Vehicle Battery Recharge Wake-Up Control for Sleep Power Saving

Solution Overview

Problem

Existing vehicle control systems consume unnecessary power from the low voltage battery by frequently waking up the vehicle network to check if the high voltage battery's state of charge is sufficient for recharging the low voltage battery.

Innovation Solution

An apparatus and method for controlling a vehicle that prevents unnecessary power consumption by only waking up the vehicle network and turning on the IGN3 power when the low voltage battery's state of charge falls below a threshold and the high voltage battery's state of charge is sufficient for recharging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the vehicle network frequently wakes up to check high voltage battery SOC for low voltage battery recharging, then the recharging operation can be performed when needed, but unnecessary power is consumed from the low voltage battery

Engineering Contradiction:

Improverecharging operation availabilityVSAvoidlow voltage battery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary action by storing the high voltage battery's SOC value at the time when IGN3 power is turned off. This allows the vehicle network to remain in sleep mode and avoid frequent wake-ups, while still being able to determine whether recharging is possible by comparing the stored SOC value with a reference value when recharging is needed.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The sensor automatically acquires and stores the high voltage battery's SOC value without requiring the vehicle network to be active. This self-service mechanism allows the system to prepare recharging information in advance, enabling the vehicle network to stay dormant and conserve low voltage battery power.

Inventive Principle:

Principle #25Self-service

2Use of energy by moving object

If the vehicle network remains in sleep mode to conserve power, then power consumption is reduced, but the system cannot respond to urgent recharging needs

Engineering Contradiction:

Improvelow voltage battery power consumptionVSAvoidurgent recharging response capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system performs preliminary action by storing the high voltage battery's SOC value at the time when IGN3 power is turned off. This allows the vehicle network to remain in sleep mode and avoid frequent wake-ups, while still being able to determine whether recharging is possible by comparing the stored SOC value with a reference value when recharging is needed.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses feedback by comparing the stored high voltage battery SOC value with a reference value to determine whether to wake up the vehicle network for recharging. This feedback mechanism ensures that the system only activates when necessary, balancing power conservation with urgent recharging needs.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If the system checks high voltage battery SOC frequently, then accurate recharging decisions can be made, but the vehicle network wakes up unnecessarily consuming power

Engineering Contradiction:

ImproveSOC comparison accuracyVSAvoidlow voltage battery power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary action by storing the high voltage battery's SOC value at the time when IGN3 power is turned off. This allows the vehicle network to remain in sleep mode and avoid frequent wake-ups, while still being able to determine whether recharging is possible by comparing the stored SOC value with a reference value when recharging is needed.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system creates a copy of the high voltage battery's SOC value at the time of IGN3 power shutdown and stores it in the sensor. This copy allows subsequent recharging decisions to be made without accessing the actual battery management system, eliminating the need for frequent wake-ups while maintaining measurement accuracy.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS20250178478A1Apparatus and method for controlling a vehicle

Publication Date: 2025.06.05 HYUNDAI MOTOR CO LTD

AI summary

An apparatus for controlling a vehicle includes a sensor to determine whether to transmit a signal related to a recharging operation for a low voltage battery. The apparatus also includes a processor configured to determine whether to wake up, based on whether the signal related to the recharging operation for the low voltage battery is received and to determine whether to perform the recharging operation for the low voltage battery, in response to the signal related to the recharging operation for the low voltage battery when waking up.