DC Charging Base Temperature Compensation for Delay-Corrected Sensing
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Solution Overview
Problem
Temperature transmission delays in direct current charging bases result in inaccurate temperature measurements, hindering safe, accurate, and rapid charging of electric vehicles.
Innovation Solution
A method and apparatus for temperature compensation in direct current charging bases that involve collecting terminal temperatures, calculating temperature compensation function coefficients based on current values, and using a pre-constructed compensation function to correct temperatures, ensuring accurate and rapid charging by sending corrected temperatures to the vehicle's charging controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature compensation is performed using alternating current charging base, then temperature measurement can be implemented, but measurement precision deteriorates due to electrode polarization and electrolyte temperature changes
Solution Approach 1:
The patent applies periodic action by using direct current charging pulses instead of continuous alternating current. The charging process uses periodic pulse signals with controlled duty cycles (e.g., charging for a period then stopping), which allows the electrochemical battery to stabilize during measurement phases while minimizing polarization effects. This periodic charging approach reduces the harmful temperature changes and polarization compared to continuous AC charging, thereby improving temperature measurement precision.
Solution Approach 2:
The patent changes the electrical parameter from alternating current to direct current pulse signals. By using DC charging pulses with adjustable width and amplitude, the system optimizes the charging process to minimize polarization while maintaining adequate charge levels. The parameter changes include controlling pulse duration (e.g., charging for 1-2 seconds then stopping for 3-5 seconds) and adjusting pulse amplitude based on battery state, which reduces electrolyte temperature fluctuations and improves measurement accuracy.
2Adaptability or versatility
If electrochemical battery is used for temperature compensation, then temperature measurement capability is added, but device complexity increases due to additional charging and measurement circuits
Solution Approach 1:
The patent implements universality by designing the electrochemical battery to serve multiple functions simultaneously: it acts as both the temperature sensing element and the power source for the sensor node. The same battery that provides operating voltage also exhibits temperature-dependent voltage characteristics that can be measured for temperature compensation. This multi-functionality eliminates the need for separate temperature sensing hardware, reducing overall device complexity while maintaining temperature measurement capability.
Solution Approach 2:
The patent merges the temperature measurement function with the power management function by using the electrochemical battery's voltage characteristics for both purposes. The voltage across the battery is continuously monitored - this same voltage signal serves both to determine the charging state and to infer temperature through compensation algorithms. By combining these functions into a single measurement process, the patent reduces the number of separate circuits and components needed.
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 method and apparatus effectively compensate for temperature errors caused by transmission delays, enabling safe, accurate, and rapid charging of electric vehicles by improving temperature measurement accuracy and reliability.
Implementation Method 1
a temperature compensation method for a time domain reflectometer... based on direct current charging base... voltage values... temperature measurement
Implementation Method 2
the existing temperature compensation methods... based on alternating current charging base... electrode polarization and electrolyte temperature changes
Data Source
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AI summary
The present disclosure discloses a method and an apparatus for temperature compensation based on a direct current charging base, and the method includes: collecting a temperature of a direct current charging-base terminal; calculating temperature compensation function coefficients corresponding to different current values; and obtaining a corrected temperature based on the collected temperature of the direct current charging-base terminal, the temperature compensation function coefficients corresponding to the different current values and a pre-constructed temperature compensation function, and the corrected temperature is sent to a charging controller of an electric vehicle. The present disclosure realizes compensation of temperature errors caused by temperature transmission delay during charging of electric vehicles, thereby realizing safe, accurate and rapid charging of vehicles.