EV Battery Charging Thermal Management via Heating Bypass
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Solution Overview
Problem
Electric vehicle batteries, such as lithium-ion batteries, require precise temperature management during charging and discharging to prevent damage and ensure efficient energy transfer, as they can be affected by cold temperatures, leading to interrupted power supply and potential overheating issues.
Innovation Solution
A charging system that includes a heating/cooling management system coupled with a comparator circuit and a control circuit to monitor and regulate battery temperature by including or bypassing a heating element in the charging circuit, ensuring safe and efficient charging operations by maintaining optimal temperature ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a heating element is included in the charging circuit to maintain optimal battery temperature, then charging efficiency is improved, but the risk of overheating increases
Solution Approach 1:
The system continuously monitors battery temperature during charging and uses this feedback to dynamically control the heating element. When temperature drops below the optimal range, heating is activated; when it reaches or exceeds the optimal range, heating is deactivated or reduced, preventing overheating while maintaining charging efficiency
Solution Approach 2:
The heating element's inclusion or bypassing in the charging circuit is not static but dynamically adjusted based on real-time temperature conditions. The system transitions between including the heating element (when cold) and bypassing it (when warm) to optimize charging while preventing overheating
2Speed
If battery temperature is maintained at optimal levels during charging, then charging speed is improved, but system complexity increases due to temperature monitoring and control mechanisms
Solution Approach 1:
The system checks battery temperature before initiating charging and pre-adjusts the heating element configuration accordingly. This preliminary action ensures optimal temperature conditions are established before charging begins, maximizing charging speed without requiring complex continuous control mechanisms
Solution Approach 2:
The battery management system automatically monitors temperature and controls the heating element without external intervention. The system self-regulates by comparing temperature readings against optimal ranges and autonomously deciding whether to include or bypass the heating element, reducing the need for complex external control systems
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
The system ensures reliable and efficient battery charging by preventing overheating and maintaining optimal temperature conditions, thereby extending battery life and ensuring consistent energy supply for electric vehicles.
Implementation Method 1
A charging system is provided which includes a heating/cooling management system... including or bypassing a heating element in the charging circuit
Data Source
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AI summary
An apparatus including a rechargeable battery pack installed in an electric vehicle, the rechargeable battery pack coupled to a power supply, the power supply operable to provide a charge voltage to perform charging operations on the battery pack, a heating element to heat a fluid to be circulated through the rechargeable battery pack, a comparator circuit to compare a battery voltage of the rechargeable battery pack to a line source voltage, the comparator circuit operable to compare the battery voltage to the line source voltage and to provide an output signal when the battery voltage is less than a line voltage offset value, and a control circuit coupled to receive the output signal of the comparator, and to couple the line source voltage to the power supply, and to bypass the heating element if the comparator is not providing the output signal.