Patent ID: 11949258
Assignee: MITSUMI ELECTRIC CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A control system comprising:
a plurality of secondary battery cells electrically coupled in series;
a plurality of power paths each electrically coupled in series with a corresponding secondary battery cell among the plurality of secondary battery cells;
at least one switching element inserted in a given power path;
a secondary battery protection apparatus configured to control the switching element such that the secondary battery cells are protected; and
a device configured to control balance among cell voltages for the respective secondary battery cells,
wherein the secondary battery protection apparatus includes:
an anomaly detecting circuit configured to detect an anomaly of the secondary battery cells;
one or more monitoring terminals each provided in a path different from the power paths, each monitoring terminal being operable for monitoring a potential at a negative electrode of a given secondary battery cell among the plurality of the secondary battery cells;
one or more internal lines, each internal line being between the negative electrode of the given secondary battery cell and a given monitoring terminal; and
one or more internal switches, each internal switch being provided in a given internal line and configured to be turned on or off based on a result of anomaly detection performed by the anomaly detecting circuit, and

wherein the device includes a balance control circuit configured to adjust, based on potentials monitored by the one or more monitoring terminals, a current flowing into a line path that includes a corresponding internal line among the one or more internal lines, the balance control circuit being configured to control the balance among the cell voltages for the plurality of the secondary battery cells, based on the adjusted current.