Storage Battery Control System with Insulated Power Supply
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Solution Overview
Problem
Variation in state of charge (SOC) between battery modules coupled in series restricts charging and discharging, as conventional methods consume battery module power using external resistors, leading to inefficient power utilization and imbalance.
Innovation Solution
A storage-battery control system with a controller and insulating communication unit that supplies power from a low voltage power supply to battery modules, reducing internal power consumption and maintaining SOC balance without external resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional cell balance controlling method using external resistors is used to straighten SOCs in battery modules, then SOC uniformity is improved, but electric power is consumed from the battery modules leading to reduced power utilization efficiency
Solution Approach 1:
The patent merges the cell balance control function with the power supply system by integrating resistors and switching elements into the power supply circuitry. This allows the power supply unit to directly control current distribution to individual battery modules, eliminating the need for separate external resistor-based balance control systems and reducing overall power consumption.
Solution Approach 2:
The patent introduces a controller as an intermediary that manages both power distribution and cell balance control. The controller monitors SOC levels of individual battery modules and dynamically adjusts power supply parameters to maintain SOC uniformity while optimizing power utilization efficiency, acting as a mediator between the power supply and battery modules.
2Stability of the object's composition
If battery modules with maximum SOC are restricted from charging to maintain SOC balance, then SOC uniformity is maintained, but charging efficiency is reduced
Solution Approach 1:
The patent implements dynamic control of power supply parameters based on real-time SOC monitoring. The controller continuously adjusts charging current and voltage parameters for each battery module according to its current SOC level, enabling adaptive charge management that maintains SOC uniformity while maximizing overall charging efficiency without rigid restrictions.
Solution Approach 2:
The patent changes operating parameters (current, voltage, power) of the power supply unit dynamically based on the SOC state of individual battery modules. By adjusting these parameters in real-time, the system can charge battery modules with lower SOC at higher rates while limiting current to modules with higher SOC, thereby maintaining uniformity without sacrificing overall charging efficiency.
3Stability of the object's composition
If battery modules with minimum SOC are restricted from discharging to maintain SOC balance, then SOC uniformity is maintained, but discharging efficiency is reduced
Solution Approach 1:
The patent implements dynamic control of power supply parameters based on real-time SOC monitoring. The controller continuously adjusts charging current and voltage parameters for each battery module according to its current SOC level, enabling adaptive charge management that maintains SOC uniformity while maximizing overall charging efficiency without rigid restrictions.
Solution Approach 2:
The patent changes operating parameters (current, voltage, power) of the power supply unit dynamically based on the SOC state of individual battery modules. By adjusting these parameters in real-time, the system can charge battery modules with lower SOC at higher rates while limiting current to modules with higher SOC, thereby maintaining uniformity without sacrificing overall charging efficiency.
Data Source
AI summary
In a storage-battery control system, an insulating communication unit couples a controller to a battery module constituting a storage battery unit that outputs a predetermined high voltage value. A power supply line is further provided for supplying electric power output from a controller DC/DC, i.e., a controller-side voltage converter for the controller, to the battery module, so that electric power is collectively supplied via the power supply line to a module CPU and a module-side insulating circuit both consuming electric power in the battery module. A secondary battery in the battery module supplies electric power to only a cell-voltage detector.