Patent ID: 6255826
Filing Date: 2001-07-03
Classification: B60K,B60L,G01R,H02J,Y02T,Y10S

Abstract:
A battery voltage measuring device in which a plurality of secondary batteries connected in series is divided into a plurality of blocks constituted of at least one secondary battery, and which measure the voltage of each block, comprising:a voltage measuring device provided on each of said blocks for measuring the voltage of said blocks;a noise filter provided before said voltage measuring device and having a capacitor; anda measuring line breakage detecting resistor, which is interposed between each of said blocks and said voltage measuring devices, and is connected in parallel to said blocks;wherein the resistance ratio of the measuring line breakage detection resistors corresponding to adjacent blocks is set at the value in which the voltage value divided by said measuring line breakage detection resistors at the time of breakage of the measuring line becomes a voltage value not normally detected when the measuring line is not broken.