Vehicle control devices

Abstract

To provide a vehicle control device that can determine the dark current of a battery with an inexpensive configuration. [Solution] The vehicle control device 100, which estimates the dark current of an auxiliary battery 3 that supplies power to a vehicle load 2, includes an on-time discharge amount calculation unit 5d that calculates the amount of discharge of the auxiliary battery 3 while the vehicle power is on, which is the amount of discharge of the auxiliary battery 3 from when it is determined that the auxiliary battery 3 is fully charged after the vehicle power is turned on until the vehicle power is turned off, and an on-time charge amount calculation unit 5e that calculates the amount of charge to the auxiliary battery 3 while the vehicle power is on, which is the amount of charge to the auxiliary battery 3 from when the vehicle power is turned off until it is determined that the auxiliary battery 3 is fully charged again after the vehicle power is turned on for the next time. The dark current estimation unit 5f estimates the dark current while the vehicle power is off based on the difference between the amount of discharge while the vehicle power is on calculated by the on-time discharge amount calculation unit 5d and the amount of charge while the vehicle power is on calculated by the on-time charge amount calculation unit 5e.

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