Battery Tab Connecting Piece Prevents Unintended Electrical Contacts
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Solution Overview
Problem
The existing battery manufacturing methods face challenges in ensuring safe electrical connections between the tab portion and the pole assembly, as the tab portion often forms unintended connections with other components due to structural limitations, compromising safety performance.
Innovation Solution
The solution involves a battery design where the tab portion, comprising multiple single-piece tabs, is connected to the pole assembly through a connecting piece, with the vertical distance between the tab portion and the cell body optimized to prevent direct opposition, thus avoiding electrical connections with other structures, and utilizing a connecting piece to facilitate welding and enhance safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the tab portion is directly connected to the pole assembly, then the connection is simple, but the tab portion is likely to form unintended electrical connections with other components
Solution Approach 1:
A connecting piece is introduced as an intermediary component between the tab portion and the pole assembly. The connecting piece includes a first connecting end connected to the tab portion and a second connecting end connected to the pole assembly, thereby mediating the electrical connection and preventing direct contact that could lead to unintended electrical connections with other components.
Solution Approach 2:
The connecting piece extends in the first direction (vertical direction) to connect the tab portion and the pole assembly, creating a spatial separation that prevents the tab portion from being directly opposite the pole assembly. This dimensional arrangement ensures that the orthographic projections of the tab portion and the pole assembly along the first direction do not overlap, eliminating the risk of unintended electrical connections.
2Ease of manufacture
If the tab portion is bent during welding, then the connection can be made, but the structural limitations cause electrical connection issues
Solution Approach 1:
The connecting piece serves as a mediator that absorbs the structural limitations of the tab portion. By connecting to the tab portion at its end and extending vertically to the pole assembly, the connecting piece allows welding to be performed without bending the tab portion, thereby maintaining electrical connection safety while facilitating the welding process.
3Volume of moving object
If the vertical distance between the tab portion and the cell body is reduced, then the connection is more compact, but the tab portion may still overlap with the pole assembly
Solution Approach 1:
The connecting piece is designed to extend in the first direction (vertical direction) from the tab portion to the pole assembly. This vertical extension ensures that even when the battery is compact, the orthographic projections of the tab portion and the pole assembly along the first direction do not overlap, maintaining electrical connection safety while allowing for a compact overall design.
Data Source
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AI summary
The disclosure provides a battery, a battery module, a battery pack, and a battery manufacturing method. The battery includes a housing (10), a cell (20), a pole assembly (30) and a connecting piece (40). The housing (10) includes two first surfaces (11) opposite to each other in a first direction. The cell (20) is arranged in the housing (10) and includes a cell body (21) and a tab portion (22). The tab portion (22) includes two or more single-piece tabs extending from the lateral side of the cell body (21). The pole assembly (30) is arranged on the first surface (11), and the tab portion (22) and the pole assembly (30) are connected through the connecting piece (40). The vertical distance between an end of the tab portion (22) away from the lateral side of the cell body (21) and the lateral side of the cell body (21) is smaller than the vertical distance between the pole assembly (30) and lateral side of the cell body (21).