VOLTAGE MEASUREMENT DEVICE

A voltage measurement device (12) includes a first measurement circuit (31), a second measurement circuit (32), a cell balance switch (360), and a correction circuit (33). The first measurement circuit (31) is connected to a plurality of first battery cells (211 and 212), a busbar (23), and a plural...

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Bibliographic Details
Main Authors HATANI, Naohisa, MORI, Goro
Format Patent
LanguageEnglish
French
German
Published 10.01.2024
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A voltage measurement device (12) includes a first measurement circuit (31), a second measurement circuit (32), a cell balance switch (360), and a correction circuit (33). The first measurement circuit (31) is connected to a plurality of first battery cells (211 and 212), a busbar (23), and a plurality of second battery cells (221 and 222) via a plurality of first RC filters. The second measurement circuit (32) is connected to the plurality of first battery cells (211 and 212), the busbar (23), and the plurality of second battery cells (221 and 222) via a plurality of second RC filters. The cell balance switch (360) is connected in parallel with the busbar (23) via two second RC filters (511 and 521) connected to the busbar (23). The correction circuit (33) corrects a measurement value measured by the second measurement circuit (32) using a measurement value of voltage between both ends of the busbar (23) measured by the first measurement circuit (31).
Bibliography:Application Number: EP20220763423