Battery Temperature Distribution Management
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Solution Overview
Problem
Existing information handling systems face challenges in managing battery temperature distribution, leading to accelerated battery wear and unpredictable performance due to large temperature variations across battery cells and the system, which affects battery cycle life and capacity retention.
Innovation Solution
A system that includes multiple temperature sensors to calculate a battery temperature distribution value by determining differences between maximum and minimum temperature readings, and using this value to set battery control parameters such as operating modes, charge/discharge rates, and voltage/current controls, to manage battery operations effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple temperature sensors are used to measure battery temperature distribution, then temperature measurement precision is improved, but device complexity increases
Solution Approach 1:
The battery management system divides the temperature measurement function into multiple segments by deploying several temperature sensors at different locations within the battery pack. Each sensor independently measures temperature at its specific location, enabling comprehensive temperature distribution mapping across the battery rather than relying on a single measurement point.
Solution Approach 2:
The system transitions from single-point temperature measurement to multi-dimensional temperature distribution measurement by adding spatial dimensions. Multiple sensors are positioned at different coordinates within the battery pack to capture temperature variations across length, width, and depth, creating a three-dimensional temperature map that reveals thermal gradients and hot spots.
2Reliability
If battery control parameters are adjusted based on temperature distribution, then battery reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The battery management system implements continuous feedback by constantly monitoring temperature distribution through multiple sensors and automatically adjusting control parameters such as charge current, discharge current, and cooling system operation. This closed-loop control ensures the battery operates within safe thermal boundaries without requiring manual intervention, thereby improving reliability while maintaining ease of operation through automation.
Solution Approach 2:
The system dynamically adjusts battery control parameters based on real-time temperature distribution conditions. Charge and discharge rates are modulated according to thermal states, cooling systems are activated when hot spots are detected, and operational limits are adaptively changed to prevent thermal runaway. This dynamic response optimizes both reliability and operational efficiency.
Data Source
AI summary
An information handling system may include a main processor, a battery, multiple temperature sensors for obtaining temperature values associated with the battery, a processor, and memory media accessible to the processor. The memory media may store instructions executable by the processor for receiving a respective temperature value from each of the temperature sensors and calculating a battery temperature distribution value dependent on the received temperature values, including determining a difference between two temperature values. The instructions may be further executable for determining a respective value for each of one or more battery control parameters dependent on the battery temperature distribution value, and setting each of the battery control parameters to the determined value. Determining the control parameters values may be further dependent on the rate of change of the difference between the two temperature values, or on whether the received temperatures or the temperature difference lie outside a predetermined range.