EV Charging Control Device Temperature-Adaptive Current
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Solution Overview
Problem
Electric vehicle batteries deteriorate quickly when exposed to high temperatures, leading to reduced performance, longer charging times, and potential safety risks, as existing charging methods either prolong charging or risk battery damage or explosion.
Innovation Solution
An electric vehicle charging control device with a temperature sensor and processor that adjusts the charging current based on temperature thresholds, allowing fast charging while preventing overheating by switching to constant-voltage or slow charging when necessary, and restarting fast charging when safe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If fast charging is performed using high current, then charging time is reduced, but battery temperature increases leading to deterioration or safety risks
Solution Approach 1:
The charging control device dynamically adjusts the charging current based on real-time battery temperature measurements. When temperature exceeds a threshold, the device automatically reduces current from fast charging level to slow charging level, and when temperature returns to safe levels, it resumes fast charging. This dynamic adaptation resolves the contradiction by allowing high current only when thermally safe.
Solution Approach 2:
The system implements a feedback loop where the temperature sensor continuously monitors battery temperature and feeds this information to the charging control device. The controller uses this feedback to adjust charging current in real-time, creating a closed-loop control system that balances charging speed with thermal safety.
2Reliability
If charging current is reduced to prevent overheating, then battery safety is improved, but charging time increases
Solution Approach 1:
The charging process alternates between fast charging periods (when temperature is safe) and slow charging periods (when temperature exceeds threshold). This periodic switching between charging modes allows the system to achieve overall fast charging while periodically reducing current to maintain thermal safety, resolving the contradiction between speed and safety.
Solution Approach 2:
The system changes the charging current parameter dynamically based on temperature conditions. Instead of maintaining a constant conservative current that would ensure safety but slow charging, the system varies the current parameter between high and low levels, achieving both safety and acceptable charging time through parameter adaptation.
3Reliability
If temperature threshold for fast charging is set low, then battery safety is improved, but charging efficiency decreases
Solution Approach 1:
The battery effectively manages its own charging process by providing temperature information through the sensor, and the charging control device uses this self-provided information to determine appropriate charging current. This self-service approach allows the system to optimize charging efficiency while maintaining safety, as the battery's actual thermal state directly controls the charging parameters.
4Productivity
If temperature threshold for fast charging is set high, then charging efficiency is improved, but battery deterioration or explosion risk increases
Solution Approach 1:
Rather than using a fixed high temperature threshold that would risk safety, the system dynamically determines the safe operating threshold based on real-time temperature monitoring. The charging control device adjusts the effective threshold adaptively, allowing efficient charging when safe and preventing dangerous conditions, thus resolving the contradiction between efficiency and safety risks.
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
Maximizes fast charging efficiency while preventing battery deterioration and accidents by dynamically managing charging currents based on temperature, reducing charging time and extending battery life.
Implementation Method 1
a temperature sensor configured to sense a temperature of a battery to be charged and generate temperature information
Implementation Method 2
In order to quickly charge the battery of an electric vehicle, a high current must be supplied to the battery, which may cause an increase in the temperature of the battery
Data Source
AI summary
The present disclosure relates to an electric vehicle charging control device and method thereof capable of changing a charging method according to the temperature of a battery mounted in an electric vehicle to maximize the efficiency of fast charging while preventing battery deterioration and accidents. The electric vehicle charging control device may be formed in the electric vehicle and include a temperature sensor configured to sense a temperature of a battery to be charged and generate temperature information, a processor, and a memory coupled to the processor. The memory may be configured to store program commands that are executable by the processor, and cause the processor to perform fast charging of the battery by using a maximum current value that maintains a temperature less than a present second threshold temperature when the temperature information is greater than or equal to a preset first threshold temperature.