Battery discharge control system and method for vehicle having electric motor

Abstract

Disclosed are a battery discharge control system and a method for a vehicle having electric motor. The battery discharge control system and method for a motor-driven vehicle may monitor an SOC of an auxiliary battery in real time and control electric power supply to a first electric component, a wireless communication module, a vehicle controller, and a second electric component which is an always-on component, based on a predetermined order according to the SOC of the auxiliary battery, thereby inhibiting the complete discharge of the auxiliary battery and eliminating driver's discomfort.

Description

technical field [0001] The present invention relates to a battery discharge control system and method for a motor vehicle to reduce or minimize battery discharge. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] As is well known, hybrid vehicles, electric vehicles, hydrogen fuel cell vehicles, etc. are equipped with a motor as a driving source for travel, and such vehicles are called environment-friendly vehicles or motor vehicles. [0004] A motor vehicle is equipped with an auxiliary battery as a power source for various controllers and electrical components (for example, lights, audio, instrument panel, air conditioner, etc.), and a high-voltage battery as a power source for a running motor and the like. [0005] Considering the fact that the auxiliary battery is only used to supply power to various controllers when the motor vehicle is started, ...

AI Technical Summary

Problems solved by technology

[0009] However, we found that when the battery saving function that limits the use of electrical parts is applied, the power to all electrical parts is cut off, so there is a problem that the operation of locking or unlocking the car doors cannot be performed using the smart key, and as a result, the use of the car doors occurs. Discomfort caused by the key performing a manual locking or unlocking operation

[0010] For example, the doors cannot be locked or unlocked because power cannot be supplied to the door lock module that communicates with the smart key owned by the driver, and the doors need to be locked or unlocked by inserting the door key into the keyhole in the door's exterior handle

[0011] As another example of the prior art, when the auxiliary battery is reset, a method of charging the auxiliary battery from a high voltage battery is applied, but when the state of charge (SOC) of the auxiliary battery is a predetermined level or lower, the There is the discomfort of requiring the driver to reset the auxiliary battery through a predetermined procedure due to a power cut

[0012] However, we found that when the power supply to the electrical parts is cut off until the auxiliary battery is charged, the operation of locking or unlocking the doors with the smart key also becomes impossible, and as a result, there is an uncomfortable feeling that manual operation with the door key is required. lock or unlock operation

[0013] As mentioned above, due to the conventional battery saving function and the power-off function of the auxiliary battery, the lock and unlock operation of the door cannot be performed with the smart key, so there will be quality problems that cause the driver to feel uncomfortable

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