Battery Cell End Cover Insulation Against Terminal Wire Shorts
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Solution Overview
Problem
The existing end cover assemblies of battery cells are prone to short circuits due to metal wires connecting the electrode terminal and the end cover, compromising safety and reliability during the connection process.
Innovation Solution
An end cover assembly design featuring a first through hole, an electrode terminal with a protrusion, a terminal board, and an insulating member with a blocking portion that extends radially to prevent short circuits, along with a sealing member to enhance sealing and safety, and a snap-fitted connection for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode terminal is connected to the end cover through metal wires, then electrical connection is achieved, but the risk of short circuit increases
Solution Approach 1:
The patent introduces an insulating member as an intermediary between the electrode terminal and the end cover. This insulating member includes an insulating body and a blocking portion that extends into the first through hole, physically preventing metal wires from contacting the end cover while still allowing electrical connection functionality. The blocking portion specifically blocks the path between the metal wire and the end cover, eliminating the short circuit risk.
Solution Approach 2:
The insulating member is segmented into two functional parts: the insulating body that provides overall insulation between the terminal board and end cover, and the blocking portion that specifically extends into the through hole to prevent wire contact. This segmentation allows each part to perform its specific function optimally, with the blocking portion acting as a physical barrier against short circuits.
2Reliability
If the insulating body is disposed between the terminal board and end cover, then insulation performance is improved, but the structural complexity increases
Solution Approach 1:
The insulating member is designed to perform multiple functions simultaneously: the insulating body provides insulation between the terminal board and end cover, the blocking portion prevents wire contact with the end cover, and the integrated sealing member provides sealing. By making one component (the insulating member) perform multiple functions, the patent reduces the total number of separate parts needed, thereby reducing structural complexity while maintaining or improving insulation performance.
Data Source
AI summary
An end cover assembly comprises: an end cover, an electrode terminal, a terminal board, and an insulating member. The end cover is provided with a first through hole; the electrode terminal comprises a terminal body and an annular first protrusion protruding from the outer peripheral surface of the terminal body, at least part of the terminal body is accommodated in the first through hole, and the diameter of the first protrusion is greater than that of the first through hole; the terminal board is disposed on the side of the end cover facing away from the first protrusion and is connected to the terminal body; the insulating member disposed around the terminal body; the insulating member comprises an insulating body and a blocking portion.