Composite Battery Cell Layout With Internal Series-Parallel Isolation
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Solution Overview
Problem
Conventional battery systems face limitations in achieving high capacity and high voltage due to structural issues, leading to electrolyte decomposition, explosion risks, increased resistance, and decreased volumetric energy density from external connections.
Innovation Solution
A composite battery cell design that allows both series and parallel connections within the package, using independent electricity supply elements with a separator, active material layers, current collectors, and a sealing layer to prevent electrolyte circulation and electrochemical reactions, reducing internal resistance and enhancing charge transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If battery elements are internally connected in series to increase voltage, then voltage is improved, but electrolyte decomposition occurs causing battery failure or explosion
Solution Approach 1:
The battery cell is divided into multiple independent battery elements, each with its own sealed package containing electrolyte. This segmentation allows series connection of multiple elements to achieve high voltage while each element's electrolyte remains isolated and operates within safe voltage limits (5V), preventing electrolyte decomposition and safety issues.
Solution Approach 2:
A common current collector serves as an intermediary component that enables electrical connection between adjacent battery elements without requiring external wiring. The current collector is in direct contact with electrode tabs of multiple elements, facilitating series connection while maintaining compact internal structure and eliminating the need for external metal leads that会增加 resistance.
2Power
If external connections are used to connect battery cells in series or parallel, then capacity and voltage requirements are met, but resistance increases and performance decreases
Solution Approach 1:
Multiple battery elements are merged into a single integrated battery cell structure with internal series and parallel connections. The common current collector merges the electrical pathways of multiple elements, eliminating external connections and reducing overall resistance. This integration maintains high capacity and voltage while minimizing energy loss.
3Power
If external connections are used to form battery systems, then capacity and voltage are achieved, but volumetric energy density decreases due to space occupied by connections
Solution Approach 1:
Multiple battery elements are nested within a single battery cell package, with elements arranged in internal series and parallel configurations. This nesting eliminates the need for external connections and maximizes the use of internal space, significantly increasing volumetric energy density while achieving the required capacity and voltage.
4Quantity of substance
If battery elements are connected in parallel within the case, then capacity is improved, but external series connection is needed to achieve high voltage
Solution Approach 1:
The battery cell is segmented into multiple independent elements that can be configured in internal series and parallel arrangements. This segmentation allows flexible combination of elements to achieve both high capacity (through parallel connections) and high voltage (through series connections) within the same cell, eliminating the need for external connections and reducing structural complexity.
5Power
If battery elements are connected in series within the case, then voltage is improved, but external parallel connection is needed to achieve high capacity
Solution Approach 1:
The battery cell is segmented into multiple independent elements arranged in internal series and parallel configurations. This segmentation enables the cell to achieve both high voltage (through series connection of elements) and high capacity (through parallel connection of elements) within the same package, eliminating the need for external connections and simplifying the overall structure.
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 design achieves high voltage and capacity without electrolyte limitations, reduces internal resistance, improves safety and reliability, and increases volumetric energy density while simplifying heat dissipation and management.
Implementation Method 1
an electrolyte system impregnated within the active material layers
Implementation Method 2
a separator, two active material layers, two current collectors
Implementation Method 3
two current collectors disposed on outer sides of the active material layers
Data Source
AI summary
A composite battery cell includes a plurality of electricity supply elements connected to each other in series/parallel to form the electricity supply element groups. The electricity supply element groups are connected to each other in parallel/series and packed to form the battery cell with high capacity and high voltage. Each electricity supply element is an in-dependent module and the electrolyte system does not circulate therebetween. There only have charges transferred rather than electrochemical reactions between the adjacent electricity supply elements. Therefore, the electrolyte decomposition would not occur result from the high voltage caused by connecting in series. Both series and parallel connection are made within the package of the battery cell to achieve high capacity and high voltage.