Secondary Battery Tab Welding Heat Dissipation
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Solution Overview
Problem
High-capacity secondary batteries generate heat during charging and discharging, which can significantly affect the performance of energy storage systems, particularly at welding spots between electrode tabs and leads, necessitating a solution to minimize this heat influence.
Innovation Solution
A secondary battery design where the welding part connecting the electrode tab to the electrode lead is formed near the cell assembly, along the lengthwise direction of the electrode lead, within a specific area closer to the cell assembly, using methods like resistance welding, ultrasonic welding, or conductive adhesives, to reduce heat generation and its impact on battery performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-capacity secondary batteries are used to build energy storage systems, then charging capacity and output increase, but heat generation during charging and discharging increases, significantly affecting system performance
Solution Approach 1:
The welding part is extracted from the conventional location (inside or far from the cell assembly) and repositioned to be formed near the cell assembly along the lengthwise direction of the electrode lead. This extraction and repositioning allows the welding operation to occur in a location where heat can be more effectively managed and dissipated, reducing the thermal impact on the battery cells while maintaining the high charging capacity required for energy storage systems
2Reliability
If the welding part is formed far from the cell assembly, then electrical connection is achieved, but heat generated at the welding spot has greater influence on battery performance
Solution Approach 1:
The electrode lead acts as an intermediary element that connects the cell assembly to the external circuit. By forming the welding part near the cell assembly along the lengthwise direction of the electrode lead, the design utilizes the lead itself as a thermal management pathway, conducting heat away from the welding spot and reducing its harmful influence on battery performance while maintaining reliable electrical connection
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
This design minimizes the influence of heat generated at the welding spot, maintaining battery performance close to ideal conditions, even in high-capacity configurations, by optimizing heat distribution and reducing thermal impact on the cell assembly.
Implementation Method 1
resistance welding
Implementation Method 2
ultrasonic welding
Implementation Method 3
laser welding
Data Source
AI summary
The present disclosure discloses a secondary battery and a manufacturing method thereof. According to the present disclosure, the influence of heat generated at a welding spot between an electrode tab and an electrode lead on the performance of a secondary battery may be minimized. Accordingly, in the design of a large capacity secondary battery, the battery performance may be close to an ideal condition.