Battery Pack Stability Control for Idle Stop Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs used in Idle Stop & Go (ISG) systems face challenges in maintaining stability during frequent start-up operations, leading to reduced durability and inefficient fuel usage due to inadequate charge and discharge characteristics.
Innovation Solution
A battery pack with a battery management unit that monitors conditions such as temperature, swelling, and gas presence, generating a control signal to prevent ISG mode start-up or termination if stability requirements are not met, and includes a recovery process to restore normal conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery is used for frequent start-up operations in ISG mode, then the power output and charge-discharge characteristics are improved, but the battery durability and stability deteriorate
Solution Approach 1:
The battery management unit performs preliminary monitoring of battery conditions (temperature, voltage, current, swelling degree) before allowing ISG mode operation. When instability is detected, the system proactively generates control signals to prohibit ISG mode start-up or terminate ongoing ISG mode, preventing damage before it occurs. This preliminary detection and prevention mechanism resolves the contradiction by enabling frequent start-ups only when battery conditions are stable.
Solution Approach 2:
The system continuously monitors battery conditions and uses this feedback to dynamically control ISG mode operation. The battery management unit receives real-time data on temperature, voltage, current, and swelling degree, then adjusts ISG mode availability accordingly. This closed-loop feedback mechanism ensures that high power output is maintained only when battery stability conditions are satisfied, resolving the contradiction between power performance and reliability.
2Reliability
If the battery management unit continuously monitors battery conditions and generates control signals, then the battery stability and safety are improved, but the device complexity increases
Solution Approach 1:
The battery management unit is designed to perform multiple functions: monitoring temperature, voltage, current, swelling degree, generating control signals for ISG mode prohibition/termination, and blocking power supply to the starter motor. By consolidating these diverse functions into a single multi-functional control unit, the system achieves high battery stability without proportionally increasing overall device complexity. The universal design allows one component to handle multiple monitoring and control tasks.
Solution Approach 2:
The battery management unit autonomously monitors battery conditions and makes independent decisions about ISG mode control and power supply blocking without requiring external intervention. The system self-regulates based on pre-programmed stability criteria, automatically generating control signals when conditions are not met. This self-service capability reduces the need for additional complex control logic and external management systems.
Data Source
AI summary
A battery pack includes a battery for supplying power to a starter motor of a vehicle, and a battery management unit for monitoring a condition of the battery, and for blocking the supply of power from the battery to the starter motor when a stability condition requirement for the battery is not satisfied.