Battery End Cover Assembly With Recessed Electrode Terminal
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Solution Overview
Problem
Current battery technologies face challenges in enhancing energy density, as the large size of electrode terminals outside the battery cell reduces the overall energy storage capacity.
Innovation Solution
The end cover assembly incorporates a concave portion on its abutting surface to accommodate part of the electrode terminal, reducing the terminal's external size and increasing energy density, while maintaining electrical connectivity through a connecting member and insulating member for safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode terminal is made larger to ensure electrical connection, then electrical connectivity is improved, but the space occupied outside the battery cell increases, reducing energy density
Solution Approach 1:
The electrode terminal is nested within the concave portion of the end cover, allowing the terminal to be accommodated inside the battery cell structure rather than extending outward. This nesting approach reduces the external volume occupied by the terminal while maintaining its electrical connection function through the connecting member that passes through the end cover.
2Ease of operation
If the electrode terminal extends further out to facilitate electrical connection, then ease of connection is improved, but the overall battery cell size increases, reducing energy density
Solution Approach 1:
The solution moves the electrode terminal connection from a purely external extension approach to a multi-dimensional arrangement where the terminal is positioned in the concave portion (internal dimension) while the connecting member extends through the end cover (external dimension). This dimensional reorganization allows electrical connection to be facilitated without proportionally increasing the battery cell volume.
3Strength
If the end cover thickness is increased to provide sufficient abutting surface, then structural strength is improved, but the space for accommodating electrode terminal is reduced
Solution Approach 1:
The end cover is designed with non-uniform thickness through the concave portion, creating local variations in structure. The abutting surface maintains sufficient thickness for structural strength and connecting member support, while the concave portion provides localized additional space for accommodating the electrode terminal. This local quality approach allows both strength and accommodation space requirements to be satisfied simultaneously.
Data Source
AI summary
An end cover assembly may include an end cover and an electrode terminal. The end cover may have an abutting surface. A terminal assembly may include the electrode terminal and a connector, where the connector may be configured to connect the electrode terminal and the end cover so as to fix the electrode terminal to the end cover, and the connector abuts against the abutting surface. The abutting surface may be provided with a concave portion recessed in a thickness direction of the end cover, and the concave portion may be configured to accommodate a part of the electrode terminal.