Power Supply Device Battery Power Estimation
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Solution Overview
Problem
Existing power supply devices struggle to accurately estimate standardized available battery output power under varying temperature and SOC conditions, leading to battery deterioration and inadequate power supply, especially in vehicles and large capacity power storage systems.
Innovation Solution
A power supply device equipped with a detection circuit to measure internal resistance, temperature, and SOC, and a memory circuit to store record data for estimating standardized available output power at standard conditions, allowing for accurate power estimation even when conditions deviate from standard temperature and SOC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If available output power is increased to meet high power demands, then power supply capability is improved, but battery deterioration accelerates
Solution Approach 1:
The patent implements dynamic control of charging and discharging operations based on real-time detection of battery temperature and SOC. The control unit adjusts operating parameters dynamically to keep the battery in a suitable state, enabling high power output when conditions permit while preventing deterioration under stressful conditions, thus resolving the contradiction between power supply capability and battery life
Solution Approach 2:
The system changes operating parameters (charging/discharging rates, voltage limits) based on detected battery state parameters (temperature, SOC). By adapting parameters to current battery conditions, the system can safely deliver high power when the battery is in an optimal state while reducing stress when temperature or SOC indicates vulnerability, thereby maintaining both power capability and reliability
2Measurement precision
If standardized available output power is estimated under actual temperature and SOC conditions, then estimation accuracy for current state is improved, but comparability with standard conditions deteriorates
Solution Approach 1:
The patent introduces temperature and SOC as intermediary parameters that mediate between actual battery conditions and standardized power estimation. The control unit detects these intermediary parameters and uses them to adjust the estimated standardized available output power, enabling accurate comparisons across different conditions while maintaining relevance to the actual battery state
Solution Approach 2:
The system changes the estimation approach by incorporating detected temperature and SOC values into the calculation of standardized available output power. This parameter adjustment allows the system to provide estimates that are both accurate for current conditions and comparable to standard benchmarks, resolving the contradiction between measurement precision and adaptability
Data Source
AI summary
A power supply device according to the present invention includes a detector, a memory, and a determinator. The detector detects internal resistance, temperature, and SOC of a battery. The memory stores record data and a predetermined SOC range as storage data. The record data is used for estimating standardized available power at standard SOC temperature corresponding to the detected internal resistance and temperature. If the detected SOC of the battery falls within the range, the determinator estimates standardized available power at the standard SOC and temperature based on the detected internal resistance and temperature, and the record data. When the internal resistance, temperature, and SOC are detected by the detector, if the detected SOC falls within the range, the determinator estimates standardized available power at standard SOC temperature based on the detected internal resistance and temperature, and the record data.