EV Battery Self-Heating Control for Scheduled Temperature Readiness
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Solution Overview
Problem
Existing battery temperature control methods struggle to heat batteries to a desired temperature range by the time they need to be heated, due to limited heating capacity of conventional heaters.
Innovation Solution
The method predicts the scheduled time by which the battery temperature needs to be within a desired range and uses charge/discharge control to raise the battery temperature, leveraging the battery's own heat production to achieve the desired temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heater with limited heating capacity is used to heat the battery ahead of time, then the battery temperature control system can maintain battery temperature, but it is difficult to raise the battery temperature to the desired temperature range by the scheduled time
Solution Approach 1:
The battery heats itself by repeating charge/discharge cycles, utilizing its own internal resistance to generate heat. This self-heating mechanism eliminates the need for external heating devices with limited capacity, allowing the battery to reach the desired temperature range by the scheduled time through controlled charge/discharge operations.
Solution Approach 2:
The system changes the operating parameters of the battery by controlling charge/discharge current and cycle frequency to generate sufficient heat. By adjusting these parameters, the battery can produce the required thermal energy to raise its temperature to the desired range within the available time, overcoming the limitation of conventional heaters.
2Temperature
If charge/discharge control is repeated to raise battery temperature, then the battery can be heated to the desired temperature range, but additional time and energy cycles are required
Solution Approach 1:
The system performs preliminary charge/discharge control operations before the scheduled time when battery heating is needed. By anticipating the temperature requirement and initiating heating cycles in advance, the battery reaches the desired temperature range by the scheduled time, avoiding delays in actual operation.
Solution Approach 2:
The charge/discharge control is performed continuously or repeatedly until the battery reaches the desired temperature range. This continuous useful action ensures that heating progresses steadily without interruption, minimizing the total time required to achieve the target temperature by the scheduled time.
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 allows for efficient heating of the battery to the desired temperature range by utilizing its own produced heat, ensuring the battery is ready for use by the scheduled time, thereby enhancing performance and reducing the need for additional heating devices.
Implementation Method 1
repeating charge/discharge control of the battery as battery temperature control ahead of the scheduled time to raise the temperature of the battery to the desired temperature range by the scheduled time
Data Source
AI summary
A battery temperature control method and a battery temperature control device uses a controller to execute a temperature control of a chargeable/dischargeable battery installed in an electric vehicle. The controller acquires battery information including a temperature of the battery, a current temperature of the battery and a heat capacity of the battery, and predicts a scheduled time at which the temperature of the battery will be within a desired temperature range, or acquiring information pertaining to the scheduled time. The controller raises the temperature of the battery to the desired temperature range by the scheduled time by repeating a charge/discharge control of the battery as a heating control of the battery prior to the scheduled time where the temperature of the battery is below the desired temperature range.