Battery Shell Connection Terminal for Reliable External Welding
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Solution Overview
Problem
The battery shell assembly in existing technologies lacks effective welding areas to connect with external circuit structures, resulting in poor welding quality between the battery shell assembly and external circuits.
Innovation Solution
A battery shell assembly is designed with a shell, a pole, and a connection terminal. The shell has an accommodating cavity for a core, and the connection terminal features a first welding portion electrically connected to the pole and a second welding portion configured for external circuit connection, with the second welding portion protruding to maintain reliable welding after initial welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple shell structure is used, then the device complexity is reduced, but the welding quality with external circuits deteriorates
Solution Approach 1:
The connection terminal is segmented into two distinct welding portions: a first welding portion for connecting to the pole and a second welding portion for connecting to external circuits. This segmentation allows each welding portion to be optimized for its specific function, ensuring reliable welding quality without complicating the overall shell structure.
Solution Approach 2:
The connection terminal acts as an intermediary component between the pole and external circuits. It provides dedicated welding portions that facilitate reliable electrical connection, solving the welding quality issue without requiring changes to the basic shell structure.
2Reliability
If welding areas are added to the shell, then the welding quality with external circuits is improved, but the device complexity increases
Solution Approach 1:
The connection terminal merges multiple functions into a single component: it provides both the first welding portion for pole connection and the second welding portion for external circuit connection. This integration improves welding quality without adding separate complex structures to the shell.
Solution Approach 2:
The connection terminal serves multiple purposes: it electrically connects the pole to external circuits, provides structured welding surfaces, and maintains insulation. This multi-functionality improves welding quality without increasing overall device complexity.
3Device complexity
If the second welding portion is flush with the first welding portion, then the device complexity is reduced, but the welding reliability deteriorates due to interference
Solution Approach 1:
The second welding portion protrudes from the first welding portion in the radial direction, creating a stepped structure. This dimensional change separates the welding areas spatially, preventing interference during welding operations while maintaining a relatively simple connection terminal design.
Solution Approach 2:
The connection terminal features an asymmetric stepped structure where the second welding portion protrudes relative to the first welding portion. This asymmetry ensures that welding operations on different portions do not interfere with each other, improving welding reliability without excessive structural complexity.
Data Source
AI summary
The present disclosure provide a battery shell assembly and a lithium-ion battery. The battery shell assembly includes a shell, a pole and a connection terminal. The shell is formed with an accommodating cavity. The pole is disposed at the first end of the shell and is insulatively connected to the shell. The connection terminal is disposed on one side of the pole away from the shell. The connection terminal has a first welding portion and a second welding portion. The second welding portion is protrudingly disposed on one side of the first welding portion away from the pole. The first welding portion is electrically connected with the pole. The second welding portion is disposed to be electrically connected with an external circuit.