Battery Pack Management Apparatus for State of Health Prediction
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Solution Overview
Problem
Conventional battery management systems fail to provide accurate state information for vehicle battery packs operating under severe temperature and current conditions, leading to unpredictable battery life and performance deterioration, making it difficult to determine suitable times for repair or replacement, which can result in vehicle malfunctions and potential accidents.
Innovation Solution
A battery pack management apparatus comprising a temperature measurement module, current measurement module, time measurement module, and control module that measures and stores data on temperature and current conditions, providing state information to users to predict and prevent battery deterioration, including a method for accumulating and storing time data to determine the State Of Health (SOH) of the battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional battery management systems are used, then the system is simple and easy to manufacture, but the system cannot accurately detect severe temperature or high current conditions, leading to loss of information about battery state
Solution Approach 1:
The patent implements a hierarchical management structure where a battery pack management apparatus is nested within the vehicle's power management control system. The management apparatus contains multiple measurement modules (temperature, current, voltage) and a control unit that processes data locally, which then feeds into the overall vehicle power management system. This nested architecture allows detailed battery state information to be captured at the pack level while integrating with the broader vehicle control system.
Solution Approach 2:
The patent introduces a dedicated battery pack management apparatus as an intermediary between the battery pack and the vehicle's power management control. This intermediary device specifically handles the complex task of monitoring severe operating conditions (temperature, current, voltage) and translating them into meaningful state information, thereby preventing information loss without requiring the entire vehicle control system to become overly complex.
2Power
If high current flows in the battery under severe temperature conditions, then the battery can provide high driving force to the vehicle, but the battery life and performance are deteriorated
Solution Approach 1:
The patent implements preliminary monitoring of temperature, current, and voltage conditions to detect severe operating states before they cause irreversible battery damage. The control unit continuously measures these parameters and can identify when the battery is entering a severe condition state, allowing for preventive actions such as warning the driver or limiting current output before the battery life is permanently compromised.
Solution Approach 2:
The patent establishes a feedback mechanism where the battery pack management apparatus continuously monitors operating conditions and provides state information back to the power management control and ultimately to the driver. This feedback loop enables real-time awareness of battery health status, allowing the system to adjust operation to prevent severe conditions from causing permanent damage while still permitting high power output when conditions are favorable.
3Adaptability or versatility
If the battery operates in ultimately severe operation conditions, then the vehicle can function in extreme environments, but the battery life is shortened and performance is weakened
Solution Approach 1:
The patent uses preliminary detection of severe operating conditions through temperature, current, and voltage measurement modules. By identifying extreme environments before they cause damage, the system can inform drivers through state information displays, allowing them to take preventive actions such as avoiding extreme conditions or seeking maintenance, thereby extending battery life while maintaining operational flexibility.
Solution Approach 2:
The battery pack management apparatus performs self-monitoring and self-diagnosis by continuously measuring its own operating parameters (temperature, current, voltage) and determining its own state. This self-service capability allows the battery system to track its own health and provide accurate state information without requiring external monitoring equipment, enabling better management of extreme operating conditions.
4Adaptability or versatility
If the battery is used in severely cold or hot temperatures, then the vehicle can operate in various climates, but the battery performance is weakened
Solution Approach 1:
The patent implements preliminary temperature monitoring through dedicated temperature measurement modules that detect extreme cold or hot conditions before they significantly impact battery performance. The control unit processes this temperature data along with current and voltage information to determine battery state, providing early warning to drivers about performance degradation risks in extreme temperatures, allowing for preventive maintenance or operational adjustments.
Data Source
AI summary
An apparatus for managing a battery pack for a vehicle includes a temperature measurement module for measuring temperature of the battery pack; a current measurement module for measuring a charge/discharge current of the battery pack when the measured temperature is not within a predetermined temperature range; a time measurement module for measuring the time while the measured charge/discharge current is over a predetermined current value; a storage module for accumulating and storing the measured time; and a control module for determining a state of the battery pack according to the accumulated and stored time and providing the state information to a user.