EV Battery Charging via Motor and Converter Pre-heating
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Solution Overview
Problem
Electric vehicle batteries face prolonged charging times during low-temperature conditions, which affects their performance and marketability.
Innovation Solution
A battery charging apparatus and method that utilizes a temperature sensor and controller to discharge the battery using a low voltage converter or motor based on temperature thresholds, followed by charging when discharging is complete or exceeds a time threshold, thereby reducing charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery is charged during low-temperature conditions, then the charging process can be performed, but the charging time is prolonged
Solution Approach 1:
The system performs preliminary heating of the battery using the motor and low voltage converter before charging begins. By pre-warming the battery to an appropriate temperature range, the charging process can proceed efficiently without the prolonged charging times associated with cold battery conditions.
Solution Approach 2:
The system dynamically changes the temperature parameter of the battery by controlling the motor and low voltage converter to heat the battery before charging. This parameter change from low temperature to optimal temperature enables faster charging rates and reduces overall charging time.
2Temperature
If the battery is discharged using the motor at very low temperatures, then the battery can be warmed up, but the system complexity increases
Solution Approach 1:
The motor and low voltage converter are designed to perform multiple functions: they serve as both the motor drive system for vehicle operation and as a heating device for battery temperature management. This multi-functionality allows the system to warm the battery without adding dedicated heating components, thereby avoiding increased system complexity.
Solution Approach 2:
The battery heating function is achieved using the motor and power conversion equipment that are already part of the electric vehicle system. The system uses its own existing components to service the heating need, eliminating the requirement for separate heating infrastructure and maintaining system simplicity.
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 effectively reduces battery charging time during low temperatures, improving the performance and marketability of electric vehicles by managing temperature-dependent discharging and charging processes.
Implementation Method 1
discharge the battery using the low voltage converter
Implementation Method 2
discharge the battery using the motor
Implementation Method 3
charge the battery using any one of a low voltage converter and a motor
Data Source
AI summary
A battery charging apparatus and method of an electric vehicle are provided. The battery charging apparatus includes a temperature sensor that is configured to sense a temperature of a battery. In addition, a controller is configured to discharge the battery and then charge the battery using any one of a low voltage converter and a motor based on the temperature.