Battery Tab-Terminal Connection Layout for Heat and Disconnection Control
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Solution Overview
Problem
Existing secondary batteries face challenges in efficiently and reliably connecting electrode tabs to terminals, which can lead to disconnection and reduced heat dissipation, particularly in high-power applications.
Innovation Solution
The implementation of multiple groups of connection members, each with separate or common welded portions, and the use of insulators as spacers to enhance electrical connectivity and prevent contact between groups, improving heat dissipation and reducing disconnection risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single connection member is used to connect the electrode tab to the terminal, then the device complexity is reduced, but the reliability of electrical connection deteriorates due to increased disconnection risk and poor heat dissipation
Solution Approach 1:
The connection member is divided into multiple groups (first connection members and second connection members) that are spatially separated and functionally independent. Each group connects to different electrode tabs (first electrode tab and second electrode tab respectively), distributing the electrical connection load and reducing disconnection risk. This segmentation transforms a single-point failure system into a multi-point redundant system.
Solution Approach 2:
An insulator is introduced as an intermediary component between the first and second groups of connection members. This insulator prevents unwanted electrical contact between the groups while maintaining their spatial separation, enabling the system to achieve both connectivity and isolation requirements simultaneously.
2Reliability
If multiple groups of connection members are used to improve heat dissipation and reduce disconnection risk, then the reliability improves, but the device complexity increases
Solution Approach 1:
The connection members are segmented into multiple groups with distinct functions - first connection members connect to the first electrode tab while second connection members connect to the second electrode tab. This segmentation allows independent optimization of each connection path and improves overall system reliability through redundancy.
Solution Approach 2:
The connection members are arranged in different spatial dimensions and orientations, with first and second groups positioned at different locations and angles. This spatial distribution enhances heat dissipation by increasing surface area exposure and prevents thermal concentration, while also reducing mechanical stress on any single connection point.
3Volume of stationary object
If connection members are placed close together to reduce space usage, then the device volume is reduced, but the heat dissipation performance deteriorates
Solution Approach 1:
Connection members are arranged in three-dimensional space with vertical and horizontal separation. The insulator provides vertical spacing while the overall structure utilizes horizontal space efficiently. This multi-dimensional arrangement maximizes heat dissipation surface area while minimizing the footprint of the battery assembly.
Solution Approach 2:
By dividing connection members into separate groups with insulators between them, the system creates thermal zones that prevent heat accumulation. Each group can dissipate heat independently, and the insulators act as thermal barriers that prevent heat transfer between groups, improving overall thermal management in a compact volume.
4Reliability
If insulators are added as spacers between connection member groups, then the electrical isolation and reliability improve, but the device complexity increases
Solution Approach 1:
The insulator serves as a mediator component that simultaneously achieves multiple functions: electrical isolation between connection member groups, mechanical spacing to maintain geometric relationships, and thermal barrier to prevent heat transfer. This single component addresses multiple requirements that would otherwise need separate solutions.
Solution Approach 2:
The insulator is designed as a multi-functional component that combines electrical insulation, mechanical spacing, and thermal management functions. By integrating these functions into a single component, the system avoids the need for separate insulators, spacers, and thermal barriers, thereby reducing overall complexity despite adding functional capability.
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
Enhances electrical connectivity and heat dissipation performance, ensuring stable operation and reducing the likelihood of disconnection in secondary batteries, particularly in high-power applications.
Implementation Method 1
a plurality of connection members that electrically connect the electrode tab to the terminal
Implementation Method 2
each with separate or common welded portions
Data Source
AI summary
A secondary battery includes a can with an opening, an electrode assembly accommodated in the can, the electrode assembly including an electrode tab, a terminal electrically connected to the electrode tab of the electrode assembly, the terminal being positioned outside the can, and a plurality of connection members electrically connecting the electrode tab to the terminal, the plurality of connection members including two or more groups.