LFP Battery Pack Module Layout for Space and Thermal Balance
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Solution Overview
Problem
Existing battery packs for electric vehicles face challenges in optimizing energy density, capacity, and mass distribution due to limited space, and require improved thermal management and integration efficiency.
Innovation Solution
A battery pack configuration with two sets of battery modules, where one set includes more lithium iron phosphate (LFP) cells than the other, along with a battery voltage temperature monitor, high/low voltage interfaces, thermal components, and a voltage distribution box, to enhance energy density, capacity, and mass distribution while ensuring efficient thermal control and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If battery modules of different sizes are used to optimize energy density and capacity distribution, then energy density and capacity are improved, but device complexity increases due to multiple module configurations
Solution Approach 1:
The battery pack is divided into multiple battery modules with different numbers of cells (e.g., first battery module with 12 cells, second battery module with 16 cells). This segmentation allows optimization of energy density and capacity distribution while managing complexity through standardized module designs that can be systematically combined.
2Quantity of substance
If more battery cells are added to increase capacity, then energy storage capacity is improved, but thermal management difficulty increases due to larger heat generation
Solution Approach 1:
The battery pack with higher capacity (e.g., 16-cell modules) is segmented into smaller modular units, each with its own thermal management capabilities. This allows heat dissipation to be managed at the module level rather than requiring a single large thermal management system for the entire high-capacity pack.
Solution Approach 2:
Multiple battery modules are combined within a shared thermal management system that includes coolant channels and thermal components. The thermal management system is designed to handle the cumulative heat load of multiple modules while maintaining efficient heat dissipation through coordinated fluid flow and thermal coupling.
3Volume of moving object
If battery modules are arranged to maximize space utilization, then volume efficiency is improved, but manufacturing complexity increases due to precise positioning requirements
Solution Approach 1:
The battery pack is segmented into standardized modules that can be systematically arranged in different configurations (e.g., different numbers and arrangements of battery modules). This segmentation enables flexible space utilization while simplifying manufacturing through repeatable module assembly procedures rather than custom positioning of individual cells.
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
The configuration improves energy density, capacity, and mass distribution within the limited space of electric vehicles, enhances thermal management, and integrates components efficiently, providing improved performance and reliability for electric vehicle battery packs.
Implementation Method 1
Thermal components can laterally span underneath the battery modules and the thermal insulation
Implementation Method 2
thermal insulation between the pack cover and the battery modules
Data Source
AI summary
A system can include a first battery module. The system can include a second battery module. The second battery module can have more lithium iron phosphate (LFP) battery cells than the first battery module.