Vehicle Charge Control Device Advancing Start Time for Battery Heating
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Solution Overview
Problem
Existing charge control systems for electric vehicles face challenges in completing battery charging within a predetermined time without increasing the capacity and cost of the heater, especially when battery heating and charging are simultaneous, leading to potential shortages in charging power.
Innovation Solution
The system advances the start time of battery charging by a calculated amount to accommodate the extended time required for heating, allowing simultaneous battery heating and charging, thereby avoiding power shortages and reducing the need for a more powerful heater.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the battery is heated before starting charge to complete charging within a predetermined time, then the charge completion time is improved, but the heater capacity and cost increase
Solution Approach 1:
The system performs preliminary heating of the battery before the scheduled charge time when the battery temperature is below the reference temperature. By detecting the battery temperature in advance and initiating heating only when necessary, the system prepares the battery for optimal charging conditions without requiring an oversized heater capable of heating during the entire charge period.
Solution Approach 2:
The system utilizes the battery's own thermal characteristics and ambient conditions to determine heating requirements. By monitoring battery temperature and comparing it with the reference temperature, the system decides whether heating is needed, allowing the battery to self-regulate its thermal state based on actual conditions rather than requiring continuous high-capacity heating.
2Power
If the battery is heated during the charge period, then the charge time is extended, but the heater capacity can be reduced
Solution Approach 1:
Instead of heating during the charge period, the system performs heating action before the scheduled charge time begins. This preliminary heating ensures the battery reaches the reference temperature in advance, allowing the charge to start immediately at the scheduled time without extension, while still using a smaller heater capacity.
3Loss of time
If the charge start time is advanced to accommodate simultaneous heating and charging, then the charge completion time is maintained, but the charging efficiency is reduced
Solution Approach 1:
The system performs heating as a preliminary action before the scheduled charge time rather than simultaneously during charging. By completing the heating process in advance when the battery temperature is below the reference temperature, the system avoids the need to advance the charge start time, thereby maintaining charging efficiency while still ensuring charge completion within the predetermined time frame.
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 ensures timely completion of battery charging while minimizing the required heater capacity and cost, ensuring efficient charging without power shortages, even when battery heating is prolonged.
Implementation Method 1
a battery heater (15) that heats the battery (11)
Data Source
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AI summary
When completion of timer charge before elapse of a designated time is designated by a timer charge reservation means for allowing a user to designate a predetermined charge time zone and a target amount of electric power to be charged to the battery, a timer charge start time is determined. Upon carrying out the timer charge, when it is predicted that the timer charge and battery heating are simultaneously carried out, a required amount of extension of a charge time period is determined so as to complete charge of the battery by the designated time, and starts charge of the battery at a time advanced relative to the timer charge start time by the required amount of extension of a charge time period. With this control, charge of the battery can be completed at a predetermined time without unnecessary enhancement in a required capacity of a battery heater.