EV Battery Thermal Control via Server Ambient Data
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Solution Overview
Problem
Existing electric vehicle battery temperature estimation methods, such as those in JP 2014-66542 A, fail to accurately account for variations due to mount structure and control history, leading to inadequate temperature adjustments, which can result in battery deterioration and performance issues.
Innovation Solution
An electric vehicle system that includes a sensor to detect battery temperature, a communication circuit to gather ambient temperature data from a server, and a control circuit to selectively switch temperature adjustment modes based on both battery and ambient temperature data, using a temperature increasing or cooling circuit to maintain optimal battery conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature estimation uses only other vehicle data, then communication overhead is reduced, but temperature estimation accuracy deteriorates due to differences in mount structure and control history
Solution Approach 1:
The patent combines two data sources: temperature information from other vehicles (via communication circuitry) and ambient temperature data from the server (via communication with external database). By merging these data sources, the system achieves more accurate temperature estimation that accounts for both environmental conditions and vehicle-specific characteristics.
Solution Approach 2:
The server stores and provides ambient temperature data that can be universally applied to multiple vehicles. This multi-functional data source serves both as an environmental reference and as a basis for comparing with other vehicle data, enabling the system to adapt to different vehicles with different mount structures and control histories.
2Reliability
If battery temperature is not accurately adjusted, then system simplicity is maintained, but battery deterioration occurs and performance decreases
Solution Approach 1:
The control circuitry continuously monitors battery temperature and compares it with the estimated temperature derived from multiple data sources. Based on this feedback, the system adjusts the temperature adjusting circuitry's operation to maintain optimal battery temperature, preventing deterioration while managing complexity through intelligent control.
Solution Approach 2:
The system performs preliminary temperature estimation using ambient temperature data and other vehicle data before actual battery temperature deviation occurs. This allows the control circuitry to proactively adjust temperature control measures before performance degradation or deterioration happens.
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 precise temperature adjustments, reducing battery deterioration and ensuring continuous operation by considering both internal and external temperature factors, thereby extending battery lifespan and preventing freezing or overheating.
Implementation Method 1
the temperature increasing circuitry is configured to increase the temperature of the battery by using electric power of the battery
Implementation Method 2
the cooling circuitry is configured to decrease the temperature of the battery
Data Source
AI summary
An electric vehicle includes a battery that stores electric power for traveling, a sensor that detects the temperature of the battery, a communication circuitry configured to communicate with a server configured to collect information as to a plurality of vehicles, a temperature adjusting circuitry configured to adjust the temperature of the battery, and a control circuitry configured to control the temperature adjusting circuitry. The information as to the vehicles includes at least an ambient temperature in a surrounding area of each vehicle. The control circuitry selectively switches the mode of operation of the temperature adjusting circuitry by using the temperature of the battery and the ambient temperature collected in the server.