EV Battery Preheating Control Before Route-Based Charging
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Solution Overview
Problem
There is a need to prevent an increase in battery charging time while improving energy efficiency in vehicles, particularly in electric vehicles, as existing methods do not effectively manage battery temperature for efficient charging and waste heat recovery.
Innovation Solution
A control method and device that execute preheating and waste heat recovery controls to ensure the battery is at a predetermined temperature before charging, prioritizing preheating over waste heat recovery when the target temperature is higher than the waste heat recovery temperature to prevent energy efficiency deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the air conditioner executes heating using waste heat of the battery, then energy efficiency is improved, but the battery temperature may drop below the target temperature needed for efficient charging
Solution Approach 1:
The control device executes preheating control before the vehicle arrives at the charging station, raising the battery temperature to the target temperature in advance. This preliminary action ensures that when charging begins, the battery is already at the optimal temperature for efficient charging, preventing the need to interrupt charging for temperature adjustment.
Solution Approach 2:
The control device dynamically switches between preheating control and waste heat recovery control based on real-time battery temperature conditions. When the battery temperature is below the target temperature, preheating control is executed; when it reaches or exceeds the target temperature, waste heat recovery control is executed. This dynamic adjustment optimizes both energy efficiency and battery temperature management.
2Productivity
If preheating control is executed to raise battery temperature to target temperature, then charging efficiency is improved, but energy consumption increases
Solution Approach 1:
Preheating is executed in advance during periods when the vehicle is not charging, utilizing off-peak energy consumption to prepare the battery for efficient charging. This approach separates the energy consumption for heating from the charging process itself, improving overall charging efficiency without compromising energy management.
Solution Approach 2:
The control device adjusts the battery temperature to an optimal range that maximizes charging efficiency. By controlling the battery temperature within a specific parameter range (target temperature), the system achieves faster and more efficient charging while managing energy consumption through intelligent timing and temperature regulation.
3Loss of time
If the battery temperature is maintained at target temperature before charging, then charging time is reduced, but the complexity of temperature management increases
Solution Approach 1:
The system performs preliminary temperature adjustment before charging by executing preheating control in advance. This ensures the battery reaches the target temperature before the vehicle arrives at the charging station or before charging begins, thereby reducing charging time without requiring complex real-time temperature management during the charging process itself.
Solution Approach 2:
The control device continuously monitors battery temperature and automatically switches between preheating control and waste heat recovery control based on temperature feedback. When the battery temperature reaches or exceeds the target temperature, the system automatically transitions to waste heat recovery control, simplifying temperature management through intelligent feedback-based decision making.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces battery charging time and improves energy efficiency by maintaining an optimal battery temperature before charging, preventing energy loss and ensuring efficient power consumption.
Implementation Method 1
a heating device configured to heat the battery
Implementation Method 2
an air conditioner configured to heat a passenger compartment using waste heat of the battery
Data Source
AI summary
In a case where a battery is scheduled to be charged at charging equipment included in a scheduled travel route of a vehicle, a preheating control for heating the battery by the heating device is executed before the vehicle arrives at the charging equipment such that a temperature of the battery when the vehicle arrives at the charging equipment reaches a predetermined target temperature, and in response to a temperature of the battery reaching a predetermined waste heat recovery temperature, a waste heat recovery control for enabling an air conditioner to execute heating using waste heat of the battery is executed. In response to a current temperature of the battery being higher than the waste heat recovery temperature and the target temperature being higher than the waste heat recovery temperature, executing the preheating control while restricting execution of the waste heat recovery control.