Patent ID: 7945402
Filing Date: 2011-05-17
Classification: G01R

Abstract:
1. A monitoring apparatus for a secondary battery including a plurality of assembled batteries, wherein each of said plurality of assembled batteries has a plurality of battery blocks, and in at least one of said plurality of assembled batteries, a number of battery cells constituting each of said plurality of battery blocks is different from a reference number of cells of another of said plurality of assembled batteries, said monitoring apparatus comprising: a voltage detecting circuit detecting an inter-terminal voltage for each of said plurality of battery blocks; and a processing unit calculating a state of charge for each of said plurality of battery blocks, based on said inter-terminal voltage, wherein said processing unit converts said inter-terminal voltage into a voltage per said reference number of cells for a battery block having the number of said battery cells different than said reference number of cells among said plurality of battery blocks, and obtains said state of charge.