Battery Cell Lead Tab Layout for Lower-Heat Electrical Connections
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Solution Overview
Problem
Existing battery devices lack efficient electrical connections and management systems, leading to increased component count and heat generation, which affects performance and efficiency.
Innovation Solution
A battery device with lead tabs formed integrally with electrode tabs, allowing adjacent tabs to be connected in a way that reduces the number of sub-boards and components, and optimizing tab placement to minimize heat generation and enhance contact area, with a battery management system that monitors voltage and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate lead tabs and sub-boards are used for each battery cell connection, then electrical connections can be established, but the number of components increases and device complexity increases
Solution Approach 1:
The patent merges the lead tab and electrode tab into a single integral structure. The lead tab is formed as one piece with the electrode tab, eliminating the need for separate connection components and sub-boards for each battery cell, thereby reducing overall device complexity while maintaining reliable electrical connections.
Solution Approach 2:
The integral lead tab-electrode tab structure serves multiple functions simultaneously: it acts as both the electrical conductor (lead tab) and the electrode connector (electrode tab), while also providing structural support for cell stacking. This multi-functionality reduces the number of separate components needed in the battery device.
2Reliability
If multiple separate components are used for tab connections, then electrical connections can be established, but heat generation increases
Solution Approach 1:
By combining the lead tab and electrode tab into a single integral structure, the patent eliminates multiple connection interfaces between separate components. This reduces the number of potential heat generation points at connection interfaces, as there are fewer joints and contact points where electrical resistance and heat buildup occur.
3Ease of manufacture
If traditional separate tab structures are used, then manufacturing can proceed, but contact area between tabs is limited
Solution Approach 1:
The integral structure of the lead tab and electrode tab creates a larger continuous contact area compared to separate components. The tabs are formed as one piece with extended contact surfaces, increasing the area over which electrical current is distributed and reducing current density at specific points.
Data Source
AI summary
A battery device includes a lead tab electrically connected to a positive electrode tab provided for a first battery cell among a plurality of battery cells and a negative electrode tab provided for a second battery cell adjacent to the first battery cell among the plurality of battery cells, and a lead tab electrically connected to a positive electrode tab provided for a third battery cell among the plurality of battery cells and a negative electrode tab provided for a fourth battery cell adjacent to the third battery cell among the plurality of battery cells, wherein the lead tabs are adjacent to each other in the Y direction.