Battery End Cover Assembly for Terminal Short-Circuit Isolation
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Solution Overview
Problem
Existing battery technologies face a risk of short circuit in the end cover assembly, which compromises the safety performance of battery cells, primarily due to metal wires generated during the connection process between the electrode terminal and the terminal board, leading to potential safety accidents.
Innovation Solution
An end cover assembly is designed with a through hole, an electrode terminal, a terminal board, and a first insulating member that is clamped between the electrode terminal and the terminal board in the axial direction and located between the electrode terminal and the end cover in the radial direction, preventing metal wires from contacting the electrode terminal and end cover by blocking their transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode terminal is connected to the terminal board, then electrical connection is achieved, but metal wires may contact the end cover causing short circuit
Solution Approach 1:
The patent introduces an insulating member as an intermediary element between the electrode terminal and the end cover. This insulating member wraps around the electrode terminal and extends into the through hole, physically blocking metal wires from contacting the end cover while allowing electrical connection to be maintained through the terminal board.
Solution Approach 2:
The insulating member extends in multiple spatial dimensions: radially outward to wrap around the electrode terminal, axially into the through hole, and circumferentially to provide 360-degree protection. This multi-dimensional positioning ensures comprehensive blocking of metal wire transmission paths without interfering with electrical connection.
2Reliability
If insulation measures are added to prevent short circuit, then safety performance improves, but device complexity increases
Solution Approach 1:
The insulating member serves multiple functions simultaneously: it provides electrical insulation between the electrode terminal and end cover, mechanically supports the electrode terminal positioning, blocks metal wire transmission paths, and maintains structural integrity during assembly. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The insulating member is integrated with the end cover assembly structure, combining the insulation function with the existing terminal board and end cover components. The insulating member works cooperatively with these components to achieve short circuit prevention without requiring a completely separate insulation system.
Data Source
AI summary
An end cover assembly comprises: an end cover provided with a through hole; an electrode terminal at least part of which is located in the through hole; a terminal board insulated from the end cover, provided on a side of the end cover in the axial direction of the through hole and connected to the electrode terminal; and a first insulating member provided around the electrode terminal in the peripheral direction of the through hole, at least partially clamped between the electrode terminal and the terminal board in the axial direction, and at least partially located between an electrode terminal and the end cover and abutting against at least one of the electrode terminal and the end cover in a radial direction of the through hole.