Stacked Battery Electrode Layout for Thinner High-Density Cells
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Solution Overview
Problem
Existing stacked batteries are thick and have room for energy density optimization due to their structural design, which limits their performance in terms of thickness and energy storage capacity.
Innovation Solution
A battery design featuring a conductive housing with an insulation layer, a pole that penetrates through the insulation, and a cell unit with stacked electrode plates and separators, where each electrode plate has active layers on one side and uncoated regions for output ends, connected via conductive layers, reducing the need for thick conductive metal strips and allowing for a thinner, higher energy density configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thick conductive metal strips are used to connect electrode plates, then good electrical connection is achieved, but battery thickness increases and energy density decreases
Solution Approach 1:
The patent merges the connection function of multiple electrode plates with the housing structure by integrating conductive adhesive layers directly onto the housing inner wall. This eliminates the need for separate thick conductive metal strips, achieving both good electrical connection and reduced battery thickness.
Solution Approach 2:
The patent extracts the connection function from traditional thick metal strips and relocates it to thin conductive adhesive layers applied on the housing. This extraction allows the battery to maintain electrical connectivity while significantly reducing the thickness contribution from connection components.
2Reliability
If multiple electrode plates are stacked with tabs extending to form connection ends, then electrical connection between plates is achieved, but battery thickness increases
Solution Approach 1:
The patent merges the tab extension and connection functions into a unified conductive adhesive layer system. The conductive adhesive layers on the housing inner wall directly connect multiple electrode plates without requiring tabs to extend outward, thereby maintaining electrical connectivity while reducing battery thickness.
Solution Approach 2:
The patent transitions from a three-dimensional tab extension structure to a two-dimensional conductive adhesive layer configuration on the housing surface. This dimensional change eliminates the thickness penalty associated with protruding tabs while maintaining effective electrical connection between electrode plates.
3Stability of the object's composition
If conductive metal strips are used to wrap and connect electrode plates, then structural stability is achieved, but battery thickness increases and energy density optimization is limited
Solution Approach 1:
The patent merges the structural support function and electrical connection function into the housing and conductive adhesive layer system. The housing provides structural stability while the thin conductive adhesive layers provide electrical connection, eliminating the need for thick conductive metal strips and achieving both structural integrity and thickness reduction.
Solution Approach 2:
The patent employs thin conductive adhesive layers instead of thick rigid metal strips. These thin films provide both structural support and electrical connection functions, significantly reducing battery thickness while maintaining the necessary structural stability and connectivity.
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 battery achieves a smaller thickness and higher energy density by eliminating the need for thick conductive metal strips and optimizing the connection of electrode plates, resulting in improved performance and reduced volume.
Implementation Method 1
The first electrode output end is electrically connected to one of the pole or the housing through the first conduction layer
Implementation Method 2
The pole penetrates through the insulation layer and the housing, and is insulated from the housing through the insulation layer
Data Source
AI summary
A battery includes a conductive housing, an insulation layer, a pole, and a cell unit. The insulation layer is disposed in the housing, the pole penetrates through the insulation layer and is insulated from the housing. The electrode plates include a first and a second electrode plates. The first electrode plate includes a first current collector with a first active layer being disposed on one side of it facing the separator, an uncoated region on the other side is to form a first electrode output, which is electrically connected to the pole or the housing. The second electrode plate includes a second current collector, where a second active layer is disposed on at least one side of the second current collector, the second current collector forms a second electrode output end, which is electrically connected to the other one of the housing or the pole.