Battery Cell Pole Assembly Structure for Low-Damage Riveting
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Solution Overview
Problem
Poor riveting of the pole assembly in battery cells, such as cracking of insulating members or dimensional deformation during the riveting process, affects the safety and reliability of the battery cell and the battery containing it.
Innovation Solution
Designing a battery cell with a pole assembly where the bending portion has a lower bending resistance strength than the bearing portion, allowing it to be easily bent during riveting without excessive pressure, thereby reducing damage to surrounding components and improving the yield rate of the riveting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pole assembly is riveted to the battery cell using conventional methods, then the pole assembly can be fixed in position, but excessive riveting pressure causes damage to surrounding components such as insulating members and dimensional deformation
Solution Approach 1:
The pole body is designed with different bending resistance strengths in different regions: the bending portion has lower bending resistance strength to facilitate easy bending during riveting, while the bearing portion has higher bending resistance strength to maintain structural integrity and prevent damage to surrounding components during the riveting process
2Reliability
If the pole assembly is riveted with sufficient pressure to ensure proper positioning, then the pole assembly can be securely fixed, but this causes cracking of insulating members and dimensional deformation
Solution Approach 1:
The pole body structure differentiates between the bending portion with lower bending resistance strength that allows controlled deformation for positioning, and the bearing portion with higher bending resistance strength that maintains dimensional accuracy and prevents damage to insulating members during riveting
3Ease of manufacture
If the pole assembly uses a uniform structure throughout, then the manufacturing process is simpler, but the bearing portion cannot provide sufficient support during riveting of the bending portion
Solution Approach 1:
The pole body employs non-uniform structure with the bearing portion having higher bending resistance strength to provide adequate support during riveting, while the bending portion has lower bending resistance strength for easy deformation, resolving the conflict between manufacturing simplicity and structural strength requirements
Data Source
AI summary
A battery cell, a battery, and an electric device are provided. The battery cell has a battery housing, where a pole assembly is disposed on a first wall of the battery housing, the pole assembly includes a pole body, and the pole body includes: a bearing portion, the bearing portion being inserted through a mounting hole of the first wall; and a bending portion, the bending portion being connected to one end of the bearing portion in a central axis direction, bent relative to the bearing portion, and disposed on one side of the first wall, and a bending resistance strength of the bending portion being less than a bending resistance strength of the bearing portion. The battery includes the battery cell described above. The electric device includes the battery described above.