Full-Width Electrode Pouch Cell Architecture for Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High power density batteries face challenges in managing heat generated during high current charging and discharging, leading to localized heat buildup, reduced performance, and shorter lifetimes due to the stacked electrode configuration in pouch cell batteries.
Innovation Solution
The implementation of full-width electrodes at opposite ends of the pouch cell battery, with cathode and anode connection portions extending across the width of the electrode bases, allows for more uniform current flow and heat distribution, reducing heat concentration and enabling better thermal management through separate bus bars acting as heat sinks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If stacked electrode configuration is used in pouch cell batteries, then energy density within given space is improved, but localized heat buildup occurs reducing performance and battery lifetime
Solution Approach 1:
The electrode configuration is segmented into full-width electrodes that extend across the entire width of the pouch cell, with connection portions at opposite ends. This segmentation allows heat to be distributed and dissipated at multiple locations rather than concentrating in a single area, resolving the contradiction between maintaining high energy density through stacking and preventing localized heat buildup.
Solution Approach 2:
Different regions of the electrode structure are assigned different functions: the active electrode material regions provide high energy density, while the connection portions at opposite ends serve as heat dissipation zones and current collection points. This local differentiation allows the system to achieve both high energy density and effective thermal management.
2Power
If high current charging and discharging is implemented, then power density is improved, but heat management becomes increasingly challenging
Solution Approach 1:
The electrode design transitions from traditional localized connections to full-width electrodes extending across the entire width of the cell, with connection portions at both ends. This dimensional expansion creates additional heat dissipation pathways and current distribution channels, enabling high power density while managing heat effectively through the extended surface area.
3Temperature
If full width electrodes are used at opposite ends of the pouch cell battery, then current and heat distribution is improved, but device complexity increases
Solution Approach 1:
The full-width electrodes serve multiple functions simultaneously: they provide current collection, heat dissipation, and structural support. By making the electrodes extend across the full width with connection portions at both ends, the same structural element performs multiple critical functions, improving heat distribution without proportionally increasing device complexity.
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 configuration enhances thermal efficiency, reduces heat buildup, and extends battery performance and lifespan by ensuring more uniform heat distribution and efficient cooling.
Implementation Method 1
enabling better thermal management through separate bus bars acting as heat sinks
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
A battery including a separator film (202), a plurality of cathodes (102), each having a cathode base (104), a first end of each cathode base (104) having a cathode connection portion (106) extending contiguously across the width of the cathode base (104) and free of a cathode material (108), the battery including a plurality of anodes (112), each having an anode base (114), a first end of each anode base (114) having an anode connection portion (116) extending contiguously across the width of the anode base (114) and free of an anode material (118), and the anode connection portion. The cathodes (102) and anodes (112) are in an electrode stack with alternating anodes (112) and cathodes (102) and each separated by a portion of the separator film (202). Each cathode connection portion (106) of each cathode (102) connected to a bus bar (404) at a first end of the battery, and each anode connection portion (116) electrically connected to a bus bar (404) disposed at a second end of the battery.