Patent ID: 11949257
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  G  Y | IPC B  G  H

Claim 0:
1. A management device comprising:
a voltage detector that detects a voltage, the voltage being each of voltages detected from a plurality of cells connected in series; and
a controller that executes (1) an equalization process of equalizing capacities of the plurality of cells based on the voltages detected from the plurality of cells and (2) a cell abnormality determination process of, of the voltages detected from the plurality of cells, calculating, as a first voltage difference, each of voltage differences between a representative voltage based on the voltage of at least one cell to be compared and the voltage of one cell to be detected at a first time and calculating, as a second voltage difference, each of voltage differences between the representative voltage based on the voltage of the at least one cell to be compared and the voltage of one cell to be detected at a second time, and when a difference between the first voltage difference and the second voltage difference is greater than or equal to a threshold value, determining that the one cell to be detected is abnormal,
wherein in a case of executing the cell abnormality determination process during the equalization process, the controller adds a compensation value corresponding to a voltage change based on energy transfer in the target cell due to the equalization process between the first time and the second time to the voltage of a target cell to be subjected to the equalization process, and calculates the second voltage difference at the second time.