.