Battery Pack Parallel Connector with Segmented Electrode Tab
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs face issues with non-uniform current distribution and heat generation due to electrode tab connections, which affect safety and performance.
Innovation Solution
A battery pack design featuring electrode tabs with welding and connecting parts made of nickel, connected to bus bars made of copper, using screws for coupling, which improves heat management and current distribution by ensuring equal contact across battery cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrode tabs are used to connect battery cells in parallel, then the current increases in proportion to the number of battery cells, but the current is not uniformly distributed and heat is generated from the electrode tab
Solution Approach 1:
The electrode tab is segmented into multiple welding parts (first welding part, second welding part, etc.) that are distributed across different battery cells. This segmentation allows the current to be distributed through multiple separate connection points rather than concentrated at a single point, reducing heat generation at any one location while maintaining high total current capacity.
Solution Approach 2:
The electrode tab acts as an intermediary component between the battery cells and the external circuit. By designing the electrode tab with multiple welding parts and connecting parts, it mediates the current distribution evenly across all connected battery cells, preventing localized overheating while maintaining parallel connection benefits.
2Power
If electrode tabs are used to connect battery cells in parallel, then the current increases in proportion to the number of battery cells, but the current is not uniformly distributed to the battery cells
Solution Approach 1:
The electrode tab is designed with different local qualities - multiple welding parts with specific shapes and sizes are positioned at different locations to optimize current distribution. Each welding part can be tailored to match the specific electrical characteristics of the connected battery cell terminals, ensuring uniform current distribution across all cells.
3Quantity of substance
If multiple battery cells are connected in parallel to provide desired voltage and capacity, then the capacity increases, but heat generation deteriorates the safety of the battery pack
Solution Approach 1:
The electrode tab structure is segmented into multiple welding parts that connect to different battery cells in parallel. This segmentation enables increased capacity by connecting more cells while distributing the heat generation across multiple separate connection points, preventing localized overheating and improving safety.
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 enhances capacity retention, reduces heat generation, and maintains temperature balance among battery cells, leading to improved reliability and performance compared to conventional configurations.
Implementation Method 1
The welding parts may be welded to the electrode terminals of the battery cells.
Data Source
AI summary
Provided is a battery pack including a plurality of battery cells including at least one row of battery cells, an electrode tab connecting the plurality of battery cells to each other in parallel, and a bus bar coupled to the electrode tab, wherein the electrode tab includes a main plate extending parallel to the at least one row of battery cells, welding parts protruding from the main plate towards the battery cells, the welding parts being connected to electrode terminals of the battery cells, and connecting parts protruding opposite the welding parts, the connecting parts being connected to the bus bar.