Method for inspecting relay contacts for contact weld in battery power source device
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United States of America Patent
Stats
-
Dec 7, 2004
Grant Date -
Apr 1, 2004
app pub date -
Dec 30, 2002
filing date -
Jan 10, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for inspecting relay open/close contacts for a contact weld is provided, each relay open/close contact being connected serially to each of a plurality of battery pack blocks. Battery ECUs for controlling the operating condition of each of the battery pack blocks employ one battery pack block for transmitting an inspection signal and the other battery pack blocks for receiving the inspection signal, such that the transmitting battery ECU transmits the inspection signal with its open/close contact closed. When any one of the other battery pack blocks receives the inspection signal at its battery ECU in which its open/close contact has not been closed, the open/close contact is determined to be welded. This inspection is performed successively with the transmitting and receiving battery ECUs being employed alternately in order to check the plurality of open/close contacts and their secondary open/close contacts for a contact weld.
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