EV Battery Charging Performance Control via Temperature-Based Level Selection

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Solution Overview

Problem

Electric vehicles face challenges in maintaining optimal battery temperature for efficient charging, as existing systems lack effective battery state information regarding charging performance, making it difficult to control battery temperature efficiently and secure fast-charging capabilities.

Innovation Solution

A method that provides battery state information associated with charging performance, allowing drivers to manage battery temperature optimally before charging, using a controller to categorize charging performance levels based on temperature data and select appropriate heating or cooling modes, and navigates to optimal charging stations using GPS.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If battery charging is performed without temperature control, then charging process is simple, but charging performance is remarkably reduced

Engineering Contradiction:

Improvecharging performanceVSAvoidtemperature control system

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system performs preliminary temperature assessment before charging by determining battery state information based on temperature and charging time. This preliminary action identifies whether temperature control is needed before charging begins, preventing performance loss while avoiding unnecessary control complexity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system provides feedback to the driver about battery state information and recommended actions. This feedback loop enables the driver to understand the charging performance implications and take appropriate temperature control actions without requiring complex automated control systems.

Inventive Principle:

Principle #23Feedback

2Productivity

If battery temperature is controlled to optimal level, then charging performance is improved, but energy consumption increases

Engineering Contradiction:

Improvecharging performanceVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The system applies partial temperature control only when necessary. By determining battery state information and only recommending control actions when the battery is in suboptimal temperature ranges, the system achieves performance improvement without unnecessary energy consumption from continuous temperature control.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system changes the approach from continuous temperature control to conditional control based on determined battery state parameters. By monitoring temperature and charging time parameters and only initiating control when parameters indicate suboptimal conditions, energy consumption is reduced while maintaining charging performance when needed.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If battery state information is provided to driver, then driver can control battery temperature, but system complexity increases

Engineering Contradiction:

Improvebattery temperature controlVSAvoidinformation processing system

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The system enables the driver to self-manage battery temperature by providing clear battery state information and recommendations. Instead of requiring complex automated control systems, the driver uses the provided information to take appropriate actions themselves, simplifying the overall system while improving ease of operation.

Inventive Principle:

Principle #25Self-service

4Speed

If fast charging is performed at high temperature, then charging speed increases, but battery damage risk increases

Engineering Contradiction:

Improvecharging speedVSAvoidbattery safety

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The system performs preliminary determination of battery state information before fast charging begins. By assessing temperature and charging time parameters in advance, the system identifies high-temperature conditions that would risk battery damage and provides warnings or recommendations to prevent fast charging under unsafe conditions.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system takes preliminary anti-action by warning the driver about high-temperature conditions before fast charging occurs. This preliminary warning enables the driver to prevent or delay charging, avoiding the harmful effect of fast charging at high temperatures that would compromise battery safety.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS20230150385A1Method of conditioning battery of electric vehicle

Publication Date: 2023.05.18 HYUNDAI MOTOR CO LTD

AI summary

A method of conditioning a battery of an electric vehicle, includes obtaining information on a charging time varying with a battery temperature with respect to a battery through testing, and providing, to a controller, charging performance setting information that results from setting by categorizing battery charging performance into a plurality of levels based on the obtained information on the charging time varying with the battery temperature; determining, by the controller, a charging time corresponding to a current battery temperature measured through a sensor, from the measured current battery temperature using the information on the charging time varying with the battery temperature; selecting, by the controller, a level indicating current battery charging performance from the determined charging time corresponding to the current battery temperature using the charging performance setting information; and displaying, by the controller, the selected level on a display device of a vehicle.