Battery Control Device Dynamic Power Adjustment
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Solution Overview
Problem
Existing battery control systems fail to accurately calculate and manage maximum allowable charge and discharge power in dynamic operating conditions, leading to potential overvoltage or overdischarge, which can cause battery deterioration.
Innovation Solution
The system continuously monitors and adjusts the maximum allowable charge and discharge power based on actual usage time, reducing the power values communicated to the vehicle controller to prevent excessive load and minimize battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the maximum allowable charge power and discharge power are calculated using the internal resistance table based on duration time, then the power values are accurate for stationary states, but the values become inappropriate when charging/discharging is continuously performed, leading to potential overvoltage or overdischarge
Solution Approach 1:
The patent transitions from a static power management approach (using fixed internal resistance tables) to a dynamic approach by continuously monitoring the actual charging/discharging current and duration. The control device dynamically adjusts the maximum allowable power values based on real-time operating conditions, ensuring both accuracy and safety in varying states of battery operation.
Solution Approach 2:
The control device implements a feedback mechanism by continuously monitoring the actual charging/discharging current and comparing it against the maximum allowable values. When the actual current approaches or exceeds the calculated limits, the system adjusts the allowable power values in real-time, creating a closed-loop control system that adapts to changing battery conditions and prevents overvoltage or overdischarge.
2Power
If the maximum allowable power values are maintained at high levels, then the battery can deliver high power output, but the battery may be overloaded and deteriorate faster
Solution Approach 1:
The patent dynamically changes the power parameters (maximum allowable charge power and discharge power) based on multiple factors including temperature, state of charge (SOC), and actual charging/discharging duration. By adjusting these parameters in real-time according to battery conditions, the system optimizes the balance between delivering high power when needed and protecting the battery from overload that would accelerate deterioration.
3Duration of action of stationary object
If the maximum allowable power is reduced to protect battery life, then battery deterioration is suppressed, but the power output capability is limited
Solution Approach 1:
The system dynamically adjusts power limits based on actual operating conditions rather than using fixed conservative limits. By monitoring temperature, SOC, and charging/discharging duration in real-time, the control device can temporarily allow higher power output when conditions permit (extending power capability) while maintaining protective limits when the battery is vulnerable (preserving battery life).
Data Source
AI summary
An object of the present invention is to provide a control device and a control method for a storage battery, which calculates an appropriate maximum allowable input/output power that suppresses deterioration of the storage battery while suppressing deterioration of power performance of a vehicle when a current is continuously charged or discharged.When it is detected that charging or discharging is continuously performed over a predetermined duration time with respect to the maximum allowable charge power and the maximum allowable discharge power which can be input and output during the calculated predetermined duration time, the value of the maximum allowable charge power or the maximum allowable discharge power communicated to a vehicle controller on the basis of the state of charge or discharge is reduced based on the time during which charging or discharging is actually continued.