EV Battery Health Protection via Bidirectional Charging Temperature Control
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Solution Overview
Problem
Conventional vehicle-to-grid systems do not consider battery health factors, such as temperature, during bidirectional charging, which can lead to degradation and reduce the lifespan of electric vehicle batteries.
Innovation Solution
The system uses temperature data to determine whether discharging the electric vehicle battery will be harmful and adjusts the discharge amount to prevent damage, ensuring battery health during revenue-generating and cost-saving activities like vehicle-to-grid operations by integrating temperature data with energy needs and ambient conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bidirectional charging is performed without considering battery temperature, then revenue generation and cost saving activities can be conducted, but battery health deteriorates and lifespan is reduced
Solution Approach 1:
The system continuously monitors battery temperature and uses this feedback to dynamically adjust discharge decisions. The processor receives temperature data, determines whether discharging will be harmful based on current temperature conditions, and adjusts the discharge amount accordingly, creating a closed-loop control system that balances revenue generation with battery health protection
Solution Approach 2:
The system dynamically adjusts the discharge amount based on real-time temperature conditions rather than using fixed discharge parameters. The discharge strategy changes adaptively according to battery temperature, allowing maximum discharge when cool and reduced discharge when warm, optimizing both revenue and battery longevity
2Duration of action of stationary object
If battery discharge is limited to protect battery health, then battery lifespan is extended, but revenue generation potential is reduced
Solution Approach 1:
The system changes the discharge parameter (discharge amount) based on temperature conditions. When battery temperature is low, the system allows higher discharge amounts to maximize revenue. When temperature rises, the system reduces discharge amounts to protect battery health, thereby extending lifespan while capturing revenue opportunities when conditions are favorable
3Productivity
If battery discharge is allowed without temperature monitoring, then maximum revenue can be generated, but battery degradation increases
Solution Approach 1:
Temperature data serves as an intermediary parameter that mediates between revenue generation goals and battery degradation prevention. The processor uses temperature as an intermediate indicator to infer battery health status and adjusts discharge decisions accordingly, allowing revenue generation while preventing harmful degradation through temperature-based control
Data Source
AI summary
The present invention describes a method using temperature data to protect battery health during bidirectional charging in conjunction with monetization activities. The method includes receiving temperature data and determining anticipated energy needs of a building. The temperature data includes at least the temperature of one or more electric vehicle batteries or information required to determine the temperature of the one or more electric vehicle batteries while the anticipated energy needs are relative to ambient air temperature. The method includes determining an amount of discharge of the one or more electric vehicle batteries required to offset the anticipated needs of the building by a predetermined amount and determining based on the temperature data whether discharging the one or more electric vehicle batteries would be harmful to the health of the one or more electric vehicle batteries. The method includes discharging the one or more electric vehicle batteries to offset the anticipated needs of the building.