Device and method for controlling rechargeable battery, including warning a user to subject the rechargeable battery to a diagnosis

摘要

The calculation unit converts into a battery age each parameter calculated for a different factor of degradation of a battery. If at least one of the battery ages has reached an upper limit age, the determination unit determines that it is necessary to conduct a battery diagnosis. Once it has been determined that it is necessary to conduct the battery diagnosis, the display control unit causes a display device to display a diagnosis request message. After displaying the diagnosis request message has started if there is no result of the battery diagnosis received the electric power limiter unit limits electric power charged to and discharged from the battery. After the electric power charged to/discharged from the battery is limited if there is no result of the battery diagnosis received the start-up prohibition unit prohibits starting a system driving the vehicle.

主权项

1. A device for controlling a rechargeable battery which can be subjected to a diagnosis of a degraded state by a diagnostic device, comprising:
a determination unit that determines, from a history of how the rechargeable battery has been used, whether it is necessary to conduct said diagnosis; a warning unit that warns a user to subject the rechargeable battery to said diagnosis when said determination unit determines that it is necessary to conduct said diagnosis; and a restriction unit that restricts an output of the rechargeable battery if said warning unit warns the user to subject the rechargeable battery to said diagnosis and thereafter a predetermined period of time elapses, and despite that said diagnosis is still not conducted, wherein said determination unit determines whether it is necessary to conduct said diagnosis for each of a plurality of parameters including at least two of: a period for which the rechargeable battery is used; an integrated value of a period of time for which the rechargeable battery has voltage exceeding a reference value; an integrated value of a portion of a current charged to the rechargeable battery that exceeds a predetermined value; and an integrated value of a current discharged from the rechargeable battery.