Battery Module Fan Control for Uniform Temperature and Aging
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Solution Overview
Problem
Existing battery temperature control methods fail to consider the temperature differences and state of health (SOH) of multiple battery modules within a group, leading to non-uniform degradation and inefficient cooling.
Innovation Solution
A battery temperature control apparatus that adjusts cooling fan rotation speeds based on the temperature, state of charge (SOC), and state of health (SOH) of multiple battery modules, using a master management unit to coordinate cooling for each module within a battery group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cooling control is performed based solely on the temperature of the corresponding battery module, then the cooling control is simple, but the temperature difference between battery modules cannot be reduced and non-uniform degradation occurs
Solution Approach 1:
The patent applies local quality by differentiating cooling control strategies for different battery modules based on their individual characteristics. Each battery module receives customized cooling control parameters (such as different cooling medium flow rates or fan speeds) determined by its temperature, state of charge, and state of health, rather than applying uniform cooling across all modules. This localized approach reduces temperature differences and prevents non-uniform degradation.
Solution Approach 2:
The patent implements dynamic cooling control where cooling parameters are continuously adjusted based on real-time monitoring of battery module conditions. The cooling control system dynamically modifies cooling medium supply rates, fan speeds, or coolant flow distribution according to changing temperature, SOC, and SOH values, enabling adaptive response to varying thermal conditions and preventing uniform degradation patterns.
2Ease of operation
If individual cooling is performed for each battery module based on temperature only, then the control is straightforward, but state of health differences and temperature differences among modules are not addressed
Solution Approach 1:
The patent extends cooling control from single-parameter (temperature-only) to multi-parameter control by incorporating state of charge and state of health as additional control variables. The cooling control system calculates comprehensive cooling requirements by evaluating multiple parameters simultaneously, adjusting cooling intensity based on the combined influence of temperature, SOC, and SOH. This multi-parameter approach maintains operational simplicity while significantly improving module uniformity and reliability.
3Use of energy by moving object
If cooling medium is supplied based on individual module temperature, then energy consumption is reduced, but temperature differences between modules persist
Solution Approach 1:
The patent implements a feedback-based cooling control system that continuously monitors temperature, SOC, and SOH of all battery modules and adjusts cooling medium distribution accordingly. The system uses feedback from multiple sensors to dynamically optimize cooling medium flow rates to each module, ensuring that cooling energy is allocated efficiently while simultaneously reducing temperature differences across the battery pack. The feedback loop enables real-time adjustments that balance energy consumption with temperature uniformity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces temperature and life differences among battery modules, ensuring uniform degradation and efficient cooling by considering the state of multiple modules.
Implementation Method 1
a first cooling fan to the first battery module
Implementation Method 2
supplying a cooling medium to the battery module
Data Source
AI summary
Provided are a battery temperature control apparatus, a battery temperature control method and a battery system. The battery temperature control apparatus includes first to nth cooling fans provided in a one-to-one relationship to first to nth battery modules connected in series, first to nth slave management units provided to the first to nth battery modules in a one-to-one relationship, and a master management unit. n is a natural number of 2 or greater. The master management unit determines battery temperature information including first to nth temperature values and a first reference value. The first to nth temperature values indicate temperatures of the first to nth battery modules. The first reference value is an average or a median of the first to nth temperature values. The master management unit controls a rotation speed of each cooling fan based on the battery temperature information.