Battery Cell Package Anode Plate Thermal Dissipation
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Solution Overview
Problem
Existing energy storage devices, such as batteries, face challenges with poor thermal conductivity, leading to inefficient heat removal and increased weight and volume due to the need for additional thermally conducting structures, which limits their energy density and performance in compact battery modules and packs.
Innovation Solution
The design incorporates a battery cell architecture with a plurality of dies, each having anode and cathode current collectors with extending fingers, and electrically and thermally conductive package plates that form part of the enclosure, providing a direct high thermal conductivity path for heat dissipation without additional structures, allowing for improved thermal performance and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional battery pack designs are used with separate thermal management structures, then heat removal capability is provided, but weight and volume increase significantly
Solution Approach 1:
The patent merges the thermal management function with the battery cell structure itself by making the current collectors thermally conductive. The current collectors serve dual purposes: electrical conduction and heat removal, eliminating the need for separate thermal management structures and reducing overall pack weight.
Solution Approach 2:
The current collectors are designed to perform multiple functions simultaneously: electrical conduction, structural support, and thermal conduction. This multi-functionality reduces the number of separate components needed, thereby reducing weight while maintaining heat removal capability.
2Temperature
If traditional battery pack designs with separate thermal management structures are used, then heat removal is achieved, but pack volume increases
Solution Approach 1:
The thermal management function is merged into the battery cell structure through thermally conductive current collectors. This integration eliminates the need for separate thermal management components, thereby reducing pack volume while maintaining effective heat removal capability.
3Temperature
If more thermally conducting structures are added to improve heat removal, then thermal performance improves, but energy density decreases
Solution Approach 1:
The current collectors are designed to perform multiple functions simultaneously: electrical conduction, structural support, and thermal conduction. This multi-functionality reduces the need for additional thermal management components, thereby maintaining energy density while improving thermal performance.
4Ease of manufacture
If conventional jelly roll or prismatic cell designs are used, then manufacturing simplicity is maintained, but thermal conductivity from cell center is poor
Solution Approach 1:
The patent changes the thermal conductivity parameter of the current collectors by selecting materials with high thermal conductivity (such as aluminum or copper with thermal conductivity of 100-400 W/m-K). This parameter change enables effective heat removal from the cell center while maintaining the simplicity of conventional cell designs.
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 solution enhances thermal performance, reduces weight and volume, and increases pack energy density, enabling more efficient heat dissipation and simplified module designs, particularly beneficial for high-capacity applications like electric vehicles, while maintaining or exceeding energy density targets.
Implementation Method 1
the battery cell package anode plate is electrically and thermally conductive and forms part of an enclosure that retains the electrolyte; and a battery cell package cathode plate in contact with the die cathode current collector of each of the plurality of dies, wherein the battery cell package cathode plate is electrically and thermally conductive
Data Source
AI summary
Certain embodiments of the invention relate to the design of three-dimensional battery cells and their incorporation into battery modules and battery packs. The present invention may be particularly advantageous when incorporated into large battery packs, for example, those used in electric vehicles. The unique architecture of the battery cells of certain embodiments of the invention provides improved thermal performance with significant impact on cycle and calendar life when incorporated into a battery pack. Substantially higher pack energy density for a given cell energy density is provided when compared to a conventional cell. Battery cells can be strung together to form modules and packs with whatever series/parallel arrangement required for a particular application. Cooling, if needed, can be incorporated at the module level rather than the individual die level, as is the case with conventional architectures, dramatically reducing the cost of the system.